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MAX13089EESD+中文资料

General DescriptionThe MAX13080E–MAX13089E +5.0V, ±15kV ESD-protect-ed, RS-485/RS-422 transceivers feature one driver and one receiver. These devices include fail-safe circuitry,guaranteeing a logic-high receiver output when receiver inputs are open or shorted. The receiver outputs a logic-high if all transmitters on a terminated bus are disabled (high impedance). The MAX13080E–MAX13089E include a hot-swap capability to eliminate false transitions on the bus during power-up or hot insertion.The MAX13080E/MAX13081E/MAX13082E feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission up to 250kbps. The MAX13083E/MAX13084E/MAX13085E also feature slew-rate-limited drivers but allow transmit speeds up to 500kbps. The MAX13086E/MAX13087E/MAX13088E driver slew rates are not limited, making transmit speeds up to 16Mbps possible. The MAX13089E slew rate is pin selectable for 250kbps,500kbps, and 16Mbps.The MAX13082E/MAX13085E/MAX13088E are intended for half-duplex communications, and the MAX13080E/MAX13081E/MAX13083E/MAX13084E/MAX13086E/MAX13087E are intended for full-duplex communica-tions. The MAX13089E is selectable for half-duplex or full-duplex operation. It also features independently programmable receiver and transmitter output phase through separate pins.The MAX13080E–MAX13089E transceivers draw 1.2mA of supply current when unloaded or when fully loaded with the drivers disabled. All devices have a 1/8-unit load receiver input impedance, allowing up to 256transceivers on the bus.The MAX13080E/MAX13083E/MAX13086E/MAX13089E are available in 14-pin PDIP and 14-pin SO packages.The MAX13081E/MAX13082E/MAX13084E/MAX13085E/MAX13087E/MAX13088E are available in 8-pin PDIP and 8-pin SO packages. The devices operate over the com-mercial, extended, and automotive temperature ranges.ApplicationsUtility Meters Lighting Systems Industrial Control Telecom Security Systems Instrumentation ProfibusFeatures♦+5.0V Operation♦Extended ESD Protection for RS-485/RS-422 I/O Pins±15kV Human Body Model ♦True Fail-Safe Receiver While Maintaining EIA/TIA-485 Compatibility ♦Hot-Swap Input Structures on DE and RE ♦Enhanced Slew-Rate Limiting Facilitates Error-Free Data Transmission(MAX13080E–MAX13085E/MAX13089E)♦Low-Current Shutdown Mode (Except MAX13081E/MAX13084E/MAX13087E)♦Pin-Selectable Full-/Half-Duplex Operation (MAX13089E)♦Phase Controls to Correct for Twisted-Pair Reversal (MAX13089E)♦Allow Up to 256 Transceivers on the Bus ♦Available in Industry-Standard 8-Pin SO PackageMAX13080E–MAX13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers________________________________________________________________Maxim Integrated Products 1Ordering Information19-3590; Rev 1; 4/05For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .Selector Guide, Pin Configurations, and Typical Operating Circuits appear at end of data sheet.Ordering Information continued at end of data sheet.M A X 13080E –M A X 13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSDC ELECTRICAL CHARACTERISTICS(V CC = +5.0V ±10%, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5.0V and T A = +25°C.) (Note 1)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.(All Voltages Referenced to GND)Supply Voltage (V CC ).............................................................+6V Control Input Voltage (RE , DE, SLR,H/F , TXP, RXP)......................................................-0.3V to +6V Driver Input Voltage (DI)...........................................-0.3V to +6V Driver Output Voltage (Z, Y, A, B).............................-8V to +13V Receiver Input Voltage (A, B)....................................-8V to +13V Receiver Input VoltageFull Duplex (A, B)..................................................-8V to +13V Receiver Output Voltage (RO)....................-0.3V to (V CC + 0.3V)Driver Output Current.....................................................±250mAContinuous Power Dissipation (T A = +70°C)8-Pin SO (derate 5.88mW/°C above +70°C).................471mW 8-Pin Plastic DIP (derate 9.09mW/°C above +70°C).....727mW 14-Pin SO (derate 8.33mW/°C above +70°C)...............667mW 14-Pin Plastic DIP (derate 10.0mW/°C above +70°C)...800mW Operating Temperature RangesMAX1308_EC_ _.................................................0°C to +75°C MAX1308_EE_ _..............................................-40°C to +85°C MAX1308_EA_ _............................................-40°C to +125°C Junction Temperature......................................................+150°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°CMAX13080E–MAX13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers_______________________________________________________________________________________3DC ELECTRICAL CHARACTERISTICS (continued)(V CC = +5.0V ±10%, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5.0V and T A = +25°C.) (Note 1)M A X 13080E –M A X 13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers 4_______________________________________________________________________________________DRIVER SWITCHING CHARACTERISTICSMAX13080E/MAX13081E/MAX13082E/MAX13089E WITH SRL = UNCONNECTED (250kbps)(V CC = +5.0V ±10%, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5.0V and T A = +25°C.)RECEIVER SWITCHING CHARACTERISTICSMAX13080E/MAX13081E/MAX13082E/MAX13089E WITH SRL = UNCONNECTED (250kbps)(V CC = +5.0V ±10%, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5.0V and T A = +25°C.)MAX13080E–MAX13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers_______________________________________________________________________________________5DRIVER SWITCHING CHARACTERISTICSMAX13083E/MAX13084E/MAX13085E/MAX13089E WITH SRL = V CC (500kbps)(V CC = +5.0V ±10%, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5.0V and T A = +25°C.)RECEIVER SWITCHING CHARACTERISTICSMAX13083E/MAX13084E/MAX13085E/MAX13089E WITH SRL = V CC (500kbps)(V CC = +5.0V ±10%, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5.0V and T A = +25°C.)M A X 13080E –M A X 13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers 6_______________________________________________________________________________________DRIVER SWITCHING CHARACTERISTICSMAX13086E/MAX13087E/MAX13088E/MAX13089E WITH SRL = GND (16Mbps)(V CC = +5.0V ±10%, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5.0V and T A = +25°C.)RECEIVER SWITCHING CHARACTERISTICSMAX13086E/MAX13087E/MAX13088E/MAX13089E WITH SRL = GND (16Mbps)(V CC = +5.0V ±10%, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5.0V and T A = +25°C.)Note 2:∆V OD and ∆V OC are the changes in V OD and V OC , respectively, when the DI input changes state.Note 3:The short-circuit output current applies to peak current just prior to foldback current limiting. The short-circuit foldback outputcurrent applies during current limiting to allow a recovery from bus contention.MAX13080E–MAX13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers_______________________________________________________________________________________70.800.901.501.101.001.201.301.401.60-40-10520-253550958011065125SUPPLY CURRENT vs. TEMPERATURETEMPERATURE (°C)S U P P L Y C U R R E N T (m A )0201040305060021345OUTPUT CURRENTvs. RECEIVER OUTPUT-HIGH VOLTAGEM A X 13080E -89E t o c 02OUTPUT HIGH VOLTAGE (V)O U T P U T C U R R E N T (m A )20104030605070021345OUTPUT CURRENTvs. RECEIVER OUTPUT-LOW VOLTAGEM A X 13080E -89E t o c 03OUTPUT LOW VOLTAGE (V)O U T P U T C U R R E N T (m A )4.04.44.24.84.65.25.05.4RECEIVER OUTPUT-HIGH VOLTAGEvs. TEMPERATURETEMPERATURE (°C)O U T P U T H I G H V O L T A G E (V )-40-10520-2535509580110651250.10.70.30.20.40.50.60.8RECEIVER OUTPUT-LOW VOLTAGEvs. TEMPERATURETEMPERATURE (°C)O U T P U T L O W V O L T A G E (V )-40-10520-25355095801106512502040608010012014016012345DRIVER DIFFERENTIAL OUTPUT CURRENT vs. DIFFERENTIAL OUTPUT VOLTAGEDIFFERENTIAL OUTPUT VOLTAGE (V)D I F FE R E N T I A L O U T P U T C U R R E N T (m A )2.02.82.43.63.24.44.04.8DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs. TEMPERATURED I F FE R E N T I A L O U T P U T V O L T A G E (V )-40-10520-253550958011065125TEMPERATURE (°C)40201008060120140180160200-7-5-4-6-3-2-1012354OUTPUT CURRENT vs. TRANSMITTEROUTPUT-HIGH VOLTAGEOUTPUT HIGH VOLTAGE (V)O U T P U T C U R R E N T (m A )60402080100120140160180200042681012OUTPUT CURRENT vs. TRANSMITTEROUTPUT-LOW VOLTAGEOUTPUT-LOW VOLTAGE (V)O U T P U T C U R R E N T (m A )Typical Operating Characteristics(V CC = +5.0V, T A = +25°C, unless otherwise noted.)M A X 13080E –M A X 13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers 8_______________________________________________________________________________________21543679810SHUTDOWN CURRENT vs. TEMPERATUREM A X 13080E -89E t o c 10S H U T D O W N C U R R E N T (µA )-40-10520-253550958011065125TEMPERATURE (°C)600800700100090011001200DRIVER PROPAGATION DELAY vs. TEMPERATURE (250kbps)D R I VE R P R O P A G A T I O N D E L A Y (n s )-40-10520-253550958011065125TEMPERATURE (°C)300400350500450550600DRIVER PROPAGATION DELAY vs. TEMPERATURE (500kbps)D R I VE R P R O P A G A T I O N D E L A Y (n s )-40-10520-253550958011065125TEMPERATURE (°C)1070302040506080DRIVER PROPAGATION DELAY vs. TEMPERATURE (16Mbps)D R I VE R P R O P A G A T I O N D E L A Y (n s )-40-10520-253550958011065125TEMPERATURE (°C)40201008060120140160180RECEIVER PROPAGATION DELAYvs. TEMPERATURE (250kpbs AND 500kbps)R E C E I V E R P R O P A G A T I O N D E L A Y (n s )-40-10520-253550958011065125TEMPERATURE (°C)40201008060120140160180RECEIVER PROPAGATION DELAYvs. TEMPERATURE (16Mbps)R EC E I V E R P R O P A G AT I O N D E L A Y (n s )-40-10520-253550958011065125TEMPERATURE (°C)2µs/div DRIVER PROPAGATION DELAY (250kbps)DI 2V/divV Y - V Z 5V/divR L = 100Ω200ns/divRECEIVER PROPAGATION DELAY(250kbps AND 500kbps)V A - V B 5V/divRO 2V/divTypical Operating Characteristics (continued)(V CC = +5.0V, T A = +25°C, unless otherwise noted.)MAX13080E–MAX13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers_______________________________________________________________________________________9Test Circuits and Waveforms400ns/divDRIVER PROPAGATION DELAY (500kbps)DI 2V/divR L = 100ΩV Y - V Z 5V/div10ns/div DRIVER PROPAGATION DELAY (16Mbps)DI 2V/divR L = 100ΩV Y 2V/divV Z 2V/div40ns/divRECEIVER PROPAGATION DELAY (16Mbps)V B 2V/divR L = 100ΩRO 2V/divV A 2V/divTypical Operating Characteristics (continued)(V CC = +5.0V, T A = +25°C, unless otherwise noted.)Figure 2. Driver Timing Test CircuitM A X 13080E –M A X 13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers 10______________________________________________________________________________________Test Circuits and Waveforms (continued)Figure 4. Driver Enable and Disable Times (t DHZ , t DZH , t DZH(SHDN))DZL DLZ DLZ(SHDN)MAX13080E–MAX13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 TransceiversTest Circuits and Waveforms (continued)Figure 6. Receiver Propagation Delay Test CircuitM A X 13080E –M A X 13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 TransceiversMAX13080E–MAX13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 TransceiversMAX13080E/MAX13083E/MAX13086EMAX13081E/MAX13084E/MAX13086E/MAX13087EFunction TablesM A X 13080E –M A X 13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers MAX13082E/MAX13085E/MAX13088EFunction Tables (continued)MAX13089EDetailed Description The MAX13080E–MAX13089E high-speed transceivers for RS-485/RS-422 communication contain one driver and one receiver. These devices feature fail-safe circuit-ry, which guarantees a logic-high receiver output when the receiver inputs are open or shorted, or when they are connected to a terminated transmission line with all dri-vers disabled (see the Fail-Safe section). The MAX13080E/MAX13082E/MAX13083E/MAX13085E/ MAX13086E/MAX13088E/MAX13089E also feature a hot-swap capability allowing line insertion without erroneous data transfer (see the Hot Swap Capability section). The MAX13080E/MAX13081E/MAX13082E feature reduced slew-rate drivers that minimize EMI and reduce reflec-tions caused by improperly terminated cables, allowing error-free data transmission up to 250kbps. The MAX13083E/MAX13084E/MAX13085E also offer slew-rate limits allowing transmit speeds up to 500kbps. The MAX13086E/MAX13087E/MAX13088Es’ driver slew rates are not limited, making transmit speeds up to 16Mbps possible. The MAX13089E’s slew rate is selectable between 250kbps, 500kbps, and 16Mbps by driving a selector pin with a three-state driver.The MAX13082E/MAX13085E/MAX13088E are half-duplex transceivers, while the MAX13080E/MAX13081E/ MAX13083E/MAX13084E/MAX13086E/MAX13087E are full-duplex transceivers. The MAX13089E is selectable between half- and full-duplex communication by driving a selector pin (H/F) high or low, respectively.All devices operate from a single +5.0V supply. Drivers are output short-circuit current limited. Thermal-shutdown circuitry protects drivers against excessive power dissi-pation. When activated, the thermal-shutdown circuitry places the driver outputs into a high-impedance state.Receiver Input Filtering The receivers of the MAX13080E–MAX13085E, and the MAX13089E when operating in 250kbps or 500kbps mode, incorporate input filtering in addition to input hysteresis. This filtering enhances noise immunity with differential signals that have very slow rise and fall times. Receiver propagation delay increases by 25% due to this filtering.Fail-Safe The MAX13080E family guarantees a logic-high receiver output when the receiver inputs are shorted or open, or when they are connected to a terminated transmission line with all drivers disabled. This is done by setting the receiver input threshold between -50mV and -200mV. If the differential receiver input voltage (A - B) is greater than or equal to -50mV, RO is logic-high. If (A - B) is less than or equal to -200mV, RO is logic-low. In the case of a terminated bus with all transmitters disabled, the receiv-er’s differential input voltage is pulled to 0V by the termi-nation. With the receiver thresholds of the MAX13080E family, this results in a logic-high with a 50mV minimumnoise margin. Unlike previous fail-safe devices, the-50mV to -200mV threshold complies with the ±200mVEIA/TIA-485 standard.Hot-Swap Capability (Except MAX13081E/MAX13084E/MAX13087E)Hot-Swap InputsWhen circuit boards are inserted into a hot or powered backplane, differential disturbances to the data buscan lead to data errors. Upon initial circuit board inser-tion, the data communication processor undergoes itsown power-up sequence. During this period, the processor’s logic-output drivers are high impedanceand are unable to drive the DE and RE inputs of these devices to a defined logic level. Leakage currents up to±10µA from the high-impedance state of the proces-sor’s logic drivers could cause standard CMOS enableinputs of a transceiver to drift to an incorrect logic level. Additionally, parasitic circuit board capacitance couldcause coupling of V CC or GND to the enable inputs. Without the hot-swap capability, these factors could improperly enable the transceiver’s driver or receiver.When V CC rises, an internal pulldown circuit holds DElow and RE high. After the initial power-up sequence,the pulldown circuit becomes transparent, resetting thehot-swap tolerable input.Hot-Swap Input CircuitryThe enable inputs feature hot-swap capability. At theinput there are two NMOS devices, M1 and M2 (Figure 9). When V CC ramps from zero, an internal 7µstimer turns on M2 and sets the SR latch, which alsoturns on M1. Transistors M2, a 1.5mA current sink, andM1, a 500µA current sink, pull DE to GND through a5kΩresistor. M2 is designed to pull DE to the disabledstate against an external parasitic capacitance up to100pF that can drive DE high. After 7µs, the timer deactivates M2 while M1 remains on, holding DE low against three-state leakages that can drive DE high. M1 remains on until an external source overcomes the required input current. At this time, the SR latch resetsand M1 turns off. When M1 turns off, DE reverts to a standard, high-impedance CMOS input. Whenever V CCdrops below 1V, the hot-swap input is reset.For RE there is a complementary circuit employing two PMOS devices pulling RE to V CC. MAX13080E–MAX13089E+5.0V, ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 TransceiversM A X 13080E –M A X 13089EMAX13089E ProgrammingThe MAX13089E has several programmable operating modes. Transmitter rise and fall times are programma-ble, resulting in maximum data rates of 250kbps,500kbps, and 16Mbps. To select the desired data rate,drive SRL to one of three possible states by using a three-state driver: V CC , GND, or unconnected. F or 250kbps operation, set the three-state device in high-impedance mode or leave SRL unconnected. F or 500kbps operation, drive SRL high or connect it to V CC .F or 16Mbps operation, drive SRL low or connect it to GND. SRL can be changed during operation without interrupting data communications.Occasionally, twisted-pair lines are connected backward from normal orientation. The MAX13089E has two pins that invert the phase of the driver and the receiver to cor-rect this problem. F or normal operation, drive TXP and RXP low, connect them to ground, or leave them uncon-nected (internal pulldown). To invert the driver phase,drive TXP high or connect it to V CC . To invert the receiver phase, drive RXP high or connect it to V CC . Note that the receiver threshold is positive when RXP is high.The MAX13089E can operate in full- or half-duplex mode. Drive H/F low, leave it unconnected (internal pulldown), or connect it to GND for full-duplex opera-tion. Drive H/F high for half-duplex operation. In full-duplex mode, the pin configuration of the driver and receiver is the same as that of a MAX13080E. In half-duplex mode, the receiver inputs are internally connect-ed to the driver outputs through a resistor-divider. This effectively changes the function of the device’s outputs.Y becomes the noninverting driver output and receiver input, Z becomes the inverting driver output and receiver input. In half-duplex mode, A and B are still connected to ground through an internal resistor-divider but they are not internally connected to the receiver.±15kV ESD ProtectionAs with all Maxim devices, ESD-protection structures are incorporated on all pins to protect against electro-static discharges encountered during handling and assembly. The driver outputs and receiver inputs of the MAX13080E family of devices have extra protection against static electricity. Maxim’s engineers have devel-oped state-of-the-art structures to protect these pins against ESD of ±15kV without damage. The ESD struc-tures withstand high ESD in all states: normal operation,shutdown, and powered down. After an ESD event, the MAX13080E–MAX13089E keep working without latchup or damage.ESD protection can be tested in various ways. The transmitter outputs and receiver inputs of the MAX13080E–MAX13089E are characterized for protec-tion to the following limits:•±15kV using the Human Body Model•±6kV using the Contact Discharge method specified in IEC 61000-4-2ESD Test ConditionsESD performance depends on a variety of conditions.Contact Maxim for a reliability report that documents test setup, test methodology, and test results.Human Body ModelFigure 10a shows the Human Body Model, and Figure 10b shows the current waveform it generates when dis-charged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest,which is then discharged into the test device through a 1.5k Ωresistor.IEC 61000-4-2The IEC 61000-4-2 standard covers ESD testing and performance of finished equipment. However, it does not specifically refer to integrated circuits. The MAX13080E family of devices helps you design equip-ment to meet IEC 61000-4-2, without the need for addi-tional ESD-protection components.+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 TransceiversThe major difference between tests done using the Human Body Model and IEC 61000-4-2 is higher peak current in IEC 61000-4-2 because series resistance is lower in the IEC 61000-4-2 model. Hence, the ESD with-stand voltage measured to IEC 61000-4-2 is generally lower than that measured using the Human Body Model. Figure 10c shows the IEC 61000-4-2 model, and Figure 10d shows the current waveform for IEC 61000-4-2 ESD Contact Discharge test.Machine Model The machine model for ESD tests all pins using a 200pF storage capacitor and zero discharge resis-tance. The objective is to emulate the stress caused when I/O pins are contacted by handling equipment during test and assembly. Of course, all pins require this protection, not just RS-485 inputs and outputs.Applications Information256 Transceivers on the BusThe standard RS-485 receiver input impedance is 12kΩ(1-unit load), and the standard driver can drive up to 32-unit loads. The MAX13080E family of transceivers has a1/8-unit load receiver input impedance (96kΩ), allowingup to 256 transceivers to be connected in parallel on one communication line. Any combination of these devices,as well as other RS-485 transceivers with a total of 32-unit loads or fewer, can be connected to the line.Reduced EMI and ReflectionsThe MAX13080E/MAX13081E/MAX13082E feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission up to250kbps. The MAX13083E/MAX13084E/MAX13085Eoffer higher driver output slew-rate limits, allowing transmit speeds up to 500kbps. The MAX13089E withSRL = V CC or unconnected are slew-rate limited. WithSRL unconnected, the MAX13089E error-free data transmission is up to 250kbps. With SRL connected toV CC,the data transmit speeds up to 500kbps. MAX13080E–MAX13089E+5.0V, ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 TransceiversM A X 13080E –M A X 13089ELow-Power Shutdown Mode (Except MAX13081E/MAX13084E/MAX13087E)Low-power shutdown mode is initiated by bringing both RE high and DE low. In shutdown, the devices typically draw only 2.8µA of supply current.RE and DE can be driven simultaneously; the devices are guaranteed not to enter shutdown if RE is high and DE is low for less than 50ns. If the inputs are in this state for at least 700ns, the devices are guaranteed to enter shutdown.Enable times t ZH and t ZL (see the Switching Characteristics section) assume the devices were not in a low-power shutdown state. Enable times t ZH(SHDN)and t ZL(SHDN)assume the devices were in shutdown state. It takes drivers and receivers longer to become enabled from low-power shutdown mode (t ZH(SHDN), t ZL(SHDN))than from driver/receiver-disable mode (t ZH , t ZL ).Driver Output ProtectionTwo mechanisms prevent excessive output current and power dissipation caused by faults or by bus contention.The first, a foldback current limit on the output stage,provides immediate protection against short circuits over the whole common-mode voltage range (see the Typical Operating Characteristics ). The second, a thermal-shut-down circuit, forces the driver outputs into a high-imped-ance state if the die temperature exceeds +175°C (typ).Line LengthThe RS-485/RS-422 standard covers line lengths up to 4000ft. F or line lengths greater than 4000ft, use the repeater application shown in Figure 11.Typical ApplicationsThe MAX13082E/MAX13085E/MAX13088E/MAX13089E transceivers are designed for bidirectional data commu-nications on multipoint bus transmission lines. F igures 12 and 13 show typical network applications circuits. To minimize reflections, terminate the line at both ends in its characteristic impedance, and keep stub lengths off the main line as short as possible. The slew-rate-lim-ited MAX13082E/MAX13085E and the two modes of the MAX13089E are more tolerant of imperfect termination.Chip InformationTRANSISTOR COUNT: 1228PROCESS: BiCMOS+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 TransceiversFigure 11. Line Repeater for MAX13080E/MAX13081E/MAX13083E/MAX13084E/MAX13086E/MAX13087E/MAX13089E in Full-Duplex Mode+5.0V, ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 TransceiversMAX13080E–MAX13089EM A X 13080E –M A X 13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 TransceiversPin Configurations and Typical Operating CircuitsMAX13080E–MAX13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers______________________________________________________________________________________21Pin Configurations and Typical Operating Circuits (continued)M A X 13080E –M A X 13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers 22______________________________________________________________________________________Ordering Information (continued)MAX13080E–MAX13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers______________________________________________________________________________________23Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)。

MAX13089EEPD中文资料

General DescriptionThe MAX13080E–MAX13089E +5.0V, ±15kV ESD-protect-ed, RS-485/RS-422 transceivers feature one driver and one receiver. These devices include fail-safe circuitry,guaranteeing a logic-high receiver output when receiver inputs are open or shorted. The receiver outputs a logic-high if all transmitters on a terminated bus are disabled (high impedance). The MAX13080E–MAX13089E include a hot-swap capability to eliminate false transitions on the bus during power-up or hot insertion.The MAX13080E/MAX13081E/MAX13082E feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission up to 250kbps. The MAX13083E/MAX13084E/MAX13085E also feature slew-rate-limited drivers but allow transmit speeds up to 500kbps. The MAX13086E/MAX13087E/MAX13088E driver slew rates are not limited, making transmit speeds up to 16Mbps possible. The MAX13089E slew rate is pin selectable for 250kbps,500kbps, and 16Mbps.The MAX13082E/MAX13085E/MAX13088E are intended for half-duplex communications, and the MAX13080E/MAX13081E/MAX13083E/MAX13084E/MAX13086E/MAX13087E are intended for full-duplex communica-tions. The MAX13089E is selectable for half-duplex or full-duplex operation. It also features independently programmable receiver and transmitter output phase through separate pins.The MAX13080E–MAX13089E transceivers draw 1.2mA of supply current when unloaded or when fully loaded with the drivers disabled. All devices have a 1/8-unit load receiver input impedance, allowing up to 256transceivers on the bus.The MAX13080E/MAX13083E/MAX13086E/MAX13089E are available in 14-pin PDIP and 14-pin SO packages.The MAX13081E/MAX13082E/MAX13084E/MAX13085E/MAX13087E/MAX13088E are available in 8-pin PDIP and 8-pin SO packages. The devices operate over the com-mercial, extended, and automotive temperature ranges.ApplicationsUtility Meters Lighting Systems Industrial Control Telecom Security Systems Instrumentation ProfibusFeatures♦+5.0V Operation♦Extended ESD Protection for RS-485/RS-422 I/O Pins±15kV Human Body Model ♦True Fail-Safe Receiver While Maintaining EIA/TIA-485 Compatibility ♦Hot-Swap Input Structures on DE and RE ♦Enhanced Slew-Rate Limiting Facilitates Error-Free Data Transmission(MAX13080E–MAX13085E/MAX13089E)♦Low-Current Shutdown Mode (Except MAX13081E/MAX13084E/MAX13087E)♦Pin-Selectable Full-/Half-Duplex Operation (MAX13089E)♦Phase Controls to Correct for Twisted-Pair Reversal (MAX13089E)♦Allow Up to 256 Transceivers on the Bus ♦Available in Industry-Standard 8-Pin SO PackageMAX13080E–MAX13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers________________________________________________________________Maxim Integrated Products 1Ordering Information19-3590; Rev 1; 4/05For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .Selector Guide, Pin Configurations, and Typical Operating Circuits appear at end of data sheet.Ordering Information continued at end of data sheet.M A X 13080E –M A X 13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSDC ELECTRICAL CHARACTERISTICS(V CC = +5.0V ±10%, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5.0V and T A = +25°C.) (Note 1)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.(All Voltages Referenced to GND)Supply Voltage (V CC ).............................................................+6V Control Input Voltage (RE , DE, SLR,H/F , TXP, RXP)......................................................-0.3V to +6V Driver Input Voltage (DI)...........................................-0.3V to +6V Driver Output Voltage (Z, Y, A, B).............................-8V to +13V Receiver Input Voltage (A, B)....................................-8V to +13V Receiver Input VoltageFull Duplex (A, B)..................................................-8V to +13V Receiver Output Voltage (RO)....................-0.3V to (V CC + 0.3V)Driver Output Current.....................................................±250mAContinuous Power Dissipation (T A = +70°C)8-Pin SO (derate 5.88mW/°C above +70°C).................471mW 8-Pin Plastic DIP (derate 9.09mW/°C above +70°C).....727mW 14-Pin SO (derate 8.33mW/°C above +70°C)...............667mW 14-Pin Plastic DIP (derate 10.0mW/°C above +70°C)...800mW Operating Temperature RangesMAX1308_EC_ _.................................................0°C to +75°C MAX1308_EE_ _..............................................-40°C to +85°C MAX1308_EA_ _............................................-40°C to +125°C Junction Temperature......................................................+150°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°CMAX13080E–MAX13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers_______________________________________________________________________________________3DC ELECTRICAL CHARACTERISTICS (continued)(V CC = +5.0V ±10%, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5.0V and T A = +25°C.) (Note 1)M A X 13080E –M A X 13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers 4_______________________________________________________________________________________DRIVER SWITCHING CHARACTERISTICSMAX13080E/MAX13081E/MAX13082E/MAX13089E WITH SRL = UNCONNECTED (250kbps)(V CC = +5.0V ±10%, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5.0V and T A = +25°C.)RECEIVER SWITCHING CHARACTERISTICSMAX13080E/MAX13081E/MAX13082E/MAX13089E WITH SRL = UNCONNECTED (250kbps)(V CC = +5.0V ±10%, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5.0V and T A = +25°C.)MAX13080E–MAX13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers_______________________________________________________________________________________5DRIVER SWITCHING CHARACTERISTICSMAX13083E/MAX13084E/MAX13085E/MAX13089E WITH SRL = V CC (500kbps)(V CC = +5.0V ±10%, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5.0V and T A = +25°C.)RECEIVER SWITCHING CHARACTERISTICSMAX13083E/MAX13084E/MAX13085E/MAX13089E WITH SRL = V CC (500kbps)(V CC = +5.0V ±10%, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5.0V and T A = +25°C.)M A X 13080E –M A X 13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers 6_______________________________________________________________________________________DRIVER SWITCHING CHARACTERISTICSMAX13086E/MAX13087E/MAX13088E/MAX13089E WITH SRL = GND (16Mbps)(V CC = +5.0V ±10%, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5.0V and T A = +25°C.)RECEIVER SWITCHING CHARACTERISTICSMAX13086E/MAX13087E/MAX13088E/MAX13089E WITH SRL = GND (16Mbps)(V CC = +5.0V ±10%, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5.0V and T A = +25°C.)Note 2:∆V OD and ∆V OC are the changes in V OD and V OC , respectively, when the DI input changes state.Note 3:The short-circuit output current applies to peak current just prior to foldback current limiting. The short-circuit foldback outputcurrent applies during current limiting to allow a recovery from bus contention.MAX13080E–MAX13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers_______________________________________________________________________________________70.800.901.501.101.001.201.301.401.60-40-10520-253550958011065125SUPPLY CURRENT vs. TEMPERATURETEMPERATURE (°C)S U P P L Y C U R R E N T (m A )0201040305060021345OUTPUT CURRENTvs. RECEIVER OUTPUT-HIGH VOLTAGEM A X 13080E -89E t o c 02OUTPUT HIGH VOLTAGE (V)O U T P U T C U R R E N T (m A )20104030605070021345OUTPUT CURRENTvs. RECEIVER OUTPUT-LOW VOLTAGEM A X 13080E -89E t o c 03OUTPUT LOW VOLTAGE (V)O U T P U T C U R R E N T (m A )4.04.44.24.84.65.25.05.4RECEIVER OUTPUT-HIGH VOLTAGEvs. TEMPERATURETEMPERATURE (°C)O U T P U T H I G H V O L T A G E (V )-40-10520-2535509580110651250.10.70.30.20.40.50.60.8RECEIVER OUTPUT-LOW VOLTAGEvs. TEMPERATURETEMPERATURE (°C)O U T P U T L O W V O L T A G E (V )-40-10520-25355095801106512502040608010012014016012345DRIVER DIFFERENTIAL OUTPUT CURRENT vs. DIFFERENTIAL OUTPUT VOLTAGEDIFFERENTIAL OUTPUT VOLTAGE (V)D I F FE R E N T I A L O U T P U T C U R R E N T (m A )2.02.82.43.63.24.44.04.8DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs. TEMPERATURED I F FE R E N T I A L O U T P U T V O L T A G E (V )-40-10520-253550958011065125TEMPERATURE (°C)40201008060120140180160200-7-5-4-6-3-2-1012354OUTPUT CURRENT vs. TRANSMITTEROUTPUT-HIGH VOLTAGEOUTPUT HIGH VOLTAGE (V)O U T P U T C U R R E N T (m A )60402080100120140160180200042681012OUTPUT CURRENT vs. TRANSMITTEROUTPUT-LOW VOLTAGEOUTPUT-LOW VOLTAGE (V)O U T P U T C U R R E N T (m A )Typical Operating Characteristics(V CC = +5.0V, T A = +25°C, unless otherwise noted.)M A X 13080E –M A X 13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers 8_______________________________________________________________________________________21543679810SHUTDOWN CURRENT vs. TEMPERATUREM A X 13080E -89E t o c 10S H U T D O W N C U R R E N T (µA )-40-10520-253550958011065125TEMPERATURE (°C)600800700100090011001200DRIVER PROPAGATION DELAY vs. TEMPERATURE (250kbps)D R I VE R P R O P A G A T I O N D E L A Y (n s )-40-10520-253550958011065125TEMPERATURE (°C)300400350500450550600DRIVER PROPAGATION DELAY vs. TEMPERATURE (500kbps)D R I VE R P R O P A G A T I O N D E L A Y (n s )-40-10520-253550958011065125TEMPERATURE (°C)1070302040506080DRIVER PROPAGATION DELAY vs. TEMPERATURE (16Mbps)D R I VE R P R O P A G A T I O N D E L A Y (n s )-40-10520-253550958011065125TEMPERATURE (°C)40201008060120140160180RECEIVER PROPAGATION DELAYvs. TEMPERATURE (250kpbs AND 500kbps)R E C E I V E R P R O P A G A T I O N D E L A Y (n s )-40-10520-253550958011065125TEMPERATURE (°C)40201008060120140160180RECEIVER PROPAGATION DELAYvs. TEMPERATURE (16Mbps)R EC E I V E R P R O P A G AT I O N D E L A Y (n s )-40-10520-253550958011065125TEMPERATURE (°C)2µs/div DRIVER PROPAGATION DELAY (250kbps)DI 2V/divV Y - V Z 5V/divR L = 100Ω200ns/divRECEIVER PROPAGATION DELAY(250kbps AND 500kbps)V A - V B 5V/divRO 2V/divTypical Operating Characteristics (continued)(V CC = +5.0V, T A = +25°C, unless otherwise noted.)MAX13080E–MAX13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers_______________________________________________________________________________________9Test Circuits and Waveforms400ns/divDRIVER PROPAGATION DELAY (500kbps)DI 2V/divR L = 100ΩV Y - V Z 5V/div10ns/div DRIVER PROPAGATION DELAY (16Mbps)DI 2V/divR L = 100ΩV Y 2V/divV Z 2V/div40ns/divRECEIVER PROPAGATION DELAY (16Mbps)V B 2V/divR L = 100ΩRO 2V/divV A 2V/divTypical Operating Characteristics (continued)(V CC = +5.0V, T A = +25°C, unless otherwise noted.)Figure 2. Driver Timing Test CircuitM A X 13080E –M A X 13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers 10______________________________________________________________________________________Test Circuits and Waveforms (continued)Figure 4. Driver Enable and Disable Times (t DHZ , t DZH , t DZH(SHDN))DZL DLZ DLZ(SHDN)MAX13080E–MAX13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 TransceiversTest Circuits and Waveforms (continued)Figure 6. Receiver Propagation Delay Test CircuitM A X 13080E –M A X 13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 TransceiversMAX13080E–MAX13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 TransceiversMAX13080E/MAX13083E/MAX13086EMAX13081E/MAX13084E/MAX13086E/MAX13087EFunction TablesM A X 13080E –M A X 13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers MAX13082E/MAX13085E/MAX13088EFunction Tables (continued)MAX13089EDetailed Description The MAX13080E–MAX13089E high-speed transceivers for RS-485/RS-422 communication contain one driver and one receiver. These devices feature fail-safe circuit-ry, which guarantees a logic-high receiver output when the receiver inputs are open or shorted, or when they are connected to a terminated transmission line with all dri-vers disabled (see the Fail-Safe section). The MAX13080E/MAX13082E/MAX13083E/MAX13085E/ MAX13086E/MAX13088E/MAX13089E also feature a hot-swap capability allowing line insertion without erroneous data transfer (see the Hot Swap Capability section). The MAX13080E/MAX13081E/MAX13082E feature reduced slew-rate drivers that minimize EMI and reduce reflec-tions caused by improperly terminated cables, allowing error-free data transmission up to 250kbps. The MAX13083E/MAX13084E/MAX13085E also offer slew-rate limits allowing transmit speeds up to 500kbps. The MAX13086E/MAX13087E/MAX13088Es’ driver slew rates are not limited, making transmit speeds up to 16Mbps possible. The MAX13089E’s slew rate is selectable between 250kbps, 500kbps, and 16Mbps by driving a selector pin with a three-state driver.The MAX13082E/MAX13085E/MAX13088E are half-duplex transceivers, while the MAX13080E/MAX13081E/ MAX13083E/MAX13084E/MAX13086E/MAX13087E are full-duplex transceivers. The MAX13089E is selectable between half- and full-duplex communication by driving a selector pin (H/F) high or low, respectively.All devices operate from a single +5.0V supply. Drivers are output short-circuit current limited. Thermal-shutdown circuitry protects drivers against excessive power dissi-pation. When activated, the thermal-shutdown circuitry places the driver outputs into a high-impedance state.Receiver Input Filtering The receivers of the MAX13080E–MAX13085E, and the MAX13089E when operating in 250kbps or 500kbps mode, incorporate input filtering in addition to input hysteresis. This filtering enhances noise immunity with differential signals that have very slow rise and fall times. Receiver propagation delay increases by 25% due to this filtering.Fail-Safe The MAX13080E family guarantees a logic-high receiver output when the receiver inputs are shorted or open, or when they are connected to a terminated transmission line with all drivers disabled. This is done by setting the receiver input threshold between -50mV and -200mV. If the differential receiver input voltage (A - B) is greater than or equal to -50mV, RO is logic-high. If (A - B) is less than or equal to -200mV, RO is logic-low. In the case of a terminated bus with all transmitters disabled, the receiv-er’s differential input voltage is pulled to 0V by the termi-nation. With the receiver thresholds of the MAX13080E family, this results in a logic-high with a 50mV minimumnoise margin. Unlike previous fail-safe devices, the-50mV to -200mV threshold complies with the ±200mVEIA/TIA-485 standard.Hot-Swap Capability (Except MAX13081E/MAX13084E/MAX13087E)Hot-Swap InputsWhen circuit boards are inserted into a hot or powered backplane, differential disturbances to the data buscan lead to data errors. Upon initial circuit board inser-tion, the data communication processor undergoes itsown power-up sequence. During this period, the processor’s logic-output drivers are high impedanceand are unable to drive the DE and RE inputs of these devices to a defined logic level. Leakage currents up to±10µA from the high-impedance state of the proces-sor’s logic drivers could cause standard CMOS enableinputs of a transceiver to drift to an incorrect logic level. Additionally, parasitic circuit board capacitance couldcause coupling of V CC or GND to the enable inputs. Without the hot-swap capability, these factors could improperly enable the transceiver’s driver or receiver.When V CC rises, an internal pulldown circuit holds DElow and RE high. After the initial power-up sequence,the pulldown circuit becomes transparent, resetting thehot-swap tolerable input.Hot-Swap Input CircuitryThe enable inputs feature hot-swap capability. At theinput there are two NMOS devices, M1 and M2 (Figure 9). When V CC ramps from zero, an internal 7µstimer turns on M2 and sets the SR latch, which alsoturns on M1. Transistors M2, a 1.5mA current sink, andM1, a 500µA current sink, pull DE to GND through a5kΩresistor. M2 is designed to pull DE to the disabledstate against an external parasitic capacitance up to100pF that can drive DE high. After 7µs, the timer deactivates M2 while M1 remains on, holding DE low against three-state leakages that can drive DE high. M1 remains on until an external source overcomes the required input current. At this time, the SR latch resetsand M1 turns off. When M1 turns off, DE reverts to a standard, high-impedance CMOS input. Whenever V CCdrops below 1V, the hot-swap input is reset.For RE there is a complementary circuit employing two PMOS devices pulling RE to V CC. MAX13080E–MAX13089E+5.0V, ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 TransceiversM A X 13080E –M A X 13089EMAX13089E ProgrammingThe MAX13089E has several programmable operating modes. Transmitter rise and fall times are programma-ble, resulting in maximum data rates of 250kbps,500kbps, and 16Mbps. To select the desired data rate,drive SRL to one of three possible states by using a three-state driver: V CC , GND, or unconnected. F or 250kbps operation, set the three-state device in high-impedance mode or leave SRL unconnected. F or 500kbps operation, drive SRL high or connect it to V CC .F or 16Mbps operation, drive SRL low or connect it to GND. SRL can be changed during operation without interrupting data communications.Occasionally, twisted-pair lines are connected backward from normal orientation. The MAX13089E has two pins that invert the phase of the driver and the receiver to cor-rect this problem. F or normal operation, drive TXP and RXP low, connect them to ground, or leave them uncon-nected (internal pulldown). To invert the driver phase,drive TXP high or connect it to V CC . To invert the receiver phase, drive RXP high or connect it to V CC . Note that the receiver threshold is positive when RXP is high.The MAX13089E can operate in full- or half-duplex mode. Drive H/F low, leave it unconnected (internal pulldown), or connect it to GND for full-duplex opera-tion. Drive H/F high for half-duplex operation. In full-duplex mode, the pin configuration of the driver and receiver is the same as that of a MAX13080E. In half-duplex mode, the receiver inputs are internally connect-ed to the driver outputs through a resistor-divider. This effectively changes the function of the device’s outputs.Y becomes the noninverting driver output and receiver input, Z becomes the inverting driver output and receiver input. In half-duplex mode, A and B are still connected to ground through an internal resistor-divider but they are not internally connected to the receiver.±15kV ESD ProtectionAs with all Maxim devices, ESD-protection structures are incorporated on all pins to protect against electro-static discharges encountered during handling and assembly. The driver outputs and receiver inputs of the MAX13080E family of devices have extra protection against static electricity. Maxim’s engineers have devel-oped state-of-the-art structures to protect these pins against ESD of ±15kV without damage. The ESD struc-tures withstand high ESD in all states: normal operation,shutdown, and powered down. After an ESD event, the MAX13080E–MAX13089E keep working without latchup or damage.ESD protection can be tested in various ways. The transmitter outputs and receiver inputs of the MAX13080E–MAX13089E are characterized for protec-tion to the following limits:•±15kV using the Human Body Model•±6kV using the Contact Discharge method specified in IEC 61000-4-2ESD Test ConditionsESD performance depends on a variety of conditions.Contact Maxim for a reliability report that documents test setup, test methodology, and test results.Human Body ModelFigure 10a shows the Human Body Model, and Figure 10b shows the current waveform it generates when dis-charged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest,which is then discharged into the test device through a 1.5k Ωresistor.IEC 61000-4-2The IEC 61000-4-2 standard covers ESD testing and performance of finished equipment. However, it does not specifically refer to integrated circuits. The MAX13080E family of devices helps you design equip-ment to meet IEC 61000-4-2, without the need for addi-tional ESD-protection components.+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 TransceiversThe major difference between tests done using the Human Body Model and IEC 61000-4-2 is higher peak current in IEC 61000-4-2 because series resistance is lower in the IEC 61000-4-2 model. Hence, the ESD with-stand voltage measured to IEC 61000-4-2 is generally lower than that measured using the Human Body Model. Figure 10c shows the IEC 61000-4-2 model, and Figure 10d shows the current waveform for IEC 61000-4-2 ESD Contact Discharge test.Machine Model The machine model for ESD tests all pins using a 200pF storage capacitor and zero discharge resis-tance. The objective is to emulate the stress caused when I/O pins are contacted by handling equipment during test and assembly. Of course, all pins require this protection, not just RS-485 inputs and outputs.Applications Information256 Transceivers on the BusThe standard RS-485 receiver input impedance is 12kΩ(1-unit load), and the standard driver can drive up to 32-unit loads. The MAX13080E family of transceivers has a1/8-unit load receiver input impedance (96kΩ), allowingup to 256 transceivers to be connected in parallel on one communication line. Any combination of these devices,as well as other RS-485 transceivers with a total of 32-unit loads or fewer, can be connected to the line.Reduced EMI and ReflectionsThe MAX13080E/MAX13081E/MAX13082E feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission up to250kbps. The MAX13083E/MAX13084E/MAX13085Eoffer higher driver output slew-rate limits, allowing transmit speeds up to 500kbps. The MAX13089E withSRL = V CC or unconnected are slew-rate limited. WithSRL unconnected, the MAX13089E error-free data transmission is up to 250kbps. With SRL connected toV CC,the data transmit speeds up to 500kbps. MAX13080E–MAX13089E+5.0V, ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 TransceiversM A X 13080E –M A X 13089ELow-Power Shutdown Mode (Except MAX13081E/MAX13084E/MAX13087E)Low-power shutdown mode is initiated by bringing both RE high and DE low. In shutdown, the devices typically draw only 2.8µA of supply current.RE and DE can be driven simultaneously; the devices are guaranteed not to enter shutdown if RE is high and DE is low for less than 50ns. If the inputs are in this state for at least 700ns, the devices are guaranteed to enter shutdown.Enable times t ZH and t ZL (see the Switching Characteristics section) assume the devices were not in a low-power shutdown state. Enable times t ZH(SHDN)and t ZL(SHDN)assume the devices were in shutdown state. It takes drivers and receivers longer to become enabled from low-power shutdown mode (t ZH(SHDN), t ZL(SHDN))than from driver/receiver-disable mode (t ZH , t ZL ).Driver Output ProtectionTwo mechanisms prevent excessive output current and power dissipation caused by faults or by bus contention.The first, a foldback current limit on the output stage,provides immediate protection against short circuits over the whole common-mode voltage range (see the Typical Operating Characteristics ). The second, a thermal-shut-down circuit, forces the driver outputs into a high-imped-ance state if the die temperature exceeds +175°C (typ).Line LengthThe RS-485/RS-422 standard covers line lengths up to 4000ft. F or line lengths greater than 4000ft, use the repeater application shown in Figure 11.Typical ApplicationsThe MAX13082E/MAX13085E/MAX13088E/MAX13089E transceivers are designed for bidirectional data commu-nications on multipoint bus transmission lines. F igures 12 and 13 show typical network applications circuits. To minimize reflections, terminate the line at both ends in its characteristic impedance, and keep stub lengths off the main line as short as possible. The slew-rate-lim-ited MAX13082E/MAX13085E and the two modes of the MAX13089E are more tolerant of imperfect termination.Chip InformationTRANSISTOR COUNT: 1228PROCESS: BiCMOS+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 TransceiversFigure 11. Line Repeater for MAX13080E/MAX13081E/MAX13083E/MAX13084E/MAX13086E/MAX13087E/MAX13089E in Full-Duplex Mode+5.0V, ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 TransceiversMAX13080E–MAX13089EM A X 13080E –M A X 13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 TransceiversPin Configurations and Typical Operating CircuitsMAX13080E–MAX13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers______________________________________________________________________________________21Pin Configurations and Typical Operating Circuits (continued)M A X 13080E –M A X 13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers 22______________________________________________________________________________________Ordering Information (continued)MAX13080E–MAX13089E+5.0V , ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers______________________________________________________________________________________23Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)。

MAX809TTRG资料

MAX809 Series,MAX810 SeriesVery Low Supply Current3−Pin MicroprocessorReset MonitorsThe MAX809 and MAX810 are cost−effective system supervisor circuits designed to monitor V CC in digital systems and provide a reset signal to the host processor when necessary. No external components are required.The reset output is driven active within 10 m sec of V CC falling through the reset voltage threshold. Reset is maintained active for a timeout period which is trimmed by the factory after V CC rises above the reset threshold. The MAX810 has an active−high RESET output while the MAX809 has an active−low RESET output. Both devices are available in SOT−23 and SC−70 packages.The MAX809/810 are optimized to reject fast transient glitches on the V CC line. Low supply current of 0.5 m A (V CC= 3.2 V) makes these devices suitable for battery powered applications.Features•Precision V CC Monitor for 1.5 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V, and 5.0 V Supplies•Precision Monitoring V oltages from 1.2 V to 4.9 V Availablein 100 mV Steps•Four Guaranteed Minimum Power−On Reset Pulse Width Available (1 ms, 20 ms, 100 ms, and 140 ms)•RESET Output Guaranteed to V CC = 1.0 V.•Low Supply Current•Compatible with Hot Plug Applications•V CC Transient Immunity•No External Components•Wide Operating Temperature: −40°C to 105°C•Pb−Free Packages are AvailableTypical Applications•Computers•Embedded Systems•Battery Powered Equipment•Critical Microprocessor Power Supply MonitoringV CCFigure 1. Typical Application DiagramSee general marking information in the device marking section on page 8 of this data sheet.DEVICE MARKING INFORMATIONSee detailed ordering and shipping information in the package dimensions section on page 8 of this data sheet.ORDERING INFORMATIONPIN DESCRIPTIONPin No.Symbol Description1GND Ground2RESET (MAX809)RESET output remains low while V CC is below the reset voltage threshold, and for a reset timeoutperiod after V CC rises above reset threshold2RESET (MAX810)RESET output remains high while V CC is below the reset voltage threshold, and for a reset timeoutperiod after V CC rises above reset threshold3V CC Supply Voltage (Typ)ABSOLUTE MAXIMUM RATINGSRating Symbol Value Unit Power Supply Voltage (V CC to GND)V CC−0.3 to 6.0V RESET Output Voltage (CMOS)−0.3 to (V CC + 0.3)V Input Current, V CC20mA Output Current, RESET20mAdV/dt (V CC)100V/m secThermal Resistance, Junction−to−Air (Note 1)SOT−23SC−70R q JA301314°C/WOperating Junction Temperature Range T J−40 to +105°C Storage Temperature Range T stg−65 to +150°C Lead Temperature (Soldering, 10 Seconds)T sol+260°C ESD ProtectionHuman Body Model (HBM): Following Specification JESD22−A114 Machine Model (MM): Following Specification JESD22−A1152000200VLatchup Current Maximum Rating: Following Specification JESD78 Class IIPositiveNegative I Latchup200200mAStresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.1.This based on a 35x35x1.6mm FR4 PCB with 10mm2 of 1 oz copper traces under natural convention conditions and a single componentcharacterization.2.The maximum package power dissipation limit must not be exceeded.P D+T J(max)*T Aq JAwith T J(max) = 150°CELECTRICAL CHARACTERISTICS T A = −40°C to +105°C unless otherwise noted. Typical values are at T A = +25°C. (Note 3) Characteristic Symbol Min Typ Max Unit V CC RangeT A = 0°C to +70°CT A = −40°C to +105°C 1.01.2−−5.55.5VSupply CurrentV CC = 3.3 VT A = −40°C to +85°CT A = 85°C to +105°C V CC = 5.5 VT A = −40°C to +85°CT A = 85°C to +105°C I CC−−−−0.5−0.8−1.22.01.82.5m AReset Threshold (V in Decreasing) (Note 4)V TH V MAX809SN490T A = +25°CT A = −40°C to +85°C T A = +85°C to +105°C 4.834.784.664.9−−4.975.025.14MAX8xxLTR, MAX8xxSQ463T A = +25°CT A = −40°C to +85°C T A = +85°C to +105°C 4.564.504.404.63−−4.704.754.86MAX809HTRT A = +25°CT A = −40°C to +85°C T A = +85°C to +105°C 4.484.434.324.55 4.624.674.78MAX8xxMTR, MAX8xxSQ438T A = +25°CT A = −40°C to +85°C T A = +85°C to +105°C 4.314.274.164.38 4.454.494.60MAX809JTR, MAX8xxSQ400T A = +25°CT A = −40°C to +85°C T A = +85°C to +105°C 3.943.903.804.00−−4.064.104.20MAX8xxTTR, MAX809SQ308T A = +25°CT A = −40°C to +85°C T A = +85°C to +105°C 3.043.002.923.08−−3.113.163.24MAX8xxSTR, MAX8xxSQ293T A = +25°CT A = −40°C to +85°C T A = +85°C to +105°C 2.892.852.782.93−−2.963.003.08MAX8xxRTR, MAX8xxSQ263T A = +25°CT A = −40°C to +85°C T A = +85°C to +105°C 2.592.562.492.63−−2.662.702.77MAX809SN232, MAX809SQ232T A = +25°CT A = −40°C to +85°C T A = +85°C to +105°C 2.282.252.212.32−−2.352.382.45MAX809SN160T A = +25°CT A = −40°C to +85°C T A = +85°C to +105°C 1.581.561.521.60−−1.621.641.68MAX809SN120, MAX8xxSQ120T A = +25°CT A = −40°C to +85°C T A = +85°C to +105°C 1.181.171.141.20−−1.221.231.263.Production testing done at T A = 25°C, over temperature limits guaranteed by design.4.Contact your ON Semiconductor sales representative for other threshold voltage options.ELECTRICAL CHARACTERISTICS(continued) T A = −40°C to +105°C unless otherwise noted. Typical values are atT A = +25°C. (Note 5)Characteristic Symbol Min Typ Max Unit Detector Voltage Threshold Temperature Coefficient−30−ppm/°C V CC to Reset Delay V CC = V TH to (V TH − 100 mV)−10−m secReset Active TimeOut Period (Note 6) MAX8xxSN(Q)293D1MAX8xxSN(Q)293D2MAX8xxSN(Q)293D3MAX8xxSN(Q)293t RP1.020100140−−−−3.366330460msecRESET Output Voltage Low (No Load) (MAX809)V CC = V TH − 0.2 V1.6 V v V TH v2.0 V, I SINK = 0.5 mA2.1 V v V TH v 4.0 V, I SINK = 1.2 mA4.1 V v V TH v 4.9 V, I SINK = 3.2 mAV OL−−0.3VRESET Output Voltage High (No Load) (MAX809)V CC = V TH + 0.2 V1.6 V v V TH v2.4 V, I SOURCE = 200 m A2.5 V v V TH v 4.9 V, I SOURCE = 500 m AV OH0.8 V CC−−VRESET Output Voltage High (No Load) (MAX810)V CC = V TH + 0.2 V1.6 V v V TH v2.4 V, I SOURCE = 200 m A2.5 V v V TH v 4.9 V, I SOURCE = 500 m AV OH0.8 V CC−−VRESET Output Voltage Low (No Load) (MAX810)V CC = V TH − 0.2 V1.6 V v V TH v2.0 V, I SINK = 0.5 mA2.1 V v V TH v 4.0 V, I SINK = 1.2 mA4.1 V v V TH v 4.9 V, I SINK = 3.2 mAV OL−−0.3V5.Production testing done at T A = 25°C, over temperature limits guaranteed by design.6.Contact your ON Semiconductor sales representative for timeout options availability for other threshold voltage options.TYPICAL OPERATING CHARACTERISTICS0.50.40.30.20.10S U P P L Y C U R R E N T (m A )0.60.250.150.0500.35S U P P L Y C U R R E N T (m A )−50−2502550TEMPERATURE (°C)S U P P L Y C U R R E N T (m A )75100−50−2502550TEMPERATURE (°C)100Figure 6. Supply Current vs. Temperature(No Load, MAX809)Figure 7. Supply Current vs. Temperature (NoLoad, MAX810)750.100.200.30TYPICAL OPERATING CHARACTERISTICS252015105.00−50−25255075TEMPERATURE (°C)O U T P U T V O L T A G E V C C (m V )30100250−50−252575125TEMPERATURE (°C)125P O W E R −D O W N R E S E T D E L A Y (m s e c )125−50−2502550TEMPERATURE (°C)N O R M A L I Z E D P O W E R −U P R E S E T T I M E O U T0.70.80.91.21.375100Figure 10. Power−Down Reset Delay vs.Temperature and Overdrive (V TH = 1.2 V)Figure 11. Power−Down Reset Delay vs.Temperature and Overdrive (V TH = 4.9 V)Figure 12. Normalized Power−Up Reset vs.Temperature10050751.01.110050APPLICATIONS INFORMATIONV CC Transient RejectionThe MAX809 provides accurate V CC monitoring and reset timing during power−up, power−down, and brownout/sag conditions, and rejects negative−going transients (glitches) on the power supply line. Figure 13shows the maximum transient duration vs. maximum negative excursion (overdrive) for glitch rejection. Any combination of duration and overdrive which lies under the curve will not generate a reset signal. Combinations above the curve are detected as a brownout or power−down.Typically, transient that goes 100 mV below the reset threshold and lasts 5.0 m s or less will not cause a reset pulse.Transient immunity can be improved by adding a capacitor in close proximity to the V CC pin of the MAX809.Figure 13. Maximum Transient Duration vs.Overdrive for Glitch Rejection at 25°CV CC1011060M A X I M U M T R A N S I E N T D U R A T I O N (m s e c )RESET COMPARATOR OVERDRIVE (mV)410160210260310360RESET Signal Integrity During Power−DownThe MAX809 RESET output is valid to V CC = 1.0 V .Below this voltage the output becomes an “open circuit” and does not sink current. This means CMOS logic inputs to the Microprocessor will be floating at an undetermined voltage.Most digital systems are completely shutdown well above this voltage. However, in situations where RESET must bemaintained valid to V CC = 0 V , a pull−down resistor must be connected from RESET to ground to discharge stray capacitances and hold the output low (Figure 14). This resistor value, though not critical, should be chosen such that it does not appreciably load RESET under normal operation (100 k W will be suitable for most applications).Figure 14. Ensuring RESET Valid to V CC = 0 VProcessors With Bidirectional I/O PinsSome Microprocessor’s have bidirectional reset pins.Depending on the current drive capability of the processor pin, an indeterminate logic level may result if there is a logic conflict. This can be avoided by adding a 4.7 k W resistor in series with the output of the MAX809 (Figure 15). If there are other components in the system which require a reset signal, they should be buffered so as not to load the reset line.If the other components are required to follow the reset I/O of the Microprocessor, the buffer should be connected as shown with the solid line.Figure 15. Interfacing to Bidirectional Reset I/OBUFFERED RESETORDERING, MARKING AND THRESHOLD INFORMATIONPart Number V TH*(V)Timeout*(ms)Description Marking Package Shipping†MAX809SN160T1 1.60140−460Push−Pull RESET SAA SOT23−33000 / Tape & ReelMAX809SN160T1G 1.60140−460SAA SOT23−3(Pb−Free)MAX809SN232T1 2.32140−460SQP SOT23−3MAX809SN232T1G 2.32140−460SQP SOT23−3(Pb−Free)MAX809RTR 2.63140−460SPS SOT23−3MAX809RTRG 2.63140−460SPS SOT23−3(Pb−Free)MAX809STR 2.93140−460SPT SOT23−3MAX809STRG 2.93140−460SPT SOT23−3(Pb−Free)MAX809TTR 3.08140−460SPU SOT23−3MAX809TTRG 3.08140−460SPU SOT23−3(Pb−Free)MAX809JTR 4.00140−460SPR SOT23−3MAX809JTRG 4.00140−460SPR SOT23−3(Pb−Free)MAX809MTR 4.38140−460SPV SOT23−3MAX809MTRG 4.38140−460SPV SOT23−3(Pb−Free)MAX809HTR 4.55140−460SBD SOT23−3MAX809HTRG 4.55140−460SBD SOT23−3(Pb−Free)MAX809LTR 4.63140−460SPW SOT23−3MAX809LTRG 4.63140−460SPW SOT23−3(Pb−Free)MAX809SN490T1 4.90140−460SBH SOT23−3MAX809SN490T1G 4.90140−460SBH SOT23−3(Pb−Free)MAX809SN120T1G 1.20140−460SSO SOT23−3(Pb−Free)MAX809SN293D1T1G 2.931−3.3SSP SOT23−3(Pb−Free)MAX809SN293D2T1G 2.9320−66SSQ SOT23−3(Pb−Free)MAX809SN293D3T1G 2.93100−330SSR SOT23−3(Pb−Free)MAX809SQ120T1G 1.20140−460ZD SC70−3(Pb−Free)MAX809SQ232T1G 2.32140−460ZE SC70−3(Pb−Free)MAX809SQ263T1G 2.63140−460ZF SC70−3(Pb−Free)MAX809SQ293T1G 2.93140−460ZG SC70−3(Pb−Free)MAX809SQ308T1G 3.08140−460ZH SC70−3(Pb−Free)MAX809SQ400T1G 4.00140−460SZ SC70−3(Pb−Free)MAX809SQ438T1G 4.38140−460ZI SC70−3(Pb−Free)MAX809SQ463T1G 4.63140−460ZJ SC70−3(Pb−Free)MAX809SQ293D1T1G 2.931−3.3ZK SC70−3(Pb−Free)MAX809SQ293D2T1G 2.9320−66ZL SC70−3(Pb−Free)MAX809SQ293D3T1G 2.93100−330ZM SC70−3(Pb−Free)†For information on tape and reel specifications,including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D.*Contact your ON Semiconductor sales representative for other threshold voltage options.ORDERING, MARKING AND THRESHOLD INFORMATIONPart Number V TH*(V)Timeout*(ms)Description Marking Package Shipping†MAX810RTR 2.63140−460Push−Pull RESET SPX SOT23−33000 / Tape & ReelMAX810RTRG 2.63140−460SPX SOT23−3(Pb−Free)MAX810STR 2.93140−460SPY SOT23−3MAX810STRG 2.93140−460SPY SOT23−3(Pb−Free)MAX810TTR 3.08140−460SPZ SOT23−3MAX810TTRG 3.08140−460SPZ SOT23−3(Pb−Free)MAX810MTR 4.38140−460SQA SOT23−3MAX810MTRG 4.38140−460SQA SOT23−3(Pb−Free)MAX810LTR 4.63140−460SQB SOT23−3MAX810LTRG 4.63140−460SQB SOT23−3(Pb−Free)MAX810SN120T1G 1.20140−460SSS SOT23−3(Pb−Free)MAX810SN293D1T1G 2.931−3.3SST SOT23−3(Pb−Free)MAX810SN293D2T1G 2.9320−66SSU SOT23−3(Pb−Free)MAX810SN293D3T1G 2.93100−330SSZ SOT23−3(Pb−Free)MAX810SQ120T1G 1.20140−460ZN SC70−3(Pb−Free)MAX810SQ263T1G 2.63140−460ZO SC70−3(Pb−Free)MAX810SQ293T1G 2.93140−460ZP SC70−3(Pb−Free)MAX810SQ438T1G 4.38140−460ZQ SC70−3(Pb−Free)MAX810SQ463T1G 4.63140−460ZR SC70−3(Pb−Free)MAX810SQ293D1T1G 2.931−3.3ZS SC70−3(Pb−Free)MAX810SQ293D2T1G 2.9320−66ZT SC70−3(Pb−Free)MAX810SQ293D3T1G 2.93100−330ZU SC70−3(Pb−Free)†For information on tape and reel specifications,including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D.*Contact your ON Semiconductor sales representative for other threshold voltage options.PACKAGE DIMENSIONSSOT−23 (TO236)CASE 318−08ISSUE AN*For additional information on our Pb−Free strategy and solderingdetails, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.SOLDERING FOOTPRINT*ǒmm inchesǓSCALE 10:1NOTES:1.DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.2.CONTROLLING DIMENSION: INCH.3.MAXIMUM LEAD THICKNESS INCLUDES LEAD FINISH THICKNESS. MINIMUM LEADTHICKNESS IS THE MINIMUM THICKNESS OF BASE MATERIAL.4.318−01 THRU −07 AND −09 OBSOLETE, NEW STANDARD 318−08.VIEW CDIM A MIN NOM MAX MINMILLIMETERS0.89 1.00 1.110.035INCHES A10.010.060.100.001b 0.370.440.500.015c 0.090.130.180.003D 2.80 2.90 3.040.110E 1.20 1.30 1.400.047e 1.78 1.90 2.040.070L 0.100.200.300.0040.0400.0440.0020.0040.0180.0200.0050.0070.1140.1200.0510.0550.0750.0810.0080.012NOM MAX L1 2.102.40 2.640.0830.0940.104H E0.350.540.690.0140.0210.029MAX809 Series, MAX810 SeriesPACKAGE DIMENSIONSSC−70 (SOT−323)CASE 419−04ISSUE Mǒmm inchesǓSCALE 10:1*For additional information on our Pb−Free strategy and solderingdetails, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.PUBLICATION ORDERING INFORMATION元器件交易网。

超特克（Supertex）MD1812和MD1813芯片应用说明书

Supertex inc.AN-H56Application NoteIntroductionThe MD1812 and the MD1813 are two unique composite return-to-zero (RTZ) pulser drivers for ultrasound applications. The ICs have built-in level shifters that provide negative P-MOS gate DC bias and fast AC coupled gate drivesignals. They enable the fast damping functions necessary to generate return-to-zero bipolar pulses, and are also able to keep the zero-state to as long as needed, even to infinity. These kinds of fast return-to zero and DC coupled features are very useful for medical ultrasound imaging equipment, piezoelectric transducer drivers, material flaw detection, ultrasonic NDT detection, and sonar ranger applications, especially for those that need to launch ultrasound in pseudo-random codes. Designing a Pulser with the MD1812/13This a pplication n ote d escribes h ow t o u se M D1812 o r M D1813 to design the basic channel of an ultrasound transmitter with the RTZ feature. The circuit is a single channel ultrasound transmitter using the MD1812 or MD1813 to drive TC6320 & TC2320 MOSFETs. It can generate fast return to zero waveforms. The output of high voltage to transducer has ±2A source and sink current capability. A CPLD programmable logic circuit and on-board 40MHz crystal oscillator generate a fast logic signal to control the pulse circuit. The CPLD hasa six-pin JTAG connection for Xilinx’s USB or a convenient parallel-port programming link cable. The circuit consists of one MD1812K6 or MD1813K6 in a 16-lead 4x4x0.9mm QFN package, driving TC6320FGs and TC2320FGs, two complementary high-voltage P and N- channel MOSFETs in one single SO-8 package. The input stage of the MD1812/13 is a high-speed level translator that is able to operate with logic input signals of 1.2V to 5.0V amplitude. In this circuit, the CPLD output logic is typically 3.3V. An adaptive threshold circuit is used with the OE pininside of the MD1812 to set the level translator threshold to the middle of the input logic 0 and logic 1 levels. The OE pin serves a dual purpose. First, its logic 1 level is used to compute the threshold voltage level for the channel input level translators. Second, when OE is low, the outputs are disabled, with the A and C outputs high and the B and Doutputs low (for MD1812 only). This assists in properly pre-charging the coupling capacitors that may be used in series in the gate drive circuit of external PMOS and NMOS FETs. The MD1812/13 level translator uses a proprietary composite drive circuit, which provides DC coupling, together with high-speed operation. The output pin, OUT C , is designed to drive the return-to-zero PMOS FET through a capacitor as fast as an AC coupling gate driver, and OUT G provides delayed DC coupling negative biased gate control to the same PMOS FET. The OUT C swings between V H and V L voltages, while OUT G is within V SS or V NEG levels. Note that the OUT C and OUT G pins of one chip are designed to drive together forone PMOS FET, and that the PMOS FET source is typicallyconnected to the same potential of the MD1812/13 V SS voltage. Each of the output stages of OUT A , OUT B , OUT C & OUT D of MD1812/13 are capable of peak currents of up to ±2.0A, depending on the supply voltages used and load capacitance. But a 2kΩ resistor, R36, must be between OUT G and the gate of the PMOS FET, which is driven by the OUT C through a capacitor. This configuration provides the optimal series resistance value of the gate DC bias driver circuit.The output stage of the MD1812/13 has separate power connections enabling the output signal high and low levels to be chosen independently from the driver supply voltages. As an example, the input logic levels may be 0V and 1.8V, the control logic may be powered by +5V and –5V, and the output high and low levels may be varied anywhere over the range of +5V to -5V. In this design example, MD1812/13’s V DD and V H are both powered by +10V, V SS and V L are grounded, and V NEG is –10V. The source pin of the RTZ PMOS FET driven by the OUT C and OUT G pins is connected to ground.PCB Layout TechniquesIt is very important that the slab at the bottom of the IC package, which is the IC substrate “pin”, be externally connected to the V NEG pin to make sure it always has the lowest potential in any condition.Designing An Ultrasound Pulser with MD1812/MD1813 Composite DriversBy Ching Chu, Sr. Application EngineerUse high-speed PCB trace design practices that are compatible with the circuit’s operating speed. The internal circuitry of the MD1812/13 can operate at up to 100MHz, with the primary speed limitation being due to load capacitance. Because of this high speed and the high transient currents that result when driving capacitive loads, the supply voltage bypass capacitors should be as close to the supply pins as possible. The V SS and V L pins should have low inductance feed-through connections that are connected directly to a solid ground plane. If these voltages are not zero, they will require bypass capacitors similar to the positive power supplies. The V DD and V H supplies determine the output logic levels. These two pins can draw fast transient currents of up to 2.0A, so they should be provided with a low-impedance bypass capacitor at the chip’s pins. A ceramic capacitor of up to 1.0µF may be appropriate. Minimize the trace length to the ground plane, and insert a ferrite bead in the power supply lead to the capacitor to prevent resonance in the power supply lines. A common voltage source and local decoupling capacitor may be used for the V DD and V H pins, which should always have the same DC level applied to them. For applications that are sensitive to jitter and noise, insert another ferrite bead between V DD and V H and decouple each pin separately.Pay particular attention to minimizing trace lengths and using sufficient trace width to reduce inductance. Surfacemount components are highly recommended. Since the output impedance of this driver is very low, in some cases it may be desirable to add a small value resistor in series with the output to obtain better waveform integrity at the load terminals. This will, of course, reduce the output voltage slew rate at the terminals of a capacitive load. Pay particular attention to the parasitic coupling from the driver’s output to the input signal terminals. This feedback may causeoscillations or spurious waveform shapes on the edges of signal transitions. Since the input operates with signals down to 1.2V, even small coupling voltages may cause problems. Use of a solid ground plane and good power and signal layout practices will prevent this problem. Also ensure that the circulating ground return current from a capacitive load cannot react with common inductance to create noise voltages in the input logic circuitry.Testing the Ultrasound Pulser The MD1812 RTZ pulser design example is tested with the following power supply voltage and current limiting: V PP 0 to +100V 5mA, V NN 0 to -100V 5mA, V DD = +10V 50mA, V NEG -10V 5mA, V CC +3.3V, 90mA.The HV OUT signal appears at the SMA connector J6. There is a 5:1 attenuation of the signal, due to the value of resistor R11. When driving a real transducer load, the value of this resistor should be reduced in value to match the load impedance.The HV OUT signal passes through jumper J5, which can be used to terminate the HV OUT signal in a dummy load, comprising a 220pF capacitor in parallel with a 1kΩ resistor. When an external load is connected, the dummy load is not required, and J5 can be configured to pass the signals straight through to the output connector J6.All the on-board test points are designed to work with an active oscilloscope probe, such as the Tektronix P6243 1MΩ active probe. Because TP7 is connected to the HV OUT , where potentially damaging voltages could be present, make sure that V PP /V NN does not exceed the probe limit. If using another type of high impedance oscilloscope probe for the test points, ensure that the ground lead connections to the circuit board ground plane are as short as possible.There are multiple frequency and waveform combinations that can be selected as bipolar pulses, PW or CW waveforms. An external clock input can be used if the on-board 40MHz-oscillator is disabled. The external trigger input can be used to synchronize the output waveforms. There are five push buttons for selecting demo waveform, frequency, phase, and MD1812 chip enable functions. Color LEDs indicate the demo selection states. The CH1 output allows the monitoring of one of the 5 inputs (IN A , IN B , IN C , IN D or O E ) of the MD1812/13 via the select button. The MD1812 and the MD1813 are very similar in function. The only differences between them are the control of the OE (MD1812) vs VLL (MD1813) pin and their logic functions. Please read their data sheets for the details. In this design example, the CPLD program is using an on-board solder jumper, R34, to sense the difference and works accordingly. The example MD1812/13 pulser circuit schematic, detailsignals definitions, and some measured waveforms areshown below.Waveform C, 20MHz, 8 cycles Load: 220pF//1kPulser Circuit SchematicWaveform AWaveform CWaveform BWaveform DOE INA INB INC INDHV OUTV PPV NNOE INA INB INC INDHV OUTV PPV NNOE INAINBINC INDHV OUTV PPV NNOEINAINBINC IND HV OUTV PPV NNNote: The duty cycle of the PW burst is set about 0.2% for limitedpower dissipationNote: The duty cycle of the PW burst is set about 25% at ≤5.0MHz forlimited power dissipation.AN-H56MD1812/13 Reference DesignJ 6X D C RJ E X = L oFig. 1 Waveform of 2.5MHz Fig. 2 Waveform of 5MHzFig. 3 Waveform of 10MHz Fig. 4 Waveform of 10MHz InvertingFig. 5 Waveform of 20MHz 8 Cycles Fig. 6 Waveform of 5mHz & Delay ReadingsFig. 7 Waveform of 10MHz(at IN C , OUT C , OUT G , and P- Gate, V DD = 12V, V NEG = -10V)Fig. 8 Waveform of 5MHz(at IN C , OUT C , OUT G , and P- Gate, V DD = 5V, V NEG = -10V)Supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives an adequate “product liability indemnification insurance agreement.” Supertex inc. does not assume responsibility for use of devices described, and limits its liability to the replacement of the devices determined defective due to workmanship. No responsibility is assumed for possible omissions and inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications refer to the Supertex inc. (website: http//)©2013 Supertex inc.All rights reserved. Unauthorized use or reproduction is prohibited.Supertex inc.。

MEMORY存储芯片MAX823TEUK+T中文规格书

Manual Reset Input Many μP-based products require manual reset capabil -ity, allowing the operator, a test technician, or external logic circuitry to initiate a reset. A logic low on MR asserts reset. Reset remains asserted while MR is low, and for the Reset Active Timeout Period (t RP ) after MR returns high. This input has an internal 20kΩ pull-up resistor, so it can be left open if it is not used. MR can be driven with TTL or CMOS-logic levels, or with open-drain/collector outputs. Connect a normally open momentary switch from MR to GND to create a manual-reset function; external debounce circuitry is not required. If MR is driven from long cables or if the device is used in a noisy environment, connecting a 0.1μF capacitor from MR to ground provides additional noise immunity.Reset Threshold Accuracy The MAX811/MAX812 are ideal for systems using a 5V ±5% or 3V ±5% power supply with ICs specified for 5V ±10% or 3V ±10%, respectively. They are designed to meet worst-case specifications over temperature. The reset is guaranteed to assert after the power supplyfalls out of regulation, but before power drops below theminimum specified operating voltage range for the systemICs. The thresholds are pre-trimmed and exhibit tight dis -tribution, reducing the range over which an undesirable reset may occur.PINNAME FUNCTION MAX811MAX81211GND Ground 2—RESET Active-Low Reset Output. RESET remains low while V CC is below the reset threshold or while MR is held low. RESET remains low for the Reset Active Timeout Period (t RP ) after the reset conditions are terminated.—2RESET Active-High Reset Output. RESET remains high while V CC is below the reset threshold or while MR is held low. RESET remains high for Reset Active Timeout Period (t RP ) after the reset conditions are terminated.33MR Manual Reset Input. A logic low on MR asserts reset. Reset remains asserted as long as MR is low and for 180ms after MR returns high. This active-low input has an internal 20kΩ pull-up resistor. It can be driven from a TTL or CMOS-logic line, or shorted to ground with a switch. Leave open if unused.44V CC +5V, +3.3V, or +3V Supply Voltage Detailed DescriptionReset OutputA microprocessor’s (μP’s) reset input starts the μP in aknown state. These μP supervisory circuits assert resetto prevent code execution errors during power-up, power-down, or brownout conditions.RESET is guaranteed to be a logic low for V CC > 1V.Once V CC exceeds the reset threshold, an internal timerkeeps RESET low for the reset timeout period; after thisinterval, RESET goes high.If a brownout condition occurs (V CC dips below the resetthreshold), RESET goes low. Any time V CC goes belowthe reset threshold, the internal timer resets to zero, andRESET goes low. The internal timer starts after V CC returns above the reset threshold, and RESET remainslow for the reset timeout period.The manual reset input (MR ) can also initiate a reset. See the Manual Reset Input section.The MAX812 has an active-high RESET output that is theinverse of the MAX811’s RESET output.MAX811/MAX8124-Pin μP Voltage Monitorswith Manual Reset InputPin DescriptionTerminal Voltage (with respect to GND)V CC.....................................................................-0.3V to 6.0V All Other Inputs .....................................-0.3V to (V CC + 0.3V) Input Current, V CC, MR......................................................20mA Output Current, RESET or RESET ....................................20mA Continuous Power Dissipation (T A = +70°C)SOT143 (derate 4mW/°C above +70°C) .....................320mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range ............................-65°C to +160°C Lead Temperature (soldering, 10sec) .............................+300°C(V CC = 5V for L/M versions, V CC = 3.3V for T/S versions, V CC = 3V for R version, T A = -40°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITSOperating Voltage Range V CC T A = 0°C to +70°C 1.0 5.5V T A = -40°C to +85°C 1.2Supply Current I CC MAX81_L/M, V CC = 5.5V, I OUT = 0615µA MAX81_R/S/T, V CC = 3.6V, I OUT = 0 2.710Reset Threshold V TH MAX81_LT A = +25°C 4.54 4.63 4.72V T A = -40°C to +85°C 4.50 4.75MAX81_MT A = +25°C 4.30 4.38 4.46T A = -40°C to +85°C 4.25 4.50MAX81_TT A = +25°C 3.03 3.08 3.14T A = -40°C to +85°C 3.00 3.15MAX81_ST A = +25°C 2.88 2.93 2.98T A = -40°C to +85°C 2.85 3.00MAX81_RT A = +25°C 2.58 2.63 2.68T A = -40°C to +85°C 2.55 2.70Reset Threshold Tempco30ppm/°CV CC to Reset Delay (Note 2)V OD = 125mV, MAX81_L/M40µs V OD = 125mV, MAX81_R/S/T20Reset Active Timeout Period t RP V CC = V TH(MAX)140560ms MR Minimum Pulse Width t MR10µs MR Glitch Immunity (Note 3)100ns MR to Reset PropagationDelay (Note 2)t MD0.5µsMR Input Threshold V IHV CC > V TH(MAX), MAX81_L/M2.3V V IL0.8V IHV CC > V TH(MAX), MAX81_R/S/T0.7 x V CCV IL0.25 x V CCMR Pull-Up Resistance102030kΩRESET Output Voltage (MAX812)V OH I SOURCE = 150µA, 1.8V < V CC < V TH(MIN)0.8 x V CCV V OLMAX812R/S/T only, I SINK = 1.2mA,V CC = V TH(MAX)0.3MAX812L/M only, I SINK = 3.2mA,V CC = V TH(MAX)0.4MAX811/MAX8124-Pin μP Voltage Monitorswith Manual Reset Input Absolute Maximum RatingsStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Electrical Characteristics。

MAX9814中文资料ver2.0

```````````````````````````````````গၤNBY:925ဵጙ౒ࢅ߅۾Ă঱ອᒠ൱యज़हࡍ໭ǈดᒙᔈࣅᐐፄ఼ᒜ)BHD*ጲૺࢅᐅဉ൱యज़ມᒙăক໭ୈૹ߅ࢅᐅဉ༄ᒙहࡍ໭Ăభܤᐐፄहࡍ໭)WHB*Ăၒ߲हࡍ໭Ă൱యज़ມኹखည໭ጲૺBHD఼ᒜ࢟വăࢅᐅဉ༄ᒙहࡍ໭ࡼᐐፄৼࢾᆐ23eCǈऎWHBᐐፄభጲো௣ၒ߲࢟ኹਜ਼BHDඡሢᏴ31eCਜ਼1eCᒄମᔈࣅࢯஂăၒ߲हࡍ໭௥ᎌ9eCĂ29eCਜ਼39eCྯᒬభኡᐐፄăᏴ඗ᎌኹჁࡼᄟୈሆǈहࡍ໭଀ೊభဧᔐᐐፄࡉࡵ51eCĂ61eC૞71eCăྯზၫᔊၒྜྷܠ߈࿸ᒙၒ߲हࡍ໭ࡼᐐፄăᅪݝ࢟ᔜॊኹ໭఼ᒜBHDඡሢǈ࡝ৈ࢟ྏభ࿸ᒙ໪ࣅ0ျहဟମăྯზၫᔊၒྜྷથభܠ߈࿸ᒙ໪ࣅᎧျहဟମࡼ܈ǈBHDࡼۣߒဟମৼࢾᒋᆐ41ntăࢅᐅဉ൱యज़ມᒙखည໭ถᆐࡍࣶၫᓘ૵ᄏ൱యज़ᄋ৙ມኹăNBY:925ݧ፿ஂဏహମࡼ25፛୭UEGOॖᓤăক໭ୈਖࢾ৔ᔫᏴ.51°Dᒗ,96°D౫ᐱ଀ᆨࣞपᆍă```````````````````````````````````።፿```````````````````````````````````ᄂቶ♦ᔈࣅᐐፄ఼ᒜ)BHD*♦ྯᒬᐐፄ࿸ᒙ)51eCĂ61eCĂ71eC*♦భܠ߈໪ࣅဟମ♦భܠ߈໪ࣅᎧျह܈♦3/8Wᒗ6/6W࢟Ꮞ࢟ኹपᆍ♦ࢅࡉ41oW0√I{ࡼၒྜྷݬఠᐅဉමࣞ♦ࢅࡉ1/15&!)࢜ቯᒋ*ࡼUIE ♦ࢅ৖੒ਈࣥෝါ♦ดݝᄋ৙ࢅᐅဉ൱యज़ມᒙǈ3W♦ݧ፿ஂဏహମࡼ25፛୭UEGO!)4nn!y!4nn*ॖᓤ♦.51°Dᒗ,96°D౫ᐱ଀ᆨࣞपᆍNBY:925௥ᎌBHDਜ਼ࢅᐅဉ൱యज़ມᒙ࢟വࡼ൱యज़हࡍ໭________________________________________________________________Maxim Integrated Products 1```````````````````````````````ࢾ৪ቧᇦ`````````````````````````````````````````````````````````````````````````````````଼છౖᅄ۾ᆪဵ፞ᆪၫ௣ᓾ೯ࡼፉᆪǈᆪᒦభถࡀᏴडፉ࿟ࡼݙᓰཀྵ૞ࡇᇙăྙኊ஠ጙݛཀྵཱྀǈ༿Ᏼิࡼ࿸ଐᒦݬఠ፞ᆪᓾ೯ăᎌਈଥৃĂ৙ૡૺࢿ৪ቧᇦǈ༿ೊ൥Nbyjn዇ᒴሾ၉ᒦቦǖ21911!963!235:!)۱ᒦਪཌ*ǈ21911!263!235:!)ฉᒦਪཌ*ǈ૞षᆰNbyjnࡼᒦᆪᆀᐶǖdijob/nbyjn.jd/dpnă+ܭာᇄ໺)Qc*0९੝SpITܪᓰࡼॖᓤăU!>!௳ࡒ۞ᓤă*FQ!>!ൡ੆๤ă፛୭๼ᒙᏴၫ௣ᓾ೯ࡼᔢઁ৊߲ăၫ൩ሤ૦ၫᔊ࿳ስ૦QEB ౸ዀऐ૦Ꭵಘᇹᄻ)ಿྙǈఌ౯PL*ၷሶᄰቧᓤᒙ঱ອᒠܣቑါഺስ૦JQ࢟જ0࢟જ્ፇN B Y :925௥ᎌBHDਜ਼ࢅᐅဉ൱యज़ມᒙ࢟വࡼ൱యज़हࡍ໭ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V DD = 3.3V, SHDN = V DD , C CT = 470nF, C CG = 2μF, GAIN = V DD , T A = T MIN to T MAX , unless otherwise specified. Typical values are at T A = +25°C.) (Note 1)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.V DD to GND..............................................................-0.3V to +6V All Other Pins to GND.................................-0.3V to (V DD + 0.3V)Output Short-Circuit Duration.....................................Continuous Continuous Current (MICOUT, MICBIAS).......................±100mA All Other Pins....................................................................±20mAContinuous Power Dissipation (T A = +70°C)14-Pin TDFN-EP(derate 16.7mW/°C above +70°C)........................1481.5mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature......................................................+150°C Lead Temperature (soldering, 10s).................................+300°C Bump Temperature (soldering) Reflow............................+235°CNBY:925௥ᎌBHDਜ਼ࢅᐅဉ൱యज़ມᒙ࢟വࡼ൱యज़हࡍ໭_______________________________________________________________________________________3Note 1:Devices are production tested at T A = +25°C. Limits over temperature are guaranteed by design.Note 2:Dynamic range is calculated using the EIAJ method. The input is applied at -60dBFS (0.707μV RMS ), f IN = 1kHz.Note 3:Attack time measured as time from AGC trigger to gain reaching 90% of its final value.Note 4:CG is connected to an external DC voltage source, and adjusted until V MICOUT = 1.23V.Note 5:CG connected to GND with 2.2μF.ELECTRICAL CHARACTERISTICS (continued)(V DD = 3.3V, SHDN = V DD , C CT = 470nF, C CG = 2μF, GAIN = V DD , T A = T MIN to T MAX , unless otherwise specified. Typical values are at T = +25°C.) (Note 1)N B Y :925௥ᎌBHDਜ਼ࢅᐅဉ൱యज़ມᒙ࢟വࡼ൱యज़हࡍ໭4_______________________________________________________________________________________```````````````````````````````````````````````````````````````````````࢜ቯ৔ᔫᄂቶ(V DD = 5V, C CT = 470nF, C CG = 2.2μF, V TH = V MICBIAS x 0.4, GAIN = V DD (40dB), AGC disabled, no load, R L = 10k Ω, C OUT = 1μF,T A = +25°C, unless otherwise noted.)GAIN vs. FREQUENCYFREQUENCY (Hz)G A I N (d B )10k1k 1001020304050607080010100kPOWER-SUPPLY REJECTION RATIOvs. FREQUENCYFREQUENCY (Hz)P S R R (d B )10k1k 100-70-60-50-40-30-20-100-8010100kMICBIAS POWER-SUPPLY REJECTION RATIOvs. FREQUENCYFREQUENCY (Hz)P S R R (d B )10k1k 100-100-90-80-70-60-50-40-30-11010100kSUPPLY CURRENT vs. SUPPLY VOLTAGEM A X 9814 t o c 04SUPPLY VOLTAGE (V)S U P P L Y C U R R E N T (m A )5.55.04.04.53.53.02.62.72.82.93.03.13.23.33.43.52.52.56.0SHUTDOWN CURRENT vs. SUPPLY VOLTAGEM A X 9814 t o c 05SUPPLY VOLTAGE (V)S H U T D O W N C U R R E N T (n A )5.55.04.54.03.53.00.10.20.30.40.502.56.0MICROPHONE BIAS VOLTAGEvs. MICROPHONE BIAS SOURCE CURRENTM A X 9814 t o c 06I MICBIAS (mA)V M I C B I A S V O L T A G E (V )2520151050.51.01.52.02.50030TOTAL HARMONIC DISTORTION PLUS NOISEvs. FREQUENCYFREQUENCY (Hz)T H D +N (%)10k1k 1000.11100.0110100kTOTAL HARMONIC DISTORTION PLUS NOISEvs. OUTPUT VOLTAGEOUTPUT VOLTAGE (V RMS )T H D +N (%)1.00.50.11100.011.5INPUT-REFERRED NOISEvs. FREQUENCYFREQUENCY (kHz)I N P U T -R E F E R R E D N O I S E (μV R M S /√H z )1010.1100100.0110010001NBY:925௥ᎌBHDਜ਼ࢅᐅဉ൱యज़ມᒙ࢟വࡼ൱యज़हࡍ໭_______________________________________________________________________________________5MICBIAS NOISE vs. FREQUENCYMA X 9814 t o c 10FREQUENCY (Hz)M I C B I A S N O I S E(n V RM S /√H z )10k1k 100100100010,0001010100kSMALL-SIGNAL PULSE RESPONSE200μs/divV MICIN 10mV/div0VV MICOUT500mV/div0VTURN-ON RESPONSEM A X 9814 t o c 1220ms/divV SHDN 5V/div 0V V MICBIAS 2V/div 0VV MICOUT 1V/div 0VV OUT vs. V INV IN (mV RMS )V O U T (V R M S)100500.250.500.751.0000150V OUT vs. V INV IN (mV RMS )V O U T (V R M S)3020100.250.500.751.000040V OUT vs. V INV IN (mV RMS )V O U T (V R M S )1050.250.500.751.000015ATTACK TIME200μs/divV MICOUT 500mV/divC CT = 47nF0VATTACK TIME200μs/divV MICOUT 500mV/div0VHOLD AND RELEASE TIME20ms/divV MICOUT 500mV/divC CT = 47nF A/R = GND0V``````````````````````````````````````````````````````````````````````࢜ቯ৔ᔫᄂቶ)ኚ*(V DD = 5V, C CT = 470nF, C CG = 2.2μF, V TH = V MICBIAS x 0.4, GAIN = V DD (40dB), AGC disabled, no load, R L = 10k Ω, C OUT = 1μF,T A = +25°C, unless otherwise noted.)N B Y :925௥ᎌBHDਜ਼ࢅᐅဉ൱యज़ມᒙ࢟വࡼ൱యज़हࡍ໭6_______________________________________________________________________________________HOLD AND RELEASE TIME40ms/divV MICOUT 500mV/div0VHOLD AND RELEASE TIME100ms/divV MICOUT 500mV/div0V```````````````````````````````````````````````````````````````````````````````፛୭ႁී``````````````````````````````````````````````````````````````````````࢜ቯ৔ᔫᄂቶ)ኚ*(V DD = 5V, C CT = 470nF, C CG = 2.2μF, V TH = V MICBIAS x 0.4, GAIN = V DD (40dB), AGC disabled, no load, R L = 10k Ω, C OUT = 1μF,T A = +25°C, unless otherwise noted.)NBY:925௥ᎌBHDਜ਼ࢅᐅဉ൱యज़ມᒙ࢟വࡼ൱యज़हࡍ໭_______________________________________________________________________________________7MAX9814 AGC DISABLED400μs/div V MICIN 100mV/divV MICOUT(AC-COUPLED)1V/divMAX9814 fig01aMAX9814 AGC ENABLED400μs/divV MICIN 100mV/divV MICOUT(AC-COUPLED)1V/divMAX9814 fig01b0V0V0V0V```````````````````````````````ሮᇼႁීNBY:925ဵጙ౒ࢅ߅۾Ă঱ອᒠ൱యज़हࡍ໭ǈดᒙᔈࣅᐐፄ఼ᒜ)BHD*ጲૺࢅᐅဉ൱యज़ມᒙăNBY:925ဵᎅࢅᐅဉ༄ᒙहࡍ໭Ăభܤᐐፄहࡍ໭)WHB*Ăၒ߲हࡍ໭Ă൱యज़ມᒙखည໭ጲૺBHD఼ᒜ࢟വࢀࣶৈݙᄴ࢟വᔝ߅ăดݝ൱యज़ມᒙखည໭ᄋ৙3Wࡼມኹǈး፿᎖ࡍࣶၫᓘ૵ᄏ࢟ྏါ൱యज़ăNBY:925ॊᆐྯ଀ǈ࣪ၒྜྷ஠ቲहࡍăᏴ࢒ጙ଀ǈၒྜྷᄰਭᐐፄᆐ23eCࡼࢅᐅဉ༄ᒙहࡍ໭஠ቲદߡਜ਼हࡍǗ࢒औ଀ᐌᎅBHD఼ᒜࡼWHBᔝ߅ǈWHB0BHDᔝ੝ถ৫ဧᐐፄᏴ31eCᎧ1eCᒄମܤછǗၒ߲हࡍ໭ဵᔢઁጙ଀ǈ௥ᎌ9eCĂ29eCĂ31eCྯৈݙᄴࡼৼࢾᐐፄǈభᄰਭጙৈྯზ൝૷ၒྜྷܠ߈࿸ᒙăBHDᇄኹჁဟǈNBY:925ถ৫ᄋ৙51eCĂ61eC૞71eCࡼᐐፄăᔈࣅᐐፄ఼ᒜ)BHD*ݙ௥۸BHDࡼ໭ୈᏴၒྜྷᐐፄਭࡍဟǈၒ߲୓્߲ሚሻ݆ǗऎᏴၒྜྷᐐፄਭࡍဟǈBHDถ৫ܜ඾ၒ߲ሻ݆ăᅄ2Ⴥာᆐᐐፄਭࡍࡼ൱యज़ၒྜྷᏴ௥ᎌBHDਜ਼ݙࡒBHDࡼ༽ౚሆࡼ܈୷ăNBY:925ࡼBHD࣪ᐐፄ஠ቲ఼ᒜǈ၅ሌଶހၒ߲࢟ኹဵ॥ިਭᎾ࿸ඡሢăႲઁǈᄰਭభኡࡼဟମޟၫଢ଼ࢅ൱యज़हࡍ໭ᐐፄǈጲኀᑵਭࡍࡼၒ߲࢟ኹ७ᒋăᑚጙਭ߈߂ᆐ໪ࣅဟମăࡩၒ߲ቧ੓७ᒋଢ଼ࢅઁǈᐐፄᏴ੪࣢ဟମดۣߒၱିᓨზǈႲઁၒ߲ቧ੓દൻᐐଝࡵᑵޟᒋăকਭ߈߂ᆐۣߒਜ਼ျहဟମăहࡍ໭ࢯஂၒྜྷቧ੓ࡼႥࣞᎅᅪݝࢾဟ࢟ྏD DU ਜ਼B0S࣡࢟ኹ࿸ᒙăBHDඡሢభᄰਭW UI ࢯஂăᐐፄၱି೟ᆐၒྜྷቧ੓७ᒋࡼ਽ၫǈᔢࡍBHDၱିᆐ31eCăᅄ3৊߲೫ၒྜྷᅃ཭ި߲Ꮎ࿸ඡሢဟǈ࣪ၒ߲໪ࣅဟମĂۣߒဟମਜ਼ျहဟମࡼ፬ሰăྙਫ๼ᒙࡼ໪ࣅဟମਜ਼ျहဟମሰ።ვ౐ǈᐐፄႲቧ੓ࣅზܤછऎ౐Ⴅࢯஂǈޟޟ્ޘညಢ႒Đກ཭đဉ)qvnqjoh*૞Đࠇᇦđဉ)csfbuijoh*ࡼፒຫᐅဉăࢯஂBHDࡼဟମޟၫဧ໚ᎧဉᏎປ๼ǈ࠭ऎࡉࡵᔢଛ቉ਫă࣪᎖กቋጲDEፒಘᆐᓍገፒᏎࡼ።፿౶ႁǈᅎୀ໪ࣅဟମᆐ271μtǈျहဟମᆐ91ntăᄰޟ༽ౚሆǈፒಘ݃ह࿸۸ገ܈Ꭻፒ૞࢟፬ࢀ࿸۸ኊገৎ࣢ࡼျहဟମăᅄ2/!ࡒᎌBHDਜ਼඗ᎌBHDࡼ൱యज़ၒྜྷ໪ࣅဟମ໪ࣅဟମဵᒎࡩၒྜྷቧ੓ިਭඡሢ࢟ຳઁǈBHDଢ଼ࢅᐐፄჅኊࡼဟମăᐐፄᏴ໪ࣅဟମดጲᒎၫተါၱିǈࢾፃᆐጙৈဟମޟၫăকဟମޟၫᆐ3511y D DU ෇)໚ᒦD DU ဵᅪݝࢾဟ࢟ྏ*ǖ•ኡན୷࣢ࡼ໪ࣅဟମǈጲۣᑺBHD౐Ⴅሰ።ၾზቧ੓ǈಿྙૣ৴ဉ)ፒಘ*૞།ૣဉ)EWE*ă•ኡ፿୷ޠࡼ໪ࣅဟମǈBHD୓઄൒ၾဟख़ᒋǈᒑᎌࡩဉሰීመᐐଝဟݣଢ଼ࢅᐐፄăၾဟख़ᒋ݀ݙۻၱିǈࡣ୷ሰࡼဉፒ୓ۻၱିăᑚዹభ࠭ፒ೟࿟ଢ଼ࢅሰဉǈဧࣅზपᆍᔢࡍછăۣߒဟମۣߒဟମဵᒎቧ੓ଢ଼ࡵඡሢጲሆĂျहਭ߈ఎဪጲ༄ࡼዓߕăۣߒဟମดݝ࿸ᒙᆐ41ntǈ݀༦ݙభࢯăࡩቧ੓ިਭඡሢǈᒮቤ஠ྜྷ໪ࣅ୿ࣤဟǈۣߒဟମᒫᒏăျहဟମျहဟମဵᒎቧ੓ࢰൢᒗඡሢጲሆǈ݀༦ளਭ41ntࡼۣߒဟମᒄઁǈᐐፄૄࡵ໚ᑵޟၺຳჅኊࡼဟମăျहဟମࢾፃᆐࡩၒྜྷቧ੓ࢰൢᒗUIඡሢጲሆǈ݀༦ளਭ41nt ࡼۣߒဟମᒄઁǈᐐፄ࠭31eCኹჁျहࡵᑵޟᐐፄࡼ21&ࡼဟମăျहဟମభࢯǈ໚ᔢቃᒋᆐ36ntăျहဟମᎅD DU ࿸ᒙࡼ໪ࣅဟମጲૺಽ፿B0S )ྙܭ2Ⴥာ*࿸ᒙࡼ໪ࣅ0ျहဟମ܈ཀྵࢾǖ•ݧ፿ቃ܈ᒋǈဧBHDࡼႥࣞࡉࡵᔢࡍă•ݧ፿ࡍ܈ᒋǈဧፒᒠࡉࡵᔢଛǈऴᒏBHDᒮআࢯஂ࣢ဟମดި߲ඡሢࡼቧ੓ăBHDၒ߲ඡሢ૮૚BHD৔ᔫࡼၒ߲ඡሢభᄰਭᅪݝ࢟ᔜॊኹ໭ࢯஂăᅲ߅࣪ॊኹ໭ࡼ࿸ᒙઁǈBHD୓ଢ଼ࢅᐐፄǈဧၒ߲࢟ኹᎧUIၒྜྷ࣡࿸ᒙࡼ࢟ኹሤປ๼ă൱యज़ມᒙNBY:925ᎅดݝᄋ৙ࢅᐅဉ൱యज़ມᒙ࢟ኹǈభདࣅࡍࣶၫᓘ૵ᄏ࢟ྏါ൱యज़ăࢯஂ൱యज़ມᒙᒗ3Wǈጲۣᑺ஠ྜྷࢅᐅဉ༄ᒙहࡍ໭ࡼၒྜྷቧ੓ݙۻὥᆡࡵ࢐ă```````````````````````````````።፿ቧᇦ࿸ᒙ໪ࣅဟମਜ਼ျहဟମ໪ࣅဟମਜ਼ျहဟମॊܰᎅDUਜ਼HOEᒄମࡼ࢟ྏጲૺB0Sࡼ൝૷ᓨზ)ܭ2*௼ࢾăB0Sᆐྯზ൝૷ၒྜྷǈభ࿸ᒙ໪ࣅᎧျहဟମ܈ăো௣ܭ3Ⴥ೰ࡼሤ።࢟ྏǈభጲኡᐋ໪ࣅဟମਜ਼ျहဟମăN B Y :925௥ᎌBHDਜ਼ࢅᐅဉ൱యज़ມᒙ࢟വࡼ൱యज़हࡍ໭8_______________________________________________________________________________________10ms/divATTACKRELEASEHOLDᅄ3/!ၒྜྷᅃ཭ިਭBHDඡሢܭ2/!໪ࣅᎧျह܈ܭ3/!໪ࣅ.ျहဟମ࿸ᒙBHDඡሢྦገ࿸ᒙ൱యज़ၒ߲ὥᆡဟࡼၒ߲࢟ኹඡሢǈ።ᏴNJDCJBTਜ਼࢐ᒄମೌ୻ᅪݝ࢟ᔜॊኹ໭ǈ࢟ᔜॊኹ໭ၒ߲ೌ୻ࡵUIă࢟ኹW UIభཀྵࢾၒ߲ὥᆡဟࡼख़ᒋ࢟ኹඡሢăࠥဟǈၒ߲࣡ࡼᔢࡍቧ੓ڼ७ᆐW UIࡼ3۶ǈۣ݀ߒݙܤǈᒇࡵၒྜྷቧ੓७ᒋၱିᆐᒏăྦገணᒏBHDǈభ୓UIೌ୻ᒗNJDCJBTă൱యज़ມᒙ࢟ᔜNJDCJBTభᏎ߲31nBࡼ࢟ഗăኡᐋးࡩࡼS NJDCJBTǈ࠭ऎᆐᓘ૵ᄏ൱యज़ᄋ৙Ⴥኊገࡼມᒙ࢟ഗăጙۅ౶ႁǈ3/3lΩࡼᔜᒋ࣪᎖࢜ቯഉැࣞࡼ൱యज़ጯளᔗ৫೫ăਈ᎖ມᒙ࢟ᔜࡼኡᐋǈ༿ݬఠ൱యज़ၫ௣ᓾ೯ăມᒙ࢟ྏNBY:925ࡼCJBTၒ߲Ᏼดݝளਭદߡǈᄋ৙ࢅᐅဉມኹăݧ፿ጙᒑ581oGࡼ࢟ྏ୓CJBT๬വᒗ࢐ăၒྜྷ࢟ྏ൱యज़हࡍ໭ࡼၒྜྷୣഗẮ੝࢟ྏ)D JO*ਜ਼ၒྜྷᔜఝ)S JO*ᔝ߅೫ጙৈ঱ᄰ൉݆໭ǈభ൉߹ၒྜྷቧ੓ᒦࡼჅᎌᒇഗມᒙ)ݬ୅࢜ቯ።፿࢟വ0৖ถౖᅄ*ăD JOభऴᒏၒྜྷቧ੓Ꮞࡼᒇഗ߅ॊ߲ሚᏴहࡍ໭ࡼၒ߲ăଣ࿸ၒྜྷቧ੓Ꮞᔜఝᆐഃǈᐌ঱ᄰ൉݆໭ࡼ.4eC࢛ᆐǖኡᐋးࡩࡼD JOဧg.4eC`JOᏐࢅ᎖ැঢຫൈăg.4eC`JO࿸ᒙਭ঱ǈ્፬ሰहࡍ໭ࡼࢅຫሰ።ǈኡᐋࢅ࢟ኹᇹၫࡼ࢟஑ᒠ࢟ྏă࣪᎖ୣഗẮ੝࢟ྏ౶ႁǈി࢟ஊ࢟ྏĂᶉ࢟ྏ૞ۡෞ࢟஑ᒠ࢟ྏ࣒ဵ੪ੑࡼኡᐋă঱࢟ኹᇹၫࡼ࢟ྏǈᓄྙჿࠣ࢟ྏ)ऻD1H࢟஑ᒠ*ǈ્ଝ௭ࢅຫပᑞăၒ߲࢟ྏNBY:925ࡼၒ߲ມᒙᏴ2/34Wǈྦገሿ߹ᒇഗပࢯǈ።ݧ፿ୣഗẮ੝࢟ྏ)D PVU*ăఠ൅ࡵሆጙ଀ࡼၒྜྷᔜఝ)S M*ǈD PVUਜ਼S Mᔝ߅঱ᄰ൉݆໭ăଣ࿸ၒ߲ᔜఝᆐഃǈ঱ᄰ൉݆໭ࡼ.4eC࢛ᆐǖਈࣥNBY:925௥ᎌࢅ৖੒ਈࣥෝါăࡩSHDNᆐࢅ࢟ຳဟǈ࢟Ꮞ࢟ഗࢰൢᒗ1/12μBǈၒ߲஠ྜྷ঱ᔜᓨზǈ൱యज़ࡼມᒙ࢟ഗਈࣥăདࣅSHDNᆐ঱࢟ຳǈဧถहࡍ໭ă༿ᇖ୓SHDNኞహă࢟Ꮞ๬വᎧQDCݚ௜ݧ፿ጙᒑ1/2μGࡼ࢟ྏ୓࢟Ꮞ๬വᒗ࢐ăჁ࣢፛ሣޠࣞభଢ଼ࢅ଎ည࢟ྏǈᅪݝᏄୈ።஧భถణத໭ୈहᒙǈᅎୀኡ፿ܭᄣᏄୈăᏴᄴဟ௥ᎌෝผ࢐ਜ਼ၫᔊ࢐ࡼᇹᄻᒦǈNBY:925ࡼ࢐Ꭷෝผ࢐ሤೌăNBY:925௥ᎌBHDਜ਼ࢅᐅဉ൱యज़ມᒙ࢟വࡼ൱యज़हࡍ໭_______________________________________________________________________________________9N B Y :925௥ᎌBHDਜ਼ࢅᐅဉ൱యज़ມᒙ࢟വࡼ൱యज़हࡍ໭10______________________________________________________________________________________```````````````````````````````````````````````````````````````````࢜ቯ።፿࢟വ0৖ถౖᅄNBY:925൱యज़हࡍ໭______________________________________________________________________________________11`````````````````````````````````በຢቧᇦPROCESS: BiCMOS`````````````````````````````````፛୭๼ᒙN B Y :925൱యज़हࡍ໭12______________________________________________________________________________________`````````````````````````````````````````````````````````````````````````````ॖᓤቧᇦྙኊᔢதࡼॖᓤᅪተቧᇦਜ਼੆๤ݚ௜ǈ༿އኯ/packages ăNBY:925൱యज़हࡍ໭______________________________________________________________________________________13````````````````````````````````````````````````````````````````````````````````ॖᓤቧᇦ)ኚ*ྙኊᔢதࡼॖᓤᅪተቧᇦਜ਼੆๤ݚ௜ǈ༿އኯ/packages ăN B Y :925൱యज़हࡍ໭````````````````````````````````````````````````````````````````````````````ኀࢿ಼ဥNbyjnݙ࣪Nbyjnޘອጲᅪࡼྀੜ࢟വဧ፿ঌᐊǈጐݙᄋ৙໚ᓜಽ኏భăNbyjnۣഔᏴྀੜဟମĂ඗ᎌྀੜᄰۨࡼ༄ᄋሆኀখޘອᓾ೯ਜ਼ਖৃࡼཚಽă14____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2009 Maxim Integrated ProductsNbyjn ဵNbyjn!Joufhsbufe!Qspevdut-!Jod/ࡼᓖݿ࿜ܪăNbyjn ۱யێူࠀ۱ய9439ቧረᎆᑶܠ൩211194඾ॅ࢟જǖ911!921!1421࢟જǖ121.732262::ࠅᑞǖ121.732263::。

MAX4638EUE中文资料

General DescriptionThe MAX4638/MAX4639 are single 8:1 and dual 4:1CMOS analog multiplexers/demultiplexers (muxes/demuxes). Each mux operates from a single +1.8V to +5V supply or dual ±2.5V supplies. These devices fea-ture 3.5Ωon-resistance (R ON ) when powered with a single +5V supply and have -75dB of off-isolation and -85dB crosstalk from the output to each off channel.The switching times are 18ns t ON and 7ns t OFF . They feature a -3dB 85MHz bandwidth and a guaranteed 0.25nA leakage current at +25°C.A +1.8V to +5.5V operating range makes the MAX4638/MAX4639 ideal for battery-powered, portable instru-ments. All channels guarantee break-before-make switching. These parts feature bidirectional operation and can handle Rail-to-Rail ®analog signals. All control inputs are TTL/CMOS-logic compatible. Decoding is in standard BCD format, and an enable input is provided to simplify cascading of devices. These devices are avail-able in small 16-pin QFN, TSSOP and SOIC packages,as well as a 20-pin QFN package.ApplicationsAutomatic Test EquipmentLow-Voltage Data-Acquisition Systems Audio and Video Signal Routing Medical Equipment Battery-Powered Equipment Relay ReplacementFeatureso Guaranteed R ON3.5Ω(+5V or ±2.5V Supplies)6Ω(+3V Supply)o Guaranteed 0.4ΩR ON Match Between Channels o Guaranteed 1ΩR ON Flatness Over Signal Range o Guaranteed Low Leakage Currents0.25nA at +25°Co Switching Times: t ON =18ns, t OFF = 7ns o +1.8V to +5.5V Single-Supply Operation ±2.5V Dual-Supply Operation o Rail-to-Rail Signal Handling o TTL/CMOS-Logic Compatible o Crosstalk: -80dB (1MHz)o Off-Isolation: -60dB (10MHz)MAX4638/MAX46393.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers________________________________________________________________Maxim Integrated Products 119-1782; Rev 1; 3/02Ordering InformationRail-to-Rail is a Registered Trademark of Nippon Motorola, Ltd.Pin Configurations/Functional DiagramsFor pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .Ordering Information continued at end of data sheet.M A X 4638/M A X 46393.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog MultiplexersABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS—+5V Single Supply(V+ = +5V ±10%, V- = 0, V IH = +2.4V, V IL = +0.8V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.(Voltages Referenced to GND)V+ to V- .................................................................................+6V V+, A_, EN ...............................................................-0.3V to +6V V- ............................................................................+0.3V to -6V NO_, COM_ (Note1)....................................-0.3V to (V+ + 0.3V)Continuous Current A_, EN .............................................±30mA Continuous Current NO_, COM_ ..................................±100mA Peak Current (NO_, COM_)(pulsed at 1ms, 10% duty cycle) ..............................±200mAContinuous Power Dissipation (T A = +70°C)16-Pin QFN (derate 18.5mW/°C above +70°C)........1481mW 16-Pin TSSOP (derate 5.7mW/°C above +70°C)........457mW 16-Pin SO (derate 8.70mW/°C above +70°C) ............696mW 20-Pin QFN (derate 20mW/°C above +70°C)..........1600mW Operating Temperature RangeMAX463_E_ E ...............................................-40°C to +85°C Junction Temperature......................................................+150°C Storage Temperature Range ...........................-65°C to +150°C Lead Temperature (soldering, 10s) ...............................+300°CNote 1:Signals on COM_, NO_ exceeding V+ or V- are clamped by internal diodes. A_ and EN are clamped only to V- and canexceed V+ up to their maximum ratings. Limit forward-diode current to maximum current rating.MAX4638/MAX46393.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS —+5V Single Supply (continued)(V+ = +5V ±10%, V- = 0, V IH = +2.4V, V IL = +0.8V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)M A X 4638/M A X 46393.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers 4_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS —+3.0V Single Supply(V+ = +2.7V to +3.3V, V- = 0, V IH = +2.0V, V IL = +0.4V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V+ = +3V and T A = +25°C.)MAX4638/MAX46393.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog MultiplexersELECTRICAL CHARACTERISTICS —+3.0V Single Supply (continued)(V+ = +2.7V to +3.3V, V- = 0, V IH = +2.0V, V IL = +0.4V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V+ = +3V and T A = +25°C.)ELECTRICAL CHARACTERISTICS —±2.5V Dual Supplies(V+ = +2.5 ±10%, V- = -2.5V ±10%, V IH = +2.0V, V IL = +0.4V, T A =T MIN to T MAX , unless otherwise noted. Typical values are at V±= ±2.5V and T A = +25°C.)M A X 4638/M A X 46393.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog MultiplexersELECTRICAL CHARACTERISTICS —±2.5V Dual Supplies (continued)(V+ = +2.5 ±10%, V- = -2.5V ±10%, V IH = +2.0V, V IL = +0.4V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V±= ±2.5V and T A = +25°C.)Note 3:∆R ON = R ON(MAX)- R ON(MIN).Note 4:Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over thespecified analog signal ranges.Note 5:Guaranteed by design.Note 6:Off-Isolation = 20log 10(V COM_/ V NO_), V COM_= output, V NO_= input to off switch.Note 7:Between any two switches.Note 8:∆R ON matching specifications for QFN packaged parts are guaranteed by design.6______________________________________________________________________________________MAX4638/MAX46393.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers_______________________________________________________________________________________705101520252.0 2.51.0 1.50.53.0 3.54.0 4.55.0ON-RESISTANCE vs. V COMV COM (V)R O N (Ω)01.00.51.53.03.52.52.04.001.0 1.52.0 2.50.53.0 3.54.0 4.55.0ON-RESISTANCE vs. V COM ANDTEMPERATUREV COM (V)R 0N (Ω)2143560 1.0 1.50.5 2.0 2.5 3.0ON-RESISTANCE vs. V COM ANDTEMPERATUREV COM (V)R O N (Ω)60100801401201801602001.0 3.02.0 4.0 5.01.5 3.52.5 4.5 5.5 6.0SUPPLY CURRENT vs. SUPPLY VOLTAGEM A X 4638 t o c 04SUPPLY VOLTAGE (V)S U P P L Y C U R RE N T (p A )6428101214161820-2.5-0.51.5 3.5CHARGE INJECTION vs. V COMV COM (V)C H A R G E (p C )5.51010.10.010.001-4010-15356085SUPPLY CURRENT vs. TEMPERATUREM A X 463 t o c 06TEMPERATURE (°C)S U P P L Y C U R R E N T (n A )0.60.81.01.21.41.61.81.82.82.33.33.84.34.85.3LOGIC LEVEL THRESHOLD vs.SUPPLY VOLTAGE AND TEMPERATURESUPPLY VOLTAGE (V)L O G I C V O L T A G E (V )0105252015403530451.53.03.52.02.54.04.55.05.5ENABLE TURN-ON/TURN-OFF TIMEvs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)T I M E (n s)246810121416-40-1510356085ENABLE TURN-ON/TURN-OFF TIMEvs. TEMPERATURETEMPERATURE (°C)T I M E (n s )Typical Operating Characteristics(V+ = +5V, V- = 0, T A = +25°C, unless otherwise noted.)M A X 4638/M A X 46393.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers -120-80-100-40-600-200.0110.1101001000FREQUENCY RESPONSEFREQUENCY (MHz)R E S P O N S E (d B )0.010.00110.1100101000-40-2020408060ON/OFF-LEAKAGE CURRENTvs. TEMPERATURETEMPERATURE (°C)L E A K A G E C U R R E N T (p A)0.020.060.040.080.10TOTAL HARMONIC DISTORTIONvs. FREQUENCYFREQUENCY (kHz)T H D (%)0.0110.110100Pin DescriptionTypical Operating Characteristics (continued)(V+ = +5V, V- = 0, T A = +25°C, unless otherwise noted.)MAX4638/MAX46393.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers_______________________________________________________________________________________9Detailed DescriptionThe MAX4638/MAX4639 are low-voltage, CMOS analog muxes. The MAX4638 is an 8:1 mux that switches one of eight inputs (NO1–NO8) to a common output (COM)as determined by the 3-bit binary inputs A0, A1, and A2. The MAX4639 is a 4:1 dual mux that switches one of four differential inputs to a common differential out-put as determined by the 2-bit binary inputs A0 and A1.Both the MAX4638/MAX4639 have an EN input that can be used to enable or disable the device. When dis-abled, all channels are switched off. See Truth Tables.Applications InformationOvervoltage ProtectionProper power-supply sequencing is recommended for all CMOS devices. Do not exceed the absolute maxi-mum ratings because stresses beyond the listed rat-ings can cause permanent damage to the devices.Always sequence V+ on first, then V-, followed by the logic inputs. I f power-supply sequencing is not possi-ble, add two small-signal diodes (D1, D2) in series with the supply pins for overvoltage protection (Figure 1).Adding diodes reduces the analog signal range to one diode drop below V+ and one diode drop above V-, but does not affect the devices ’ low switch resistance.Device operation is unchanged, and the difference between V+ and V- should not exceed 6V. These pro-tection diodes are not recommended when using a sin-gle supply. For single-supply operation, V- should be connected to GND as close to the device as possible.MAX4638 (Single 8-to-1 Mux)MAX4639 (Dual 4-to-1 Mux)Truth TablesOrdering Information (continued)M A X 4638/M A X 46393.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers 10______________________________________________________________________________________Test Circuits/Timing DiagramsMAX4638/MAX4639Low-Voltage Analog Multiplexers______________________________________________________________________________________11Figure 5. Charge InjectionTest Circuits/Timing Diagrams (continued)M A X 4638/M A X 4639Low-Voltage Analog Multiplexers 12______________________________________________________________________________________Figure 7. CrosstalkFigure 8. Channel OFF/ON CapacitanceTest Circuits/Timing Diagrams (continued)Chip InformationTRANSISTOR COUNT: 632Figure 6. Off-Isolation/On-Channel BandwidthMAX4638/MAX4639Low-Voltage Analog Multiplexers______________________________________________________________________________________13Pin Configurations (continued)M A X 4638/M A X 4639Low-Voltage Analog Multiplexers 14______________________________________________________________________________________Package Information(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)MAX4638/MAX4639Low-Voltage Analog MultiplexersMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600_____________________15©2002 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)。

MAX9693中文资料

Pin Configurations appear at end of data sheet.
_________________________________________________________Functional Diagrams
IN+
INRL
MAX9691
Q OUT Q OUT
NONINVERTING INPUT
Selector Guide
PART MAX9691
COMPARATORS LATCH PINPER PACKAGE ENABLE PACKAGE
1
No
8 µMAX,
8 SO, 8 PDIP
MAX9692
1
MAX9693
2
Yes 10 µMAX, 16 SO, 16 PDIP
16 QSOP, Yes 16 SO, 16 PDIP
The MAX9691/MAX9692/MAX9693 have differential inputs and complementary outputs that are fully compatible with ECL-logic levels. Output current levels are capable of driving 50Ω terminated transmission lines. The ultra-fast operation makes signal processing possible at frequencies in excess of 600MHz.
These devices are available in SO, QSOP, and tiny µMAX packages for added space savings.

MAX1978中文数据手册

用于Peltier模块的集成温度控制器概论MAX1978 / MAX1979是用于Peltier热电冷却器（TEC）模块的最小, 最安全, 最精确完整的单芯片温度控制器。

片上功率FET和热控制环路电路可最大限度地减少外部元件, 同时保持高效率。

可选择的500kHz / 1MHz开关频率和独特的纹波消除方案可优化元件尺寸和效率, 同时降低噪声。

内部MOSFET的开关速度经过优化, 可降低噪声和EMI。

超低漂移斩波放大器可保持±0.001°C的温度稳定性。

直接控制输出电流而不是电压, 以消除电流浪涌。

独立的加热和冷却电流和电压限制提供最高水平的TEC保护。

MAX1978采用单电源供电, 通过在两个同步降压调节器的输出之间偏置TEC, 提供双极性±3A输出。

真正的双极性操作控制温度, 在低负载电流下没有“死区”或其他非线性。

当设定点非常接近自然操作点时, 控制系统不会捕获, 其中仅需要少量的加热或冷却。

模拟控制信号精确设置TEC 电流。

MAX1979提供高达6A的单极性输出。

提供斩波稳定的仪表放大器和高精度积分放大器, 以创建比例积分（PI）或比例积分微分（PID）控制器。

仪表放大器可以连接外部NTC或PTC热敏电阻, 热电偶或半导体温度传感器。

提供模拟输出以监控TEC温度和电流。

此外, 单独的过热和欠温输出表明当TEC温度超出范围时。

片上电压基准为热敏电阻桥提供偏置。

MAX1978 / MAX1979采用薄型48引脚薄型QFN-EP 封装, 工作在-40°C至+ 85°C温度范围。

采用外露金属焊盘的耐热增强型QFN-EP封装可最大限度地降低工作结温。

评估套件可用于加速设计。

应用光纤激光模块典型工作电路出现在数据手册的最后。

WDM, DWDM激光二极管温度控制光纤网络设备EDFA光放大器电信光纤接口ATE特征♦尺寸最小, 最安全, 最精确完整的单芯片控制器♦片上功率MOSFET-无外部FET♦电路占用面积<0.93in2♦回路高度<3mm♦温度稳定性为0.001°C♦集成精密积分器和斩波稳定运算放大器♦精确, 独立的加热和冷却电流限制♦通过直接控制TEC电流消除浪涌♦可调节差分TEC电压限制♦低纹波和低噪声设计♦TEC电流监视器♦温度监控器♦过温和欠温警报♦双极性±3A输出电流（MAX1978）♦单极性+ 6A输出电流（MAX1979）订购信息* EP =裸焊盘。

MAXIM MAX038 Evaluation Kit 数据手册

Evaluates: MAX038MAX038 Evaluation Kit________________________________________________________________Maxim Integrated Products 1_______________General DescriptionThe MAX038 evaluation kit (EV kit) is a high-frequency function generator capable of producing accurate tri-angle/sawtooth, sine, and square/pulse waveforms up to 10MHz, using the supplied components. Output fre-quency and duty cycle are easily adjusted with on-board potentiometers. Removable jumpers select sine,square, or triangle waveforms, or fix the duty cycle at 50%. The output is buffered with a MAX442 amplifier capable of driving a 50Ωcoaxial cable. The MAX038EV kit is fully assembled and tested.___________________________Featureso 325kHz to 10MHz Operation o Adjustable Duty Cycle o 2.5V Reference Output o TTL-Compatible SYNC Output o Fully Assembled and Tested____________________Component List_________________________Quick StartThe MAX038 EV kit is a fully assembled and tested board. Follow these steps to verify board operation. Do not turn on the power supply until all connections are completed.1)Connect a +5V supply to the pad marked +5V.Connect a -5V supply to the pad marked -5V.Connect ground(s) to the GND pad.2)Connect an oscilloscope to the BNC jack markedOUTPUT through a terminated 50Ωcable. The MAX038 output prior to the amplifier stage may also be monitored using an oscilloscope probe at the OUT pad. 3)Place the shunt across pins 2 and 3 of JU4 for 50%duty cycle. Place the shunt across pins 1 and 2 of______________Ordering Information______________________________EV KitFor free samples & the latest literature: , or phone 1-800-998-8800.For small orders, phone 408-737-7600 ext. 3468.查询MAX038EVKIT供应商JU3 to allow the frequency to be adjusted. Verify that there is a shunt on JU5.4)Verify the shunts on JU1 and JU2 for a square-waveoutput. Refer to Table 1 for alternate waveform selections.5)Apply power and verify the output waveform._______________Detailed DescriptionWaveform SelectionTo select the desired output waveform, place shunts across JU1 and JU2 in the combinations shown in Table 1. These jumpers set address pins A0 and A1 to TTL/CMOS-logic levels. External control may be initiat-ed by connecting an external source to the A0 and A1 pads and removing the shunts on JU1 and JU2.Note that there are 10k Ωpull-up resistors to +5V on the A0 and A1 address lines.* Note: Frequency pre-set by oscillator capacitor (C1) and inputcurrent (position of R3) as specified by formula [1].Output FrequencyThe output frequency is controlled by the oscillator capacitor (C1), the current injected into the IIN pin, and the voltage on the FADJ pin. The EV kit allows indepen-dent adjustment of both input current (R3) and FADJ voltage (R2). Refer to the Detailed Description section of the MAX038 data sheet for additional theory of oper-ation.Input Current ControlThe current injected into the IIN pin acts as the primary frequency-adjustment control. The R3 potentiometer varies the current to the MAX038’s IIN pin. The input current can be easily monitored by removing the JU5shunt and placing a current meter across the JU5 pins.The components supplied on the EV kit will allow an input current range of 50µA to 725µA. With the VADJ pin grounded, the fundamental output frequency (F o ) is as follows:F o (MHz) = I IN (µA) ÷C OSC (pF) [1]where: I IN = current injected into IIN= V REF ÷(R3 + R12)= 2.5V ÷(0k Ωto 50k Ω+ 3.3k Ω)C OSC = external oscillator capacitor (C1)To use an external input current, connect the external current source to the IIN pad and remove the JU5 shunt completely. Note that there is a 3.3k Ωresistor in series with the device IIN pin.FADJ ControlVarying the FADJ voltage will also vary the output fre-quency. With a shunt across pins 1 and 2 of JU3, the R2 potentiometer will vary the voltage applied to the FADJ pin. With the JU3 shunt on pins 2 and 3, the FADJ pin is grounded. Grounding the FADJ pin sets the out-put to the fundamental output frequency (F o ), as given by equation [1].To use an external FADJ voltage, connect the external source to the FADJ pad and remove the JU3 shunt completely. Limit the external FADJ voltage to ±2.4V.Duty-Cycle ControlThe voltage on the DADJ pin controls the duty cycle of the output waveform. With the JU4 shunt on pins 1 and 2,the R1 potentiometer will vary the voltage applied to the DADJ pin, thus varying the duty cycle 15% to 85%. With the JU4 shunt on pins 2 and 3, the DADJ pin is grounded.Grounding the DADJ pin fixes the duty cycle at 50%.To use an external DADJ voltage, connect the external voltage source to the DADJ pad and remove the JU4shunt completely. Limit the external DADJ voltage to ±2.3V.E v a l u a t e s : M A X 038MAX038 Evaluation Kit 2_______________________________________________________________________________________Output Buffer The MAX038 output amplitude is fixed at 2V p-p. The MAX038 output is capable of driving a capacitive load up to 90pF. The MAX442 amplifier buffers the MAX038 output to a 50Ωcoaxial cable. The MAX442 is set at a gain of 2V/V, so that the output amplitude remains 1V/V after the 50Ωback termination. The EV kit’s OUT pad provides access to the output of the MAX038 prior to the MAX442 buffer stage. The MAX442 output connects to the BNC connector through a 50Ωresistor to back terminate a 50Ωcoaxial cable. When a terminated 50Ωcable is connected, this resistor forms a voltage divider with the load impedance, which attenuates the signal by one-half. The MAX442 is operated with a 2V/V closed-loop gain to provide unity gain at the 50Ωcable’s output.The MAX442 is actually a 2-channel amplifier. A built-in multiplexer allows either of two input signals to be selected. TTL-level address pin A0 selects either IN0 or IN1. The MAX038 output is connected to MAX442 input IN0. IN1 is unused and connected to ground; it may be used by cutting the JU7 trace, thus discon-necting IN1 from ground. Likewise, the MAX442 address pin A0 can be disconnected from ground by cutting the JU8 trace. Pull up A0 to +5V to select IN1. See the MAX442 data sheet for additional operation details.Reference Voltage The MAX038 includes a 2.5V bandgap reference capa-ble of sourcing 4mA and sinking 100µA. Access to the reference voltage is provided at the REF pad. The ref-erence voltage is primarily used to provide stable cur-rent to IIN and to bias DADJ and FADJ.Extending the OutputFrequency RangeThe components supplied with the EV kit allow an out-put frequency range of 325kHz to 10MHz. The frequen-cy range is controlled primarily by the oscillator capaci-tor (C1) and the input current, which is a function of the reference voltage and potentiometer R3. The resulting frequency range can be shifted up or down dependingon the value of C1. Refer to the Output Frequency vs.Input Current graph which appears in the Typical Operating Characteristics of the MAX038 data sheet.The upper end of the range can be extended by reduc-ing C1. The lower end of the range can be reduced by increasing the value of C1. Take care when selecting alternate capacitors if stable operation over tempera-ture is desired. Ceramic capacitors with low tempera-ture coefficients give the best results. Refer to the Selecting Resistors and Capacitors section of theMAX038 data sheet for further details.Sync Outputand Phase-Detector InputRefer to the SYNC Output and Phase Detector sectionsof the MAX038 data sheet for details of circuit synchro-nization. Access to the Phase Detector Input (PDI) and SYNC is provided at pads PDI and SYNC.High-speed transient currents in DGND and DV+ cancause a switching spike in the output waveform at thezero-crossing point. A lowpass output filter, as shown in Figure 3 of the MAX038 data sheet, may be used to greatly reduce the spike. Complete LC filter assemblies(S3LP series) are available from Coilcraft (phone:708-639-6400). If the SYNC output is not required, dis-abling the SYNC circuit will eliminate the switching spike. Cut the trace between the DV+ and +5V pads to disable the SYNC output.Evaluates: MAX038 MAX038 Evaluation Kit_______________________________________________________________________________________3E v a l u a t e s : M A X 038MAX038 Evaluation Kit 4_______________________________________________________________________________________Figure 1. MAX038 EV Kit SchematicEvaluates: MAX038MAX038 Evaluation Kit_______________________________________________________________________________________5Figure 2. MAX038 EV Kit Component Placement Guide—Component SideE v a l u a t e s : M A X 038MAX038 Evaluation Kit 6_______________________________________________________________________________________Figure 3. MAX038 EV Kit PC Board Layout—Component SideEvaluates: MAX038MAX038 Evaluation Kit_______________________________________________________________________________________7Figure 4. MAX038 EV Kit PC Board Layout—Solder SideE v a l u a t e s : M A X 038MAX038 Evaluation Kit NOTESMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.8_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©1996 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.。

MAX9813HEKA-T中文资料

Applications
Notebook Computers PDAs Smart Phones Car Kit Adapters Digital Cameras Video Tape Recorders
Pin Configurations, Selector Guide, and Typical Operating Circuits appear at end of data sheet. Rail-to-Rail is a trademark of Nippon Motorola Ltd.
元器件交易网
Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain Microphone Amplifiers with Integrated Bias MAX9812/MAX9813
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND) VCC ........................................................................-0.3V to +6.0V All Other Pins..............................................-0.3V to (VCC + 0.3V) Continuous Current (IN, SHDN, IN1, IN2, IN1/IN2)...........±20mA OUT, BIAS Short-Circuit Duration (to GND or VCC) ...Continuous Continuous Power Dissipation (TA = +70°C) 6-Pin SC70 (derate 3.1mW/°C above +70°C) ..............245mW 8-Pin SOT23 (derate 8.9mw/°C above +70°C) ............714mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Junction Temperature ......................................................+150°C Lead Temperature (soldering, 10s) .................................+300°C

MAX3232EEUE+T中文资料

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,or visit Maxim's website at .General DescriptionThe MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E +3.0V-powered EIA/TIA-232 and V.28/V.24communications interface devices feature low power con-sumption, high data-rate capabilities, and enhanced electrostatic-discharge (ESD) protection. The enhanced ESD structure protects all transmitter outputs and receiver inputs to ±15kV using IEC 1000-4-2 Air-G ap Discharge, ±8kV using IEC 1000-4-2 Contact Discharge (±9kV for MAX3246E), and ±15kV using the Human Body Model. The logic and receiver I/O pins of the MAX3237E are protected to the above standards, while the transmit-ter output pins are protected to ±15kV using the Human Body Model.A proprietary low-dropout transmitter output stage delivers true RS-232 performance from a +3.0V to +5.5V power supply, using an internal dual charge pump. The charge pump requires only four small 0.1µF capacitors for opera-tion from a +3.3V supply. Each device guarantees opera-tion at data rates of 250kbps while maintaining RS-232output levels. The MAX3237E guarantees operation at 250kbps in the normal operating mode and 1Mbps in the MegaBaud™ operating mode, while maintaining RS-232-compliant output levels.The MAX3222E/MAX3232E have two receivers and two transmitters. The MAX3222E features a 1µA shutdown mode that reduces power consumption in battery-pow-ered portable systems. The MAX3222E receivers remain active in shutdown mode, allowing monitoring of external devices while consuming only 1µA of supply current. The MAX3222E and MAX3232E are pin, package, and func-tionally compatible with the industry-standard MAX242and MAX232, respectively.The MAX3241E/MAX3246E are complete serial ports (three drivers/five receivers) designed for notebook and subnotebook computers. The MAX3237E (five drivers/three receivers) is ideal for peripheral applications that require fast data transfer. These devices feature a shut-down mode in which all receivers remain active, while consuming only 1µA (MAX3241E/MAX3246E) or 10nA (MAX3237E).The MAX3222E, MAX3232E, and MAX3241E are avail-able in space-saving SO, SSOP, TQFN and TSSOP pack-ages. The MAX3237E is offered in an SSOP package.The MAX3246E is offered in the ultra-small 6 x 6 UCSP™package.ApplicationsBattery-Powered Equipment PrintersCell PhonesSmart Phones Cell-Phone Data Cables xDSL ModemsNotebook, Subnotebook,and Palmtop ComputersNext-Generation Device Features♦For Space-Constrained ApplicationsMAX3228E/MAX3229E: ±15kV ESD-Protected, +2.5V to +5.5V, RS-232 Transceivers in UCSP ♦For Low-Voltage or Data Cable ApplicationsMAX3380E/MAX3381E: +2.35V to +5.5V, 1µA, 2Tx/2Rx, RS-232 Transceivers with ±15kV ESD-Protected I/O and Logic PinsMAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V ,Up to 1Mbps, True RS-232 Transceivers________________________________________________________________Maxim Integrated Products 119-1298; Rev 11; 10/07Ordering Information continued at end of data sheet.*Dice are tested at T A = +25°C, DC parameters only.**EP = Exposed paddle.Pin Configurations, Selector Guide, and Typical Operating Circuits appear at end of data sheet.MegaBaud and UCSP are trademarks of Maxim Integrated Products, Inc.†Covered by U.S. Patent numbers 4,636,930; 4,679,134;4,777,577; 4,797,899; 4,809,152; 4,897,774; 4,999,761; and other patents pending.M A X 3222E /M A X 3232E /M A X 3237E /M A X 3241E †/M A X 3246EUp to 1Mbps, True RS-232 TransceiversABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V CC = +3V to +5.5V, C1–C4 = 0.1µF, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Notes 3, 4)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.V CC to GND..............................................................-0.3V to +6V V+ to GND (Note 1)..................................................-0.3V to +7V V- to GND (Note 1)...................................................+0.3V to -7V V+ + |V-| (Note 1).................................................................+13V Input Voltages T_IN, EN , SHDN , MBAUD to GND ........................-0.3V to +6V R_IN to GND.....................................................................±25V Output Voltages T_OUT to GND...............................................................±13.2V R_OUT, R_OUTB (MAX3241E)................-0.3V to (V CC + 0.3V)Short-Circuit Duration, T_OUT to GND.......................Continuous Continuous Power Dissipation (T A = +70°C)16-Pin SSOP (derate 7.14mW/°C above +70°C)..........571mW 16-Pin TSSOP (derate 9.4mW/°C above +70°C).......754.7mW 16-Pin TQFN (derate 20.8mW/°C above +70°C).....1666.7mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C).....762mW 18-Pin Wide SO (derate 9.52mW/°C above +70°C).....762mW 18-Pin PDIP (derate 11.11mW/°C above +70°C)..........889mW 20-Pin TQFN (derate 21.3mW/°C above +70°C)........1702mW 20-Pin TSSOP (derate 10.9mW/°C above +70°C)........879mW 20-Pin SSOP (derate 8.00mW/°C above +70°C)..........640mW 28-Pin SSOP (derate 9.52mW/°C above +70°C)..........762mW 28-Pin Wide SO (derate 12.50mW/°C above +70°C).............1W 28-Pin TSSOP (derate 12.8mW/°C above +70°C)......1026mW 32-Lead Thin QFN (derate 33.3mW/°C above +70°C)..2666mW 6 x 6 UCSP (derate 12.6mW/°C above +70°C).............1010mW Operating Temperature Ranges MAX32_ _EC_ _...................................................0°C to +70°C MAX32_ _EE_ _.................................................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°C Bump Reflow Temperature (Note 2)Infrared, 15s..................................................................+200°C Vapor Phase, 20s..........................................................+215°C Note 1:V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.Note 2:This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the devicecan be exposed to during board-level solder attach and rework. This limit permits only the use of the solder profiles recom-mended in the industry-standard specification, JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and convection reflow.Preheating is required. Hand or wave soldering is not allowed.MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246EUp to 1Mbps, True RS-232 Transceivers_______________________________________________________________________________________3M A X 3222E /M A X 3232E /M A X 3237E /M A X 3241E †/M A X 3246EUp to 1Mbps, True RS-232 Transceivers4_______________________________________________________________________________________TIMING CHARACTERISTICS—MAX3237E(V CC = +3V to +5.5V, C1–C4 = 0.1µF, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 3)±10%. MAX3237E: C1–C4 = 0.1µF tested at +3.3V ±5%, C1–C4 = 0.22µF tested at +3.3V ±10%; C1 = 0.047µF, C2, C3, C4 =0.33µF tested at +5.0V ±10%. MAX3246E; C1-C4 = 0.22µF tested at +3.3V ±10%; C1 = 0.22µF, C2, C3, C4 = 0.54µF tested at 5.0V ±10%.Note 4:MAX3246E devices are production tested at +25°C. All limits are guaranteed by design over the operating temperature range.Note 5:The MAX3237E logic inputs have an active positive feedback resistor. The input current goes to zero when the inputs are atthe supply rails.Note 6:MAX3241EEUI is specified at T A = +25°C.Note 7:Transmitter skew is measured at the transmitter zero crosspoints.TIMING CHARACTERISTICS—MAX3222E/MAX3232E/MAX3241E/MAX3246EMAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246EUp to 1Mbps, True RS-232 Transceivers_______________________________________________________________________________________5-6-4-202460MAX3237ETRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE (MBAUD = GND)LOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P U T V O L T A G E (V )10001500500200025003000531-1-3-5-6-2-42046-5-31-135010001500500200025003000LOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P U T V O L T A G E (V )MAX3237ETRANSMITTER OUTPUT VOLTAGEvs. LOAD CAPACITANCE-7.5-5.0-2.502.55.07.5MAX3237ETRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE (MBAUD = V CC )LOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P U T V O L T A G E (V )500100015002000__________________________________________Typical Operating Characteristics(V CC = +3.3V, 250kbps data rate, 0.1µF capacitors, all transmitters loaded with 3k Ωand C L , T A = +25°C, unless otherwise noted.)-6-5-4-3-2-10123456010002000300040005000MAX3241ETRANSMITTER OUTPUT VOLTAGEvs. LOAD CAPACITANCELOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P U T V O L T A G E (V)302010405060020001000300040005000MAX3241EOPERATING SUPPLY CURRENT vs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S U P P L Y C U R R E N T (m A )04286121014010002000300040005000MAX3241ESLEW RATE vs. LOAD CAPACITANCEM A X 3237E t o c 05LOAD CAPACITANCE (pF)S L E W R A T E (V /μs )-6-5-4-3-2-10123456010002000300040005000MAX3222E/MAX3232ETRANSMITTER OUTPUT VOLTAGEvs. LOAD CAPACITANCELOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P UT V O L T A G E (V )624108141216010002000300040005000MAX3222E/MAX3232ESLEW RATE vs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S L E W R A T E (V /μs)2520155103530404520001000300040005000MAX3222E/MAX3232E OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S U P P L Y C U R R E N T (m A )M A X 3222E /M A X 3232E /M A X 3237E /M A X 3241E †/M A X 3246EUp to 1Mbps, True RS-232 Transceivers6_______________________________________________________________________________________Typical Operating Characteristics (continued)(V CC = +3.3V, 250kbps data rate, 0.1µF capacitors, all transmitters loaded with 3k Ωand C L , T A = +25°C, unless otherwise noted.)20604080100MAX3237ETRANSMITTER SKEW vs. LOAD CAPACITANCE(MBAUD = V CC )LOAD CAPACITANCE (pF)100015005002000T R A N S M I T T E R S K E W (n s )-6-2-42046-3-51-1352.03.03.52.54.04.55.0SUPPLY VOLTAGE (V)T R A N S M I T T E R O U T P U T V O L T A G E (V )MAX3237ETRANSMITTER OUTPUT VOLTAGE vs. SUPPLY VOLTAGE (MBAUD = GND)10203040502.0MAX3237E SUPPLY CURRENT vs. SUPPLY VOLTAGE (MBAUD = GND)SUPPLY VOLTAGE (V)S U P P L Y C U R R E N T (m A )3.03.52.54.04.55.0MAX3246ETRANSMITTER OUTPUT VOLTAGEvs. LOAD CAPACITANCELOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P U T V O L T A G E (V )4000300010002000-5-4-3-2-101234567-65000468101214160MAX3246ESLEW RATE vs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S L EW R A T E (V /μs )200030001000400050001020304050600MAX3246EOPERATING SUPPLY CURRENT vs. LOAD CAPACITANCEM A X 3237E t o c 17LOAD CAPACITANCE (pF)S U P P L Y C U R R EN T (m A )1000200030004000500055453525155024681012MAX3237ESLEW RATE vs. LOAD CAPACITANCE(MBAUD = GND)LOAD CAPACITANCE (pF)S L E W R A T E (V /μs )10001500500200025003000010203050406070MAX3237ESLEW RATE vs. LOAD CAPACITANCE(MBAUD = V CC )LOAD CAPACITANCE (pF)S L E W R A T E (V /μs )5001000150020001020304050MAX3237ESUPPLY CURRENT vs. LOAD CAPACITANCE WHEN TRANSMITTING DATA (MBAUD = GND)LOAD CAPACITANCE (pF)S U P P L Y C U R R E N T (m A )10001500500200025003000MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246EUp to 1Mbps, True RS-232 Transceivers_______________________________________________________________________________________7Pin DescriptionM A X 3222E /M A X 3232E /M A X 3237E /M A X 3241E †/M A X 3246EUp to 1Mbps, True RS-232 Transceivers8_______________________________________________________________________________________MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246EUp to 1Mbps, True RS-232 Transceivers_______________________________________________________________________________________9Detailed DescriptionDual Charge-Pump Voltage ConverterThe MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246Es’ internal power supply consists of a regu-lated dual charge pump that provides output voltages of +5.5V (doubling charge pump) and -5.5V (inverting charge pump) over the +3.0V to +5.5V V CC range. The charge pump operates in discontinuous mode; if the output voltages are less than 5.5V, the charge pump is enabled, and if the output voltages exceed 5.5V, the charge pump is disabled. Each charge pump requires a flying capacitor (C1, C2) and a reservoir capacitor (C3, C4) to generate the V+ and V- supplies (Figure 1).RS-232 TransmittersThe transmitters are inverting level translators that con-vert TTL/CMOS-logic levels to ±5V EIA/TIA-232-compli-ant levels.The MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E transmitters guarantee a 250kbps data rate with worst-case loads of 3k Ωin parallel with 1000pF,providing compatibility with PC-to-PC communication software (such as LapLink™). Transmitters can be par-alleled to drive multiple receivers or mice.The MAX3222E/MAX3237E/MAX3241E/MAX3246E transmitters are disabled and the outputs are forcedinto a high-impedance state when the device is in shut-down mode (SHDN = G ND). The MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E permit the outputs to be driven up to ±12V in shutdown.The MAX3222E/MAX3232E/MAX3241E/MAX3246E transmitter inputs do not have pullup resistors. Connect unused inputs to GND or V CC . The MAX3237E’s trans-mitter inputs have a 400k Ωactive positive-feedback resistor, allowing unused inputs to be left unconnected.MAX3237E MegaBaud OperationFor higher-speed serial communications, the MAX3237E features MegaBaud operation. In MegaBaud operating mode (MBAUD = V CC ), the MAX3237E transmitters guarantee a 1Mbps data rate with worst-case loads of 3k Ωin parallel with 250pF for +3.0V < V CC < +4.5V. For +5V ±10% operation, the MAX3237E transmitters guarantee a 1Mbps data rate into worst-case loads of 3k Ωin parallel with 1000pF.RS-232 ReceiversThe receivers convert RS-232 signals to CMOS-logic output levels. The MAX3222E/MAX3237E/MAX3241E/MAX3246E receivers have inverting three-state outputs.Drive EN high to place the receiver(s) into a high-impedance state. Receivers can be either active or inactive in shutdown (Table 1).Figure 1. Slew-Rate Test CircuitsLapLink is a trademark of Traveling Software.M A X 3222E /M A X 3232E /M A X 3237E /M A X 3241E †/M A X 3246EUp to 1Mbps, True RS-232 Transceivers10______________________________________________________________________________________The complementary outputs on the MAX3237E/MAX3241E (R_OUTB) are always active, regardless of the state of EN or SHDN . This allows the device to be used for ring indicator applications without forward biasing other devices connected to the receiver outputs. This is ideal for systems where V CC drops to zero in shutdown to accommodate peripherals such as UARTs (Figure 2).MAX3222E/MAX3237E/MAX3241E/MAX3246E Shutdown ModeSupply current falls to less than 1µA in shutdown mode (SHDN = low). The MAX3237E’s supply current falls to10nA (typ) when all receiver inputs are in the invalid range (-0.3V < R_IN < +0.3). When shut down, the device’s charge pumps are shut off, V+ is pulled down to V CC , V- is pulled to ground, and the transmitter out-puts are disabled (high impedance). The time required to recover from shutdown is typically 100µs, as shown in Figure 3. Connect SHDN to V CC if shutdown mode is not used. SHDN has no effect on R_OUT or R_OUTB (MAX3237E/MAX3241E).±15kV ESD ProtectionAs with all Maxim devices, ESD-protection structures are incorporated to protect against electrostatic dis-charges encountered during handling and assembly.The driver outputs and receiver inputs of the MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E have extra protection against static electricity. Maxim’s engineers have developed state-of-the-art structures to protect these pins against ESD of ±15kV without damage.The ESD structures withstand high ESD in all states:normal operation, shutdown, and powered down. After an ESD event, Maxim’s E versions keep working without latchup, whereas competing RS-232 products can latch and must be powered down to remove latchup.Furthermore, the MAX3237E logic I/O pins also have ±15kV ESD protection. Protecting the logic I/O pins to ±15kV makes the MAX3237E ideal for data cable applications.SHDN T2OUTT1OUT5V/div2V/divV CC = 3.3V C1–C4 = 0.1μFFigure 3. Transmitter Outputs Recovering from Shutdown or Powering UpMAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246EUp to 1Mbps, True RS-232 TransceiversESD protection can be tested in various ways; the transmitter outputs and receiver inputs for the MAX3222E/MAX3232E/MAX3241E/MAX3246E are characterized for protection to the following limits:•±15kV using the Human Body Model•±8kV using the Contact Discharge method specified in IEC 1000-4-2•±9kV (MAX3246E only) using the Contact Discharge method specified in IEC 1000-4-2•±15kV using the Air-G ap Discharge method speci-fied in IEC 1000-4-2Figure 4a. Human Body ESD Test ModelFigure 4b. Human Body Model Current WaveformFigure 5a. IEC 1000-4-2 ESD Test Model Figure 5b. IEC 1000-4-2 ESD Generator Current WaveformM A X 3222E /M A X 3232E /M A X 3237E /M A X 3241E †/M A X 3246EUp to 1Mbps, True RS-232 Transceiverscharacterized for protection to ±15kV per the Human Body Model.ESD Test ConditionsESD performance depends on a variety of conditions.Contact Maxim for a reliability report that documents test setup, test methodology, and test results.Human Body ModelFigure 4a shows the Human Body Model, and Figure 4b shows the current waveform it generates when dis-charged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest,which is then discharged into the test device through a 1.5k Ωresistor.IEC 1000-4-2The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment; it does not specifi-cally refer to integrated circuits. The MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E help you design equipment that meets level 4 (the highest level)of IEC 1000-4-2, without the need for additional ESD-protection components.The major difference between tests done using the Human Body Model and IEC 1000-4-2 is higher peak current in IEC 1000-4-2, because series resistance is lower in the IEC 1000-4-2 model. Hence, the ESD with-stand voltage measured to IEC 1000-4-2 is generally lower than that measured using the Human Body Model. Figure 5a shows the IEC 1000-4-2 model, and Figure 5b shows the current waveform for the ±8kV IEC 1000-4-2 level 4 ESD Contact Discharge test. The Air-G ap Discharge test involves approaching the device with a charged probe. The Contact Discharge method connects the probe to the device before the probe is energized.Machine ModelThe Machine Model for ESD tests all pins using a 200pF storage capacitor and zero discharge resis-tance. Its objective is to emulate the stress caused by contact that occurs with handling and assembly during manufacturing. All pins require this protection during manufacturing, not just RS-232 inputs and outputs.Therefore, after PC board assembly, the Machine Model is less relevant to I/O ports.Table 2. Required Minimum Capacitor ValuesFigure 6a. MAX3241E Transmitter Output Voltage vs. Load Current Per TransmitterTable 3. Logic-Family Compatibility with Various Supply VoltagesMAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246EUp to 1Mbps, True RS-232 TransceiversApplications InformationCapacitor SelectionThe capacitor type used for C1–C4 is not critical for proper operation; polarized or nonpolarized capacitors can be used. The charge pump requires 0.1µF capaci-tors for 3.3V operation. For other supply voltages, see Table 2 for required capacitor values. Do not use val-ues smaller than those listed in Table 2. Increasing the capacitor values (e.g., by a factor of 2) reduces ripple on the transmitter outputs and slightly reduces power consumption. C2, C3, and C4 can be increased without changing C1’s value. However, do not increase C1without also increasing the values of C2, C3, C4,and C BYPASS to maintain the proper ratios (C1 to the other capacitors).When using the minimum required capacitor values,make sure the capacitor value does not degradeexcessively with temperature. If in doubt, use capaci-tors with a larger nominal value. The capacitor’s equiv-alent series resistance (ESR), which usually rises at low temperatures, influences the amount of ripple on V+and V-.Power-Supply DecouplingIn most circumstances, a 0.1µF V CC bypass capacitor is adequate. In applications sensitive to power-supply noise, use a capacitor of the same value as charge-pump capacitor C1. Connect bypass capacitors as close to the IC as possible.Operation Down to 2.7VTransmitter outputs meet EIA/TIA-562 levels of ±3.7V with supply voltages as low as 2.7V.Figure 6b. Mouse Driver Test CircuitM A X 3222E /M A X 3232E /M A X 3237E /M A X 3241E †/M A X 3246EUp to 1Mbps, True RS-232 TransceiversFigure 7. Loopback Test CircuitT1IN T1OUTR1OUT5V/div5V/div5V/divV CC = 3.3V C1–C4 = 0.1μFFigure 8. MAX3241E Loopback Test Result at 120kbps T1INT1OUTR1OUT5V/div5V/div5V/divV CC = 3.3V, C1–C4 = 0.1μFFigure 9. MAX3241E Loopback Test Result at 250kbps+5V 0+5V 0-5V +5VT_INT_OUT5k Ω + 250pFR_OUTV CC = 3.3V C1–C4 = 0.1μFFigure 10. MAX3237E Loopback Test Result at 1000kbps (MBAUD = V CC )Transmitter Outputs Recoveringfrom ShutdownFigure 3 shows two transmitter outputs recovering from shutdown mode. As they become active, the two trans-mitter outputs are shown going to opposite RS-232 levels (one transmitter input is high; the other is low). Each transmitter is loaded with 3k Ωin parallel with 2500pF.The transmitter outputs display no ringing or undesir-able transients as they come out of shutdown. Note thatthe transmitters are enabled only when the magnitude of V- exceeds approximately -3.0V.Mouse DrivabilityThe MAX3241E is designed to power serial mice while operating from low-voltage power supplies. It has been tested with leading mouse brands from manu-facturers such as Microsoft and Logitech. The MAX3241E successfully drove all serial mice tested and met their current and voltage requirements.MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246EUp to 1Mbps, True RS-232 TransceiversFigure 6a shows the transmitter output voltages under increasing load current at +3.0V. Figure 6b shows a typical mouse connection using the MAX3241E.High Data RatesThe MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E maintain the RS-232 ±5V minimum transmit-ter output voltage even at high data rates. Figure 7shows a transmitter loopback test circuit. Figure 8shows a loopback test result at 120kbps, and Figure 9shows the same test at 250kbps. For Figure 8, all trans-mitters were driven simultaneously at 120kbps into RS-232 loads in parallel with 1000pF. For Figure 9, a single transmitter was driven at 250kbps, and all transmitters were loaded with an RS-232 receiver in parallel with 1000pF.The MAX3237E maintains the RS-232 ±5.0V minimum transmitter output voltage at data rates up to 1Mbps.Figure 10 shows a loopback test result at 1Mbps with MBAUD = V CC . For Figure 10, all transmitters were loaded with an RS-232 receiver in parallel with 250pF.Interconnection with 3V and 5V LogicThe MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E can directly interface with various 5V logic families, including ACT and HCT CMOS. See Table 3for more information on possible combinations of inter-connections.UCSP ReliabilityThe UCSP represents a unique packaging form factor that may not perform equally to a packaged product through traditional mechanical reliability tests. UCSP reliability is integrally linked to the user’s assembly methods, circuit board material, and usage environ-ment. The user should closely review these areas when considering use of a UCSP package. Performance through Operating Life Test and Moisture Resistance remains uncompromised as the wafer-fabrication process primarily determines it.Mechanical stress performance is a greater considera-tion for a UCSP package. UCSPs are attached through direct solder contact to the user’s PC board, foregoing the inherent stress relief of a packaged product lead frame. Solder joint contact integrity must be consid-ered. Table 4 shows the testing done to characterize the UCSP reliability performance. In conclusion, the UCSP is capable of performing reliably through envi-ronmental stresses as indicated by the results in the table. Additional usage data and recommendations are detailed in the UCSP application note, which can be found on Maxim’s website at .Table 4. Reliability Test DataM A X 3222E /M A X 3232E /M A X 3237E /M A X 3241E †/M A X 3246EUp to 1Mbps, True RS-232 Transceivers__________________________________________________________Pin ConfigurationsMAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246EUp to 1Mbps, True RS-232 TransceiversPin Configurations (continued)M A X 3222E /M A X 3232E /M A X 3237E /M A X 3241E †/M A X 3246EUp to 1Mbps, True RS-232 Transceivers__________________________________________________Typical Operating CircuitsMAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246EUp to 1Mbps, True RS-232 Transceivers_____________________________________Typical Operating Circuits (continued)M A X 3222E /M A X 3232E /M A X 3237E /M A X 3241E †/M A X 3246EUp to 1Mbps, True RS-232 Transceivers_____________________________________Typical Operating Circuits (continued)MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246EUp to 1Mbps, True RS-232 Transceivers______________________________________________________________________________________21Selector Guide___________________Chip InformationTRANSISTOR COUNT:MAX3222E/MAX3232E: 1129MAX3237E: 2110MAX3241E: 1335MAX3246E: 842PROCESS: BICMOSOrdering Information (continued)†Requires solder temperature profile described in the AbsoluteMaximum Ratings section. UCSP Reliability is integrally linked to the user’s assembly methods, circuit board material, and environment. Refer to the UCSP Reliability Notice in the UCSP Reliability section of this datasheet for more information.**EP = Exposed paddle.。

MAX1290中文资料

元器件交易网
19-1532; Rev 0; 9/99
KIT ATION EVALU E L B AVAILA
250ksps, +3V, 8-/4-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface
D4 5 D3/D11 6 D2/D10 7 D1/D9 8 D0/D8 9
MAX1291
23 COM 22 CH0 21 CH1 20 CH2 19 CH3 18 CH4 17 CH5 16 CH6 15 CH7
Ordering Information
PART MAX1291ACEI MAX1291BCEI MAX1291AEEI MAX1291BEEI TEMP. RANGE 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C PIN-PACKAGE 28 QSOP 28 QSOP 28 QSOP 28 QSOP INL (LSB) ±0.5 ±1 ±0.5 ±1
INT 10 RD 11 WR 12 CLK 13 CS 14
QSOP Pin Configurations continued at end of data sheet.
Ordering Information continued at end of data sheet.
Typical Operating Circuits appear at end of data sheet.
元器件交易网
250ksps, +3V, 8-/4-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface MAX1291/MAX1293

MAX038资料中文

高频信号发生器_______________概述MAX038是一种只需极少外围电路就能实现高频、高精度输出三角波、锯齿波、正弦波、方波和脉冲波的精密高频函数发生器芯片。

内部提供的2.5V 基准电压和一个外接电阻和电容可以控制输出频率范围在0.1Hz 到20MHz 。

占空比可在较大的范围内由一个±2.3V的线性信号控制变化，便于进行脉冲宽度调制和产生锯齿波。

频率调整和频率扫描可以用同样的方式实现。

占空比和频率控制是独立的。

通过设置2个TTL 逻辑地址引脚合适的逻辑电平，能设定正弦波，方波或三角波的输出。

所有波形的输出都是峰-峰值为±2VP -P 的信号。

低阻抗输出能力可以达到±20mA。

____________________________性能o 频率调节范围：0.1Hz 到20MHzo 三角波, 锯齿波, 正弦波, 方波和脉冲波 o 频率和占空比独立可调 o 频率扫描范围：350：1 o 可控占空比：15%到85% o 低阻抗输出缓冲器： 0.1Ω o 低失真正弦波： 0.75% o 低温度漂移： 200ppm/°C______________型号信息TTL 逻辑地址引脚SYNC 从内部振荡器输出占空比固定为50%的信号，不受其它波占空比的影响，从而同步系统中其它振荡器。

内部振荡器允许被连接着相位检波器输入端（PDI ）的外部 TTL 时钟同步。

型号 MAX038CPP MAX038CWP MAX038C/D MAX038EPP MAX038EWP工作温度 0°C 到 +70°C 0°C 到 +70°C 0°C 到 +70°C -40°C 到 +85°C -40°C 到 +85°C引脚--封装 20 Plastic DIP 20 SO Dice* 20 Plastic DIP 20 SO.__________________应用精密函数信号发生器压控振荡器频率调制器*Contact factory for dice specifications.__________________引脚图脉宽调制器锁相环频率合成器FSK 发生器（正弦波和方波）________________________________________________________________ Maxim Integrated Products1For free samples & the latest literature: , or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext. 3468MAX038高频信号发生器图1. 内部结构及基本工作电路_______________ 详细说明MAX038是一种高频函数信号发生器，它可以使用最少的外部元件而产生低失真正弦波，三角波，锯齿波，方波（脉冲波）。

MAX1737EEI中文资料

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Ordering Information
PART MAX1737EEI TEMP. RANGE -40°C to +85°C PIN-PACKAGE 28 QSOP
Applications
Notebook Computers Hand-Held Instruments Li+ Battery Packs Desktop Cradle Chargers
INPUT SUPPLY
Typical Operating Circuit
DCIN VL
CSSP CSSN DHI
Pin Configuration
TOP VIEW
VL 1 ISETIN 2 ISETOUT 3 THM 4 REF 5 GND 6 BATT 7 VADJ 8 CCV 9 CCS 10 CCI 11 CELL 12 TIMER1 13 TIMER2 14 28 DCIN 27 CSSP 26 CSSN 25 DHI 24 LX

MAXIM MAX3212 数据手册

_______________General DescriptionThe MAX3212 uses Maxim’s new proprietary Auto-Shutdown mode to reduce supply current to 1µA. The MAX3212, with 3 RS-232 drivers and 5 RS-232 receivers,is intended for 2.7V to 3.6V-powered EIA/TIA-232E and V.28/V.24 serial interface. True RS-232 levels are main-tained across the operating range. A guaranteed data rate of 235kbps provides compatibility with popular soft-ware for communicating with personal computers.Supply current is reduced to 1µA with Maxim’s new AutoShutdown feature. When the MAX3212 does not sense a valid signal level on the receiver inputs, the on-board power supply and drivers shut down. This occurs if the RS-232 cable is disconnected or if the transmit-ters of the connected peripheral are turned off. The sys-tem turns on again when a valid level is applied to any RS-232 receiver input. As a result, the system saves power without changes to the existing software.A second power-management feature is incorporated to permit automatic shutdown when the RS-232 connection is valid but inactive. In this case, a transition detector facilitates shutdown when the receivers are presented with stationary RS-232 levels for long periods.Three-state drivers are provided on receiver outputs so that multiple receivers, generally of different interface standards, can be wire-ORed at the UART. The MAX3212 is available in 28-pin SO and SSOP packages.________________________ApplicationsNotebook and Palmtop Computers Peripherals InstrumentsBattery-Powered Equipment______________Ordering Information____________________________FeaturesBETTER THAN BIPOLAR!o 1µA Supply Current Using AutoShutdown o Operates from Single +2.7V to +3.6V Supply o 28-Pin SSOP or Wide SO Packageso Meets All EIA/TIA-232E & EIA/TIA-562 Specifications o Mouse Driveability–Guaranteedo Low-Cost, Surface-Mount External Components o235kbps Guaranteed Data Rate–LapLink™Compatible o +5V Logic Compatibleo Complementary Receiver Output Always Active o Flow-Through PinoutMAX3212+2.7V to +3.6V-Powered, 1µA Supply Current,3-Driver/5-Receiver, True RS-232 Transceiver________________________________________________________________Maxim Integrated Products 1Call toll free 1-800-998-8800 for free samples or literature.Pin Configuration appears at end of data sheet.__________Typical Operating Circuit19-0312; Rev 0; 9/94M A X 3212+2.7V to +3.6V-Powered, 1µA Supply Current,3-Driver/5-Receiver, True RS-232 Transceiver 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V CC = 2.7V to 3.6V, T A = T MIN to T MAX , unless otherwise noted.)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Supply VoltagesV CC .....................................................................-0.3V to +4.6V V+............................................................(V CC - 0.3V) to +7.4V V-........................................................................-7.4V to +2.0V LN..............................................................-0.3V to (V+ + 1.0V)LP.......................................................(V- - 1.0V) to (V+ + 0.3V)Input VoltagesT_IN, EN, FORCEON, FORCEOFF.....................-0.3V to +7.0V R_IN..................................................................................±25V Output VoltagesT_OUT...............................................................................±15V R_OUT, R5OUTB, INVALID, TRAN............-0.3V to (V+ + 0.3V)Short-Circuit Duration, T_OUT....................................Continuous Continuous Power Dissipation (T A = +70°C)Wide SO (derate 11.76mW/°C above +70°C)...............941mW SSOP (derate 8.00mW/°C above +70°C).....................640mW Operating Temperature RangesMAX3212C_ I.......................................................0°C to +70°C MAX3212E_ I....................................................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10sec).............................+300°CMAX3212+2.7V to +3.6V-Powered, 1µA Supply Current,3-Driver/5-Receiver, True RS-232 Transceiver_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS (continued)(V CC = 2.7V to 3.6V, T A = T MIN to T MAX , unless otherwise noted.)TIMING CHARACTERISTICS(V CC = 2.7V to 3.6V, T A = T MIN to T MAX , unless otherwise noted.)M A X 3212+2.7V to +3.6V-Powered, 1µA Supply Current,3-Driver/5-Receiver, True RS-232 Transceiver 4_________________________________________________________________________________________________________________________________Typical Operating Characteristics(V CC = 3.3V, T A = +25°C, unless otherwise noted.)15TRANSMITTING SUPPLY CURRENTvs. DATA RATEDATA RATE (kbps)S U P P L Y C U R R E N T (m A )2025303540455010015020025015200TRANSMITTING SUPPLY CURRENTvs. LOAD CAPACITANCELOAD CAPACITANCE/TRANSMITTER (pF)S U P P L Y C U R R E N T (m A )25303540455055606510002000300040005000-102.0SUPPLY CURRENT vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)S U P P L Y C U R R E N T (m A )1020304050602.53.0 3.54.0020SLEW RATEvs. LOAD CAPACITANCELOAD CAPACITANCE/TRANSMITTER (pF)S L E W R A T E (V /µs )46810121410002000300040005000-7.5-5.00TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE AT 235kbpsLOAD CAPACITANCE/TRANSMITTER (pF)T R A N S M I T T E R O U T P U T V O L T A G E (V )-2.502.55.07.510002000300040005000TIME TO EXIT SHUTDOWN: ONETRANSMITTER HIGH, ONE TRANSMITTER LOW0V 0V2V /d i vFORCEON, FORCEOFFV OHT_OUTV OLR L = 3k Ω || 2500pF 100µs/div_______________Detailed DescriptionThe MAX3212 line driver/receiver is intended for 3V-powered EIA/TIA-232E and V.28/V.24 communications interfaces where 3 drivers and 5 receivers are required.The operating voltage range extends from 3.6V down to 2.7V while still maintaining true RS-232 and EIA/TIA-562transmitter output voltage levels.The circuit comprises three sections: power supply,transmitters, and receivers. The power-supply section converts the supplied 3V to about ±6.5V, to provide the voltages necessary for the drivers to meet true RS-232 levels. External components are small and inex -pensive.The transmitters and receivers are guaranteed to oper-ate at data rates of 235kbps.The MAX3212 is equipped with Maxim’s new propri -etary AutoShutdown circuitry. This achieves a supply current of 1µA by shutting down the device when the RS-232 cable is disconnected or when the connected peripheral transmitters are turned off. While shut down,all receivers can remain active or can be disabledunder logic control. A complementary receiver remains active in all cases, enabling a system incorporating the MAX3212 to remain shut down and still monitor incom-ing RS-232 activity.Three-state drivers on all receiver outputs are provided so that multiple receivers, generally of different inter -face standards, can be wire-ORed at the UART.Switch-Mode Power SupplyThe switch-mode power supply uses a single inductor with two inexpensive diodes and two capacitors to generate ±6.5V from the 2.7V to 3.6V input. The Typical Operating Circuit shows the complete circuit for the pow-er supply.Use a 15µH inductor with a saturation current rating of at least 350mA and under 1Ωresistance. Use 1N6050diodes or equivalent. Surface-mount equivalents for the 1N6050 include the Motorola MMBD6050LT1, P hilips PMBD6050, and Allegro (formerly Sprague) TMPD6050LT.For C1 and C2, use ceramic capacitors with values no less than indicated in the Typical Operating Circuit .These capacitors determine the ripple on V+ and V-, butMAX3212+2.7V to +3.6V-Powered, 1µA Supply Current,3-Driver/5-Receiver, True RS-232 Transceiver_______________________________________________________________________________________5______________________________________________________________Pin DescriptionM A X 3212not the absolute voltages. Increasing the size of C1 and C2 increases the time V+ and V- take to reach their final value. Bypass V CC to GND with at least 0.33µF close to the MAX3212. Increase this to 4.7µF if there are no other V CC supply bypass components less than 6 inches (15cm) away from the MAX3212.Component suppliers are listed in Table 1.RS-232 DriversAll three drivers are identical and deliver EIA/TIA-232E and EIA/TIA-562 output voltage levels when V CC is be-tween 2.7V and 3.6V. When FORCEOFF is driven low or when the AutoShutdown circuitry senses invalid voltage levels at all receiver inputs, the drivers are disabled and the outputs are forced into a high-impedance state.RS-232 ReceiversThe MAX3212 receivers convert RS-232 signals to CMOS-logic output levels. All receivers have one in -verting three-state output. Receiver 5 also has a com-plementary (noninverting) output. In shutdown, all fiveinverting receivers can be either active or inactive under logic control.The complementary output (R5OUTB) is always active,regardless of the state of EN or the part’s shutdown sta-tus. R5OUTB can monitor RS-232 activity while the other receivers are high impedance. This allows Ring Indicator to be monitored without forward biasing other devices connected to the receiver outputs. This is ideal for systems where the UART’s V CC is set to 0V in shut-down. (See Figure 2.)Enable ControlThe EN input has two functions: It allows enabling/dis-abling of the receivers, and it is used to reset the transi-tion detector.Driving EN low places five inverting receiver outputs (R_OUT) into a high-impedance state. R5OUTB is always active, regardless of the state of EN or the part’s shutdown status (Table 2). EN has no effect on T_OUT.EN also resets the transition detector. Drive EN high and then low to reset the TRAN output low. TRAN goes high when a transition occurs on any receiver input.+2.7V to +3.6V-Powered, 1µA Supply Current,3-Driver/5-Receiver, True RS-232 TransceiverTable 1. Suggested Component SuppliersTable 2. AutoShutdown LogicAutoShutdownA 1µA supply current is achieved with Maxim’s new AutoShutdown feature, which operates when FORCEON is low and FORCEOFF is high. When the MAX3212 senses no valid signal level on any receiver input for typically 30µs, the on-board power supply and drivers shut down. Internal 5k Ωresistors pull the receiv-er inputs to ground, disabling the transmitters and reducing supply current to 1µA when the device is in AutoShutdown mode. This occurs if the RS-232 cable is disconnected or if the connected peripheral transmit-ters are turned off. The system turns on again when a valid level is applied to any RS-232 receiver input. As a result, the system saves power without changes to the existing BIOS or operating system. When using the AutoShutdown feature, INVALID is high when the device is on and low when the device is shut down. The INVALID output indicates the condition of the receiver inputs; INVALID can be used in any mode.MAX3212+2.7V to +3.6V-Powered, 1µA Supply Current,3-Driver/5-Receiver, True RS-232 Transceiver_______________________________________________________________________________________7Figure 1. Interface Under Control of PMUFigure 2. Detection of RS-232 Activity when the UART and Interface Are Shut Down: MAX3212 (b) vs. Previous Transceivers (a)M A X 3212Table 2 summarizes the MAX3212 operating modes.FORCEON and FORCEOFF override the automatic cir-cuitry and force the transceiver into its normal operat-ing state or into its low-power standby state. When neither control is asserted, the IC selects between these states automatically based on receiver input lev-els. Figure 4 depicts valid and invalid RS-232 receiver levels. The MAX3212 shuts down after sensing invalid RS-232 levels for greater than 30µs, ensuring the AutoShutdown mode is not enabled for slow-moving signals (1V/µs).A mouse or another system with AutoShutdown may need a period of time to wake up. Figure 5 shows a cir-cuit that forces the transmitters on for 100ms after start-up, allowing enough time for the other system to realize that the MAX3212 system is awake. If the other system outputs valid RS-232 signals within that time, the RS-232 ports on both systems remain enabled.Transition DetectorThe MAX3212 also has an on-board transition detector that monitors activity on the receiver inputs. In systems with a sleep mode, the transition detector output (TRAN)can be used to wake up the system when activity at the receiver inputs is detected. Before putting the system to sleep, set TRAN low by cycling EN high and then low.TRAN remains low as long as no activity is detected on the receiver inputs. When any receiver is toggled, TRAN latches high. Connect TRAN to a microprocessor inter -rupt, or if the system wakes up periodically TRAN can be polled. Transition detection is useful when valid RS-232 levels are present at the receiver inputs but no data is being sent. For example, if a printer is attached to the serial port but is not in use, the microprocessor senses this and forces the MAX3212 off.+2.7V to +3.6V-Powered, 1µA Supply Current,3-Driver/5-Receiver, True RS-232 Transceiver 8_______________________________________________________________________________________Figure 3. AutoShutdown LogicMAX3212+2.7V to +3.6V-Powered, 1µA Supply Current,3-Driver/5-Receiver, True RS-232 Transceiver_______________________________________________________________________________________9Mouse or Another SystemFigure 4. AutoShutdown Trip LevelsM A X 3212+2.7V to +3.6V-Powered, 1µA Supply Current,3-Driver/5-Receiver, True RS-232 Transceiver 10___________________________________________________________________________________________+3V-Powered EIA/TIA-232 and EIA/TIA-562 Transceivers from MaximDriving the MAX3212 from 5V LogicThe MAX3212 can directly interface with various 5V logic families, including ACT and HCT CMOS.Mouse DriveabilityThe MAX3212 has been specifically designed to power serial mice while operating from low-voltage power sup-plies. It has been tested with samples of ten major mouse models from six manufacturers, including the leading three, Logitech (5 models), Mouse Systems,and Microsoft. The MAX3212 successfully drove all ser-ial mice and met their respective current and voltage requirements.Figure 6 shows the transmitter output voltages under increasing load current. The MAX3212’s switching reg-ulator ensures the transmitters will supply at least ±5V during worst-case load conditions.MAX3212+2.7V to +3.6V-Powered, 1µA Supply Current,3-Driver/5-Receiver, True RS-232 Transceiver______________________________________________________________________________________11__________________Pin ConfigurationTRANSISTOR COUNT: 1435Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.12__________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600©1994 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.M A X 3212+2.7V to +3.6V-Powered, 1µA Supply Current,3-Driver/5-Receiver, True RS-232 Transceiver ________________________________________________________Package Information。

maxim MAX811 MAX812 datasheet说明书

General DescriptionThe MAX811/MAX812 are low-power microprocessor (μP) supervisory circuits used to monitor power supplies in μP and digital systems. They provide excellent circuit reliability and low cost by eliminating external compo-nents and adjustments when used with 5Vpowered or 3V-powered circuits. The MAX811/MAX812 also provide a debounced manual reset input.These devices perform a single function: They assert a reset signal whenever the V CC supply voltage falls below a preset threshold, keeping it asserted for at least 140ms after V CC has risen above the reset threshold. The only difference between the two devices is that the MAX811 has an active-low RESET output (which is guaranteed to be in the correct state for V CC down to 1V), while the MAX812 has an active-high RESET output. The reset comparator is designed to ignore fast transients on V CC. Reset thresholds are available for operation with a variety of supply voltages.Low supply current makes the MAX811/MAX812 ideal for use in portable equipment. The devices come in a 4-pin SOT143 package.Applications●Computers●Controllers●Intelligent Instruments●Critical μP and μC Power Monitoring●Portable/Battery-Powered Equipment Benefits and Features●Integrated Voltage Monitor Increases SystemRobustness with Added Manual Reset• Precision Monitoring of 3V, 3.3V, and 5VPower-Supply Voltages• 140ms Min Power-On-Reset Pulse Width• RESET Output (MAX811), RESET Output(MAX812)• Guaranteed Over Temperature• Guaranteed RESET Valid to V CC = 1V (MAX811)• Power-Supply Transient Immunity●Saves Board Space• No External Components• 4-Pin SOT143 Package●Low Power Consumption Simplifies Power-SupplyRequirements• 6μA Supply Current*This part offers a choice of five different reset threshold voltages. Select the letter corresponding to the desired nominal reset threshold voltage, and insert it into the blank to complete the part number.Devices are available in both leaded and lead(Pb)-free packaging. Specify lead-free by replacing “-T” with “+T” when ordering.RESET THRESHOLDSUFFIX VOLTAGE (V)L 4.63M 4.38T 3.08S 2.93R2.63PART*TEMP RANGE PIN-PACKAGEMAX811_EUS-T-40°C to +85°C 4 SOT143MAX812_EUS-T-40°C to +85°C 4 SOT1431243V CCMR(RESET) RESETGNDMAX811MAX812SOT143TOP VIEW( ) ARE FOR MAX812NOTE: SEE PACKAGE INFORMATION FOR MARKING INFORMATION. MAX811/MAX8124-Pin μP Voltage Monitorswith Manual Reset InputPin ConfigurationOrdering InformationClick here for production status of specific part numbers.19-0411; Rev 6; 5/18Terminal Voltage (with respect to GND)V CC.....................................................................-0.3V to 6.0V All Other Inputs .....................................-0.3V to (V CC + 0.3V) Input Current, V CC, MR......................................................20mA Output Current, RESET or RESET ....................................20mA Continuous Power Dissipation (T A = +70°C)SOT143 (derate 4mW/°C above +70°C) .....................320mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range ............................-65°C to +160°C Lead Temperature (soldering, 10sec) .............................+300°C(V CC = 5V for L/M versions, V CC = 3.3V for T/S versions, V CC = 3V for R version, T A = -40°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITSOperating Voltage Range V CC T A = 0°C to +70°C 1.0 5.5V T A = -40°C to +85°C 1.2Supply Current I CC MAX81_L/M, V CC = 5.5V, I OUT = 0615µA MAX81_R/S/T, V CC = 3.6V, I OUT = 0 2.710Reset Threshold V TH MAX81_LT A = +25°C 4.54 4.63 4.72V T A = -40°C to +85°C 4.50 4.75MAX81_MT A = +25°C 4.30 4.38 4.46T A = -40°C to +85°C 4.25 4.50MAX81_TT A = +25°C 3.03 3.08 3.14T A = -40°C to +85°C 3.00 3.15MAX81_ST A = +25°C 2.88 2.93 2.98T A = -40°C to +85°C 2.85 3.00MAX81_RT A = +25°C 2.58 2.63 2.68T A = -40°C to +85°C 2.55 2.70Reset Threshold Tempco30ppm/°CV CC to Reset Delay (Note 2)V OD = 125mV, MAX81_L/M40µs V OD = 125mV, MAX81_R/S/T20Reset Active Timeout Period t RP V CC = V TH(MAX)140560ms MR Minimum Pulse Width t MR10µs MR Glitch Immunity (Note 3)100ns MR to Reset PropagationDelay (Note 2)t MD0.5µsMR Input Threshold V IHV CC > V TH(MAX), MAX81_L/M2.3V V IL0.8V IHV CC > V TH(MAX), MAX81_R/S/T0.7 x V CCV IL0.25 x V CCMR Pull-Up Resistance102030kΩRESET Output Voltage (MAX812)V OH I SOURCE = 150µA, 1.8V < V CC < V TH(MIN)0.8 x V CCVV OLMAX812R/S/T only, I SINK = 1.2mA,V CC = V TH(MAX)0.3MAX812L/M only, I SINK = 3.2mA,V CC = V TH(MAX)0.4with Manual Reset InputAbsolute Maximum RatingsStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Electrical Characteristics(V CC = 5V for L/M versions, V CC = 3.3V for T/S versions, V CC = 3V for R version, T A = -40°C to +85°C, unless otherwise noted.Typical values are at T A = +25°C.) (Note 1)Note 1: Production testing done at T A = +25°C, over temperature limits guaranteed by design using six sigma design limits.Note 2: RESET output for MAX811, RESET output for MAX812.Note 3: “Glitches” of 100ns or less typically will not generate a reset pulse.PARAMETERSYMBOLCONDITIONSMINTYPMAX UNITSRESET Output Voltage (MAX811)V OLMAX811R/S/T only, I SINK = 1.2mA, V CC = V TH(MIN)0.3V MAX811L/M only, I SINK = 3.2mA, V CC = V TH(MIN)0.4I SINK = 50µA, V CC > 1.0V0.3V OHMAX811R/S/T only, I SOURCE = 500µA, V CC > V TH(MAX)0.8 x V CC MAX811L/M only, I SOURCE = 800µA, V CC > V TH(MAX)V CC - 1.5with Manual Reset InputElectrical Characteristics (continued)(T A = +25°C, unless otherwise noted.)SUPPLY CURRENT vs. TEMPERATURE(MAX81_L/M)8TEMPERATURE (°C)S U P P L Y C U R R E N T (µA )426-408510-156035190POWER-UP RESET TIMEOUTvs. TEMPERATURE230TEMPERATURE (°C)P O W E R -U P R E S E T T I M E O U T (m s )210200220-408535-1510600POWER-DOWN RESET DELAY vs. TEMPERATURE(MAX81_R/S/T)80100TEMPERATURE (°C)P O W E R -D O W N R E S E T D E L A Y (µs )402060-408510-156035RESET THRESHOLD DEVIATIONvs. TEMPERATURE0.99951.00001.0005M A X 811/12-T O C 6TEMPERATURE (°C)N O R M A L I Z E D T H R E S H O L D (V )0.99850.99800.9990-408535-1510600-4085SUPPLY CURRENT vs. TEMPERATURE(MAX81_R/S/T)2.02.53.0M A X 811/12-T O C 1TEMPERATURE (°C)S U P P L Y C U R R E N T (µA )101.00.5-15601.535POWER-DOWN RESET DELAY vs. TEMPERATURE(MAX81_L/M)200TEMPERATURE (°C)P O W E R -D O W N R E S E T D E L A Y (µs )10050150-408510-156035with Manual Reset InputTypical Operating CharacteristicsDetailed DescriptionReset OutputA microprocessor’s (μP’s) reset input starts the μP in a known state. These μP supervisory circuits assert reset to prevent code execution errors during power-up, power-down, or brownout conditions.RESET is guaranteed to be a logic low for V CC> 1V. Once V CC exceeds the reset threshold, an internal timer keeps RESET low for the reset timeout period; after this interval, RESET goes high.If a brownout condition occurs (V CC dips below the reset threshold), RESET goes low. Any time V CC goes below the reset threshold, the internal timer resets to zero, and RESET goes low. The internal timer starts after V CC returns above the reset threshold, and RESET remains low for the reset timeout period.The manual reset input (MR) can also initiate a reset. See the Manual Reset Input section.The MAX812 has an active-high RESET output that is the inverse of the MAX811’s RESET output.Manual Reset InputMany μP-based products require manual reset capabil-ity, allowing the operator, a test technician, or external logic circuitry to initiate a reset. A logic low on MR asserts reset. Reset remains asserted while MR is low, and for the Reset Active Timeout Period (t RP) after MR returns high. This input has an internal 20kΩ pull-up resistor, so it can be left open if it is not used. MR can be driven with TTL or CMOS-logic levels, or with open-drain/collector outputs. Connect a normally open momentary switch from MR to GND to create a manual-reset function; external debounce circuitry is not required. If MR is driven from long cables or if the device is used in a noisy environment, connecting a 0.1μF capacitor from MR to ground provides additional noise immunity.Reset Threshold AccuracyThe MAX811/MAX812 are ideal for systems using a 5V ±5% or 3V ±5% power supply with ICs specified for 5V ±10% or 3V ±10%, respectively. They are designed to meet worst-case specifications over temperature. The reset is guaranteed to assert after the power supply falls out of regulation, but before power drops below the minimum specified operating voltage range for the system ICs. The thresholds are pre-trimmed and exhibit tight dis-tribution, reducing the range over which an undesirable reset may occur.PINNAME FUNCTION MAX811MAX81211GND Ground2—RESET Active-Low Reset Output. RESET remains low while V CC is below the reset threshold or while MR is held low. RESET remains low for the Reset Active Timeout Period (t RP) after the reset conditions are terminated.—2RESET Active-High Reset Output. RESET remains high while V CC is below the reset threshold or while MR is held low. RESET remains high for Reset Active Timeout Period (t RP) after the reset conditions are terminated.33MR Manual Reset Input. A logic low on MR asserts reset. Reset remains asserted as long as MR is low and for 180ms after MR returns high. This active-low input has an internal 20kΩpull-up resistor. It can be driven from a TTL or CMOS-logic line, or shorted to ground with a switch. Leave open if unused.44V CC+5V, +3.3V, or +3V Supply Voltage with Manual Reset InputPin DescriptionApplications InformationNegative-Going V CC TransientsIn addition to issuing a reset to the μP during power-up, power-down, and brownout conditions, the MAX811/ MAX812 are relatively immune to short duration negative-going V CC transients (glitches).Figure 1 shows typical transient durations vs. reset com-parator overdrive, for which the MAX811/MAX812 do not generate a reset pulse. This graph was generated using a negative-going pulse applied to V CC, starting above the actual reset threshold and ending below it by the magnitude indicated (reset comparator overdrive). The graph indicates the typical maximum pulse width a negative-going V CC transient may have without causing a reset pulse to be issued. As the magnitude of the tran-sient increases (goes farther below the reset threshold), the maximum allowable pulse width decreases. Typically, a V CC transient that goes 125mV below the reset thresh-old and lasts 40μs or less (MAX81_L/M) or 20μs or less (MAX81_T/S/R) will not cause a reset pulse to be issued.A 0.1μF capacitor mounted as close as possible to V CC provides additional transient immunity.Ensuring a Valid RESET OutputDown to V CC = 0VWhen V CC falls below 1V, the MAX811 RESET output no longer sinks current—it becomes an open circuit. Therefore, high-impedance CMOS-logic inputs connected to the RESET output can drift to undetermined voltages. This presents no problem in most applications, since most μP and other circuitry is inoperative with V CC below 1V. However, in applications where the RESET output must be valid down to 0V, adding a pulldown resistor to the RESET pin will cause any stray leakage currents to flow to ground, holding RESET low (Figure 2). R1’s value is not critical; 100kΩ is large enough not to load RESET and small enough to pull RESET to ground.A 100kΩ pull-up resistor to V CC is also recommended for the MAX812 if RESET is required to remain valid for V CC < 1V.Figure 1. Maximum Transient Duration without Causing a Reset Pulse vs. Comparator Overdrive Figure 2. RESET Valid to V CC = Ground Circuitwith Manual Reset InputInterfacing to μPs with Bidirectional Reset PinsμPs with bidirectional reset pins (such as the Motorola 68HC11 series) can contend with the MAX811/MAX812 reset outputs. If, for example, the MAX811 RESET output is asserted high and the μP wants to pull it low, indeter -minate logic levels may result. To correct such cases, connect a 4.7kΩ resistor between the MAX811 RESET (or MAX812 RESET) output and the μP reset I/O (Figure 3). Buffer the reset output to other system components.Figure 3. Interfacing to μPs with Bidirectional Reset I/Owith Manual Reset InputChip InformationTRANSISTOR COUNT: 341with Manual Reset Input Package InformationFor the latest package outline information and land patterns (footprints), go to /packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.PACKAGE TYPE PACKAGE CODE OUTLINE ND PATTERN NO.4 SOT143U4+121-005290-0183REVISION NUMBERREVISION DATE DESCRIPTIONPAGES CHANGED56/15Updated Benefits and Features and Package Information sections 1, 865/18Updated Absolute Maximum Ratings2Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.with Manual Reset InputRevision HistoryFor pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https:///en/storefront/storefront.html.。

MAXIM MAX3188 MAX3189 数据手册

For free samples and the latest literature, visit or phone 1-800-998-8800.For small orders, phone 1-800-835-8769.General DescriptionThe MAX3188/MAX3189 single RS-232 transmitters in a SOT23-6 package are for space- and cost-constrained applications requiring minimal RS-232 communications.These devices consume only 150µA of supply current from ±4.5V to ±6V supplies. RS-232 data transmission is guaranteed up to 250kbps with the MAX3188 and up to 1Mbps with the MAX3189.The MAX3188/MAX3189 transmitters are inverting level translators that convert CMOS-logic levels to 5V EIA/TIA-232 levels. They feature a shutdown input that reduces current consumption to only 1µA and forces the transmitter output into a high-impedance state. The MAX3188/MAX3189 transmitters have a standard inverting output.ApplicationsDiagnostic Ports Telecommunications Networking Equipment Set-Top Boxes Digital Cameras Hand-Held EquipmentFeatureso Small 6-Pin SOT23 Package o 150µA Supply Currento Shutdown Reduces Supply Current to 1µA o Guaranteed Data Rate1Mbps (MAX3189)250kbps (MAX3188)o Three-State RS-232 Transmitter Output o No External Components RequiredMAX3188/MAX31891Mbps, 1µA RS-232 Transmitters in SOT23-6________________________________________________________________Maxim Integrated Products 1Typical Operating Circuit19-1628; Rev 0; 2/00Pin ConfigurationOrdering InformationM A X 3188/M A X 31891Mbps, 1µA RS-232 Transmitters in SOT23-62_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V CC = +4.5V to +6V, V EE = -4.5V to -6V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5.4V, V EE = -5.4V,and T A = +25°C.) (Note 2)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Note 1:V CC and V EE can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.A V CC to GND (Note 1)................................................-0.3V to +7V V EE to GND (Note 1)................................................+0.3V to –7V V CC to V EE (Note 1).............................................................+13V TIN, SHDN to GND...................................................-0.3V to +7V TOUT to GND (SHDN = GND)..........................................±13.2V TOUT to GND (SHDN = V CC )................................................±7V Output Short-Circuit Duration.....................................ContinuousContinuous Power Dissipation (T A = +70°C)6-Pin SOT23 (derate 8.7mW/°C above +70°C)..........691mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature......................................................+150°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering, 10s).................................+300°CMAX3188/MAX31891Mbps, 1µA RS-232 Transmitters in SOT23-6_______________________________________________________________________________________301.00.51.52.02.500.40.30.10.20.50.60.70.80.9 1.0SUPPLY CURRENT vs. DATA RATE(C L = 150pF)DATA RATE (Mbps)S U P P L Y C U R R E N T (m A )432156700.40.30.10.20.50.60.70.80.9 1.0SUPPLY CURRENT vs. DATA RATE(C L = 1000pF)DATA RATE (Mbps)S U P P L Y C U R R E N T (m A )0.51.01.52.02.53.03.54.005001000150020002500MAX3188 SUPPLY CURRENT vs. OUTPUT CAPACITANCEOUTPUT CAPACITANCE (pF)S U P P L Y C U R R E N T (m A )0428612101401000500150020002500MAX3189 SUPPLY CURRENT vs. OUTPUT CAPACITANCEOUTPUT CAPACITANCE (pF)S U P P L Y C U R R E N T (m A )428612101401000500150020002500MAX3188SLEW RATE vs. OUTPUT CAPACITANCEOUTPUT CAPACITANCE (pF)S L E W R A T E (V /µs)2010504030807060901000500150020002500MAX3189SLEW RATE vs. OUTPUT CAPACITANCEOUTPUT CAPACITANCE (pF)S L E W R A T E (V /µs )SHDNTOUT 0-5V+5V0+2V 1µs/divMAX3188TRANSMITTER OUTPUT SHUTDOWN WAVEFORMC L = 150pFSHDNTOUT 0-5V+5V0+2V 1µs/divMAX3189TRANSMITTER OUTPUT SHUTDOWN WAVEFORMC L = 150pFTypical Operating Characteristics(V CC = +5.4V, V EE = -5.4V, R L = 3k Ω, T A = +25°C, unless otherwise noted.)Detailed DescriptionThe transmitter is an inverting level translator that converts CMOS-logic levels to 5V EI A/TI A-232 levels.The MAX3188 guarantees a 250kbps data rate, and the MAX3189 guarantees a 1Mbps data rate with worst-case loads of 3k Ωin parallel with 1000pF. The transmitter input does not have a pull-up resistor and should be connected to GND if unused.ShutdownThe MAX3188/MAX3189 feature a shutdown input.Drive SHDN low to reduce the supply current to 1µA (max). Shutdown also forces TOUT into a high-impedance state that allows the signal line to be safely controlled by other transmitters. Drive SHDN high for normal operation.Power-Supply DecouplingI n most circumstances, 0.1µF bypass capacitors are adequate for power-supply decoupling. Connect the bypass capacitors as close to the IC as possible.Applications InformationPower-Supply SourcesThe MAX3188/MAX3189 require ±4.5V to ±6V dual supplies. For applications where these supply voltages are not present, a DC-DC converter must be added.Due to the devices’ low current consumption, a charge pump can provide the proper supply voltages and requires a minimal amount of board space and cost.When using another RS-232 device containing an internal regulated charge pump (Table 1), the MAX3188/MAX3189 may be powered from the internal charge pump (Figure 2). This eliminates the need for additional external DC-DC converters to generate the required ±4.5V to ±6V dual supplies.M A X 3188/M A X 31891Mbps, 1µA RS-232 Transmitters in SOT23-64_______________________________________________________________________________________Pin DescriptionNegative Supply Voltage V EE 5Positive Supply VoltageV CC6RS-232 Transmitter Output TOUT 4TTL/CMOS Transmitter Input TIN 3PIN GroundGND 2Active-Low Shutdown. Pull low to reduce the supply current and to force TOUT into a high-impedance state.SHDN 1FUNCTIONNAME Figure 1. Transmitter Propagation-Delay TimingMAX3188/MAX31891Mbps, 1µA RS-232 Transmitters in SOT23-6_______________________________________________________________________________________5Table 1. RS-232 Devices with Internal Regulated Charge PumpsAutoShutdown and AutoShutdown Plus are trademarks of Maxim Integrated Products.M A X 3188/M A X 31891Mbps, 1µA RS-232 Transmitters in SOT23-66_______________________________________________________________________________________Figure 2. Powering the MAX3188/MAX3189Chip InformationTRANSISTOR COUNT: 111MAX3188/MAX31891Mbps, 1µA RS-232 Transmitters in SOT23-6_______________________________________________________________________________________7Package InformationM A X 3188/M A X 31891Mbps, 1µA RS-232 Transmitters in SOT23-6Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.8_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2000 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.NOTES。

MAX16821

只需增添三个功率MOSFET，单通道降压转换器即可驱动投影仪的RGB LED摘要：本应用笔记介绍了低功耗投影仪的RGB LED驱动器参考设计。

该设计利用单片MAX16821 HB LED驱动器在每一时刻驱动一个RGB LED。

这种方法减少了元件数量，获得高效、小巧且经济的设计。

文中给出了电路板布局和测试结果。

引言本应用笔记提供了一个低功耗投影仪RGB LED驱动器的参考设计。

基于单芯片MAX16821构建大电流LED驱动器，能够为一组降压驱动的RGB LED 提供高达10A的电流，通/断时间小于1µs。

某一时刻只驱动一个彩色LED，RGB按比例共用PWM周期。

LED驱动器技术指标•输入电源电压：10V至15V•LED驱动电流：10A•LED正向偏压：4.5V至6V•LED电流上升/下降时间：< 1µs•LED电流纹波：10%峰峰值，最大值输入•V IN (J4)：电源输入•PWMR、PWMB、PWMG (J8的引脚1、3和4)：RGB PWM输入信号，幅值应为3.3V至5V。

当输出的上升/下降时间保持在1µs以内时，任何超出2µs的PWM周期均可使用。

某一时刻只有上述三个信号之一为高电平。

•PWMN (J8的引脚4)：PWMR、PWMG和PWMB进行逻辑NOR。

只有所有三个PWM信号均为低电平时，PWMN为高电平。

•ON/OFF (J1)：保持开路或驱动至+5V使能驱动器，连接至GND禁用电路板工作。

输出•LEDR、LEDG、LEDB (J5、J6和J7)：10A RGB LED输出。

将LED+连接至引脚3、4和5；将LED-连接至引脚6、7和8。

•OUTV (J2)：提供与LED电流成比例的信号，OUTV上的电压为R12||R16电压的135倍。

•V IN_OUT (J3)：输入电源电压，用于连接至其它电路板。

引脚1和2为V IN+；引脚3和4为GND。