MAX358CWE-T中文资料
MAX832中文资料
NUAL KIT MA ATION U EET L H A S V A E T WS DA FOLLO
___________________________Features
o Input Range: Up to 30V o 1A On-Chip Power Switch o Adjustable Output (MAX830) Fixed Outputs: 5V (MAX831) 3.3V (MAX832) 3V (MAX833) o 100kHz Switching Frequency o Excellent Dynamic Characteristics o Few External Components o 8mA Quiescent Current o 16-Pin SO Package o Evaluation Kit Available
__________Typical Operating Circuit
__________________Pin Configuration
TOP VIEW
INPUT 8V TO 30V 100µF VIN VSW
100µH*
OUTPUT 5V AT 1A
V IN 1 V IN 2 V IN 3
16 V SW 15 V SW 14 V SW
_______________________Applications
Distributed Power from High-Voltage Buses High-Current, High-Voltage Step-Down Applications Multiple-Output Buck Converter
MAX831
VC 10k 0.047µF SENSE
MAX13085EESA-T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 .)。
TS358中文资料
TS358Dual Operating AmplifierSupply Voltage Range 3 V to 32VDual Channel AmplifierGeneral DescriptionUtilizing the circuit designs perfected for recently introduced Quad Operational Amplifiers, these dual operational amplifiers have several distinct advantages over standard operational amplifier types in single supply applications. They can operate at supply voltages as low as 3.0 Volts or as high as 32 Volts with quiescent currents about one fifth of those associated with the LM741 (on a pet amplifier basis). The common mode input range includes the negative supply, thereby eliminating the necessity for external biasing components in many applications.The TS358 is equivalent to one half of TS324, and output voltage range also includes the negative supply voltage. The TS358 is offered in 8 pin SOP-8 and DIP-8 package.Block DiagramFeaturesShort circuit protected outputs True differential input stage Single supply operation: 3V to 32VLow input bias currentsInternally compensated Common mode range extends to negative supply Single and split supply operationSimilar performance to the popular MC1558Ordering InformationPart No.Operating Temp.(Ambient)PackageTS358CD DIP-8 TS358CS-20 ~ +85 oCSOP-8 Absolute Maximum RatingSupply VoltageVcc, Vcc/Vee+32 or ±16 Vdc Differential Input Voltage (note 1)V IDR 32 VdcInput Common Mode Voltage Range (note 2) Input Forward Current (note 3) V ICR Iif -0.3 to 3250 Vdc mA Output Short Circuit Duration Isc ContinuousmA Power Dissipation @ Ta=25 o CDerate above 25 oC1/R θja 570 5.7 mWmW/ oC Operating Junction Temperature Range T J 0 ~ +125 o C Storage Temperature RangeT STG-65 ~ +150oCNOTE :1. Split Power Supplies.2. For supply. Voltages less than 32V for the TS358 the absolute maximum input voltage is equal to the supply voltage.3. This input current will only exist when the voltage is negative at any of the input leads. Normal output states will reestablish when the input voltage returns to a voltage greater than -0.3V.Pin assignment:1. Output 2. Input A (-) 3. Input A (+) 4. Gnd5. Input B (+)6. Input B (-)7. Output B8. VccElectrical Characteristics(V CC = 5V, Ta=25 o C; unless otherwise specified.) Characteristics Symbol Min Typ Max UnitInput Offset VoltageV CC = 5.0V to 30V, V IC = 0V to Vcc -1.7 V, Vo= 1.4V, R S = 0Ω T LOW ≤ Ta ≤T HIGHVio-- -- 2.0 -- 5.0 7.0 mVAverage Temperature Coefficient of Input Offset Voltage Iio/T △△-- 7.0 -- uV/o CInput Offset Current T LOW ≤ Ta ≤T HIGHIio -- -- 5.0 -- 50 150 nAAverage Temperature Coefficient of input Offset Current Iio/T△△-- 10 -- pA/o CInput Bias Current T LOW ≤ Ta ≤T HIGHI IB-- 45 50 -250 -500 uAInput Common-Mode Voltage Range (Note1) V CC = 30 VV CC = 30 V, T LOW ≤ Ta ≤T HIGH V ICR 0 0 -- -- 28.3 28 V Differential Input Voltage Range V IDR -- -- V CC VLarge Signal Open-Loop Voltage Gain R L = 2.0K, V CC =15V, For Large V O Swing, T LOW ≤ Ta ≤T HIGH A VOL 25 15100 ---- --V/mV Channel Separation 1.0 KHz to 20KHz-- -- -120 -- dB Common Mode Rejection Ratio R S ≤ 10 k ΩCMRR 65 70 -- dB Power Supply Rejection Ratio PSRR 65 100 -- dB Output Voltage Range, RL = 2K Ω V OR 0 -- 3.3 VOutput Voltage -- High Limit V CC = 30 V, R L = 2 k Ω V CC = 30 V, R L = 10 k Ω V OH 26 27-- 28-- --VOutput Voltage -- Low Limit V CC = 5.0 V, R L = 10 k Ω V OL -- 5.0 20mVOutput Source Current V ID =+1.0V,V CC =15V I O+ 20 40 -- mAOutput Sink Current V ID = -1.0 V, V CC = 15 V V ID = -1.0 V, V O = 200 mVI O- 10 12 20 50 -- -- mA uAOutput Short Circuit to Ground (Note 2) I OS -- 40 60 mAPower Supply Current , V CC = 30 VV O = 0 V, R L = ∞V CC = 5.0 V, V O = 0 V, R L = ∞ I CC ---- 1.50.7 3.01.2 mA Notes :1. The input common mode voltage or either input signal voltage should not be allowed to go negative by more than 0.3 V. The upper end of the common mode voltage range is Vcc 17V, but either or both inputs can go to +32V.2. Short circuits from the output to Vcc can cause excessive heating and eventual destruction. Destructive dissipation can recruit from simultaneous shorts on all amplifiers.Circuit DescriptionThe TS358 made using two internally compensated, two-stage operational amplifiers. The first stage performs not only the first stage gain function but also performs the level shifting and transconductance reduction functions. By reducing the transconductance, a smaller compensation capacitor (only 5.0pF) can be employed, thus saving chip area. Another feature of this input stage is that the input common mode range can include the negative supply or ground, in single supply operation, without saturating either the input devices or the differential to single-ended converter. The second stage consists of a standard current source load amplifier stage.Each amplifier is biased from an internal-voltage regulator, and which has a low temperature coefficient thus giving each amplifier good temperature characteristics as well as excellent power supply rejection.Circuit DescriptionElectrical Characteristics Curve。
公司(普飞诺)新推IC及替换型号
SOP16封装，EC：0至70摄氏度/将TTL信号转为232信号，功耗 更低可以3.3V供电 特点：232通信距离为25M左右，485通信距离为1200M左右。外围电路简单。 四：应用范围
一：线性稳压IC可以应用于：电池供电玩具，工业控制器，仪器仪表，医疗设备，电脑，电话，路由 器，门禁，安防，家用电器控制板等。
PFN3232CSE PFN3232ESE PFN202CSE
SOP16封装，CSA：0至70摄氏度/TTL信号转为232信号，比232 功耗更低 SOP16封装，ESA：-40至+85摄氏度/TTL信号转为232信号，比 232功耗更低
CSA：0至70摄氏度/将TTL信号转为232信号，与232外围电容 不同 SOP16封装，ESA：-40至+85摄氏度/将TTL信号转为232信号， PFN202ESE 与232外围电容不同 SOP16封装，EE：-40至+85摄氏度/将TTL信号转为232信号， PFN202EESE 功耗更低可以3.3V供电 PFN202ECSE
规格 SOP8封装，CSA：0至70摄氏度/将TTL信号转为485信号 SOP8封装，ESA：-40至+85摄氏度/将TTL信号转为485信号 SOP16封装，CSA：0至70摄氏度/将TTL信号转为232信号 SOP16封装，ESA：-40至+85摄氏度/将TTL信号转为232信号
5： 6： 7： 8： 9： 10：
二：开关式降压IC 序号 型号 规格 1： P2575s-3.3 SOT263封装，固定输出+3.3V 2： P2575T-3.3 TO220封装，固定输出+3.3V 3： P2575S-5.0 SOT263封装，固定输出+5V 4： P2575T-5.0 TO220封装，固定输出+5V 5： P2575S-12 SOT263封装，固定输出+12V 6： P2575T-12 TO220封装，固定输出+12V 7： P2575S-ADJ SOT263封装，输出可调 8： P2575T-ADJ TO220封装，输出可调 9： P2576S-3.3 SOT263封装，固定输出+3.3V 10： P2576T-3.3 TO220封装，固定输出+3.3V 11： P2576S-5.0 SOT263封装，固定输出+5V 12： P2576T-5.O TO220封装，固定输出+5V 13： P2576S-12 SOT263封装，固定输出+12V 14： P2576T-12 TO220封装，固定输出+12V 15： P2576S-ADJ SOT263封装，输出可调 16： P2576T-ADJ TO220封装，输出可调 17： P2596S-3.3 SOT263封装，固定输出+3.3V 18： P2596T-3.3 TO220封装，固定输出+3.3V 19： P2596S-5.0 SOT263封装，固定输出+5V 20： P2596T-5.0 TO220封装，固定输出+5V 21： P2596S-12 SOT263封装，固定输出+12V 22： P2596T-12 TO220封装，固定输出+12V 23： P2596T-ADJ TO220封装，输出可调 24： P2596S-ADJ SOT263封装，输出可调 特点：开关式降压IC，转换效率高，2575输出1A，2576/2596系列最大可输出3A，如2575/2576尾缀带有 HV输入可高达DC60V。默认输入40V。2596与2576两点不同1：开关频率2596为150K，2576为52K。2：259 最大输入为40V。 三：通信IC 序号 型号 1： PFN485CSA 2： PFN485ESA 3： PFN232CSE 4： PFN2 LM2575T-3.3 LM2575S-5.0 LM2575T-5.0 LM2575S-12 LM2575T-12 LM2575S-ADJ LM2575T-ADJ LM2576S-3.3 LM2576T-3.3 LM2576S-5.0 LM2576T-5.O LM2576S-12 LM2576T-12 LM2576S-ADJ LM2576T-ADJ LM2596S-3.3 LM2596T-3.3 LM2596S-5.0 LM2596T-5.0 LM2596S-12 LM2596T-12 LM2596T-ADJ LM2596S-ADJ 出3A，如2575/2576尾缀带有 为150K，2576为52K。2：2596
max3485esa中文资料
General Description The MAX3483, MAX3485, MAX3486, MAX3488,MAX3490, and MAX3491 are 3.3V , low-power transceivers forRS-485 and RS-422 communication. Each part containsone driver and one receiver. The MAX3483 and MAX3488feature slew-rate-limited drivers that minimize EMI andreduce reflections caused by improperly terminatedcables, allowing error-free data transmission at data ratesup to 250kbps. The partially slew-rate-limited MAX3486transmits up to 2.5Mbps. The MAX3485, MAX3490, andMAX3491 transmit at up to 10Mbps.Drivers are short-circuit current-limited and are protectedagainst excessive power dissipation by thermal shutdowncircuitry that places the driver outputs into a high-imped-ance state. The receiver input has a fail-safe feature thatguarantees a logic-high output if both inputs are opencircuit.The MAX3488, MAX3490, and MAX3491 feature full-duplex communication, while the MAX3483, MAX3485, andMAX3486 are designed for half-duplex communication.Applications ●Low-Power RS-485/RS-422 Transceivers ●Telecommunications ●Transceivers for EMI-Sensitive Applications ●Industrial-Control Local Area NetworksFeatures●Operate from a Single 3.3V Supply—No Charge Pump!●Interoperable with +5V Logic ●8ns Max Skew (MAX3485/MAX3490/MAX3491)●Slew-Rate Limited for Errorless Data Transmission (MAX3483/MAX3488)●2nA Low-Current Shutdown Mode (MAX3483/MAX3485/MAX3486/MAX3491)●-7V to +12V Common-Mode Input Voltage Range ●Allows up to 32 Transceivers on the Bus ●Full-Duplex and Half-Duplex Versions Available ●Industry Standard 75176 Pinout (MAX3483/MAX3485/MAX3486)●Current-Limiting and Thermal Shutdown for Driver Overload Protection 19-0333; Rev 1; 5/19Ordering Information continued at end of data sheet.*Contact factory for for dice specifications.PARTTEMP . RANGE PIN-PACKAGE MAX3483CPA0°C to +70°C 8 Plastic DIP MAX3483CSA0°C to +70°C 8 SO MAX3483C/D0°C to +70°C Dice*MAX3483EPA-40°C to +85°C 8 Plastic DIP MAX3483ESA-40°C to +85°C 8 SO MAX3485CPA0°C to +70°C 8 Plastic DIP MAX3485CSA0°C to +70°C 8 SO MAX3485C/D0°C to +70°C Dice*MAX3485EPA-40°C to +85°C 8 Plastic DIP MAX3485ESA -40°C to +85°C 8 SO PARTNUMBERGUARANTEED DATA RATE (Mbps)SUPPLY VOLTAGE (V)HALF/FULL DUPLEX SLEW-RATE LIMITED DRIVER/RECEIVER ENABLE SHUTDOWN CURRENT (nA)PIN COUNT MAX34830.25 3.0 to 3.6Half Yes Yes 28MAX348510Half No No 28MAX34862.5Half Yes Yes 28MAX34880.25Half Yes Yes —8MAX349010Half No No —8MAX349110Half No Yes 214MAX3483/MAX3485/MAX3486/MAX3488/MAX3490/MAX3491Selection TableOrdering Information找电子元器件上宇航军工Figure 1. MAX3483/MAX3485/MAX3486 Pin Configuration and Typical Operating Circuit Figure 2. MAX3488/MAX3490 Pin Configuration and Typical Operating Circuit Figure 3. MAX3491 Pin Configuration and Typical Operating CircuitMAX3486/MAX3488/MAX3490/MAX3491True RS-485/RS-422 TransceiversFigure 22. MAX3488/MAX3490/MAX3491 Full-Duplex RS-485 NetworkFigure 23. Line Repeater for MAX3488/MAX3490/MAX3491MAX3486/MAX3488/MAX3490/MAX3491True RS-485/RS-422 Transceivers。
MAX31855汉语版
MAX31855冷端补偿热电偶至数字输出转换器概述MAX31855具有冷端补偿，将K、J、N、T或E型热电偶信号转换成数字量(如果使用S和R型热电偶，请联系工厂)。
器件输出14位带符号数据，通过SPI TM兼容接口、以只读格式输出。
转换器的温度分辨率为0.25℃，最高温度读数为+1800℃，最低温度读数为-270℃，对于K型热电偶，温度范围为-200℃至+700℃，保持±2℃精度。
对于整个量程范围的精度及其它类型的热电偶，请参考Thermal Characteristics规格。
特性∑ 冷端补偿∑ 14位、0.25℃分辨率∑ 提供K、J、N、T或E型热电偶器件版本（如果使用S和R型热电偶，请联系工厂）（见表1）∑ 简单的SPI兼容接口(只读)∑ 检测热电偶对GND或V CC短路∑ 检测热电偶开路定购信息在数据资料的最后给出。
应用工业电器设备HVAC汽车相关型号以及配合该器件使用的推荐产品，请参见：MAX31855.relatedSPI是Motorola, Inc.的商标有关价格，供货及订购信息，请联络Maxim销售中心：1888 629 4642，或是直接访问网址：MAX3855冷端补偿热电偶至数字输出转换器详细说明MAX31855为热电偶至数字输出转换器，内置14位模/数转换器(ADC)。
器件带有冷端补偿检测修正、数字控制器、SPI兼容接口，以及相关的控制逻辑，在温度控制器、过程控制或监测系统中设计用于配合外部微控制器(µC)工作。
提供多个版本的器件，每个版本针对特定的热电偶类型(K、J、N、T或E型，如果使用S和R型，请联系工厂)进行优化和调整。
热电偶类型以器件型号后缀表示(例如MAX31855K)，型号选择请参见定购信息表。
温度转换器件包括信号调理硬件电路，将热电偶信号调整到与ADC输入通道相匹配的电压。
T+和T-输入连接到内部电路，可减小热电偶引线引入的噪声误差。
将热电偶电压转换为等效的温度值之前，需要补偿热电偶冷端(器件环境温度)与0℃实际参考值的差异。
max3485中文资料
MAX3483, MAX3485, MAX3486, MAX3488, MAX3490以及MAX3491是用于RS-485与RS-422通信的3.3V，低功耗收发器，每个器件中都具有一个驱动器和一个接收器。
MAX3483和MAX3488具有限摆率驱动器，可以减小EMI，并降低由不恰当的终端匹配电缆引起的反射，实现最高250kbps的无差错数据传输。
MAX3486的驱动器摆率部分受限，可以实现最高2.5Mbps的传输速率。
MAX3485,MAX3490和MAX3491则可以实现最高10Mbps 的传输速率。
驱动器具有短路电流限制，并可以通过热关断电路将驱动器输出置为高阻状态，防止过度的功率损耗。
接收器输入具有失效保护特性，当输入开路时，可以确保逻辑高电平输出。
使用MAX3488, MAX3490和MAX3491可以实现全双工通信，而MAX3483，MAX3485与MAX3486则为半双工应用设计。
这篇文章介绍的就是MAX34852 芯片介绍2.1 主要特点半双工速率：10Mbps限摆率：NO接收允许控制：YES 关断电流：2 nA引脚数：82.2 引脚配置根据上图、上表可知：DE和RO为使能管脚。
DE为低电平、RE为低电平时为接收；DE 为高电平、RE为高电平时为发送；RO和DI为数据管脚。
RO为接收，DI为发送；因此我们经常将DE和RE直接连接，用一个IO口控制（见3.2 电路实现）。
3.1 应用场景工业控制局域网集成服务数字网络低功耗RS-485/RS-422收发器（我做的几个项目都是该功能）分组交换技术电信用于EMI敏感应用的收发器3.2 电路实现485是2线式，两个485接口的设备相连通过A、B两根线即可（也就是至少2个485芯片），连接方式如下图所示：我们使用MAX3485一般是用下图电路：从上图中我们可以看到：RO直接和TTL电平的UART_RX（或模拟串口的RX）相连，DI直接和TTL电平的UART_TX（或模拟串口的TX）相连，R34为1K。
max3485中文资料
MAX3483，MAX3485，MAX3486，MAX3488，MAX3490以及MAX3491是用于RS-485与RS-422通信的3.3V，低功耗收发器，每个器件中都具有一个驱动器和一个接收器。
MAX3483和MAX3488具有限摆率驱动器，可以减小EMI，并降低由不恰当的终端匹配电缆引起的反射，实现最高250kbps的无差错数据传输。
MAX3486的驱动器摆率部分受限，可以实现最高2.5Mbps的传输速率。
MAX3485，MAX3490和MAX3491则可以实现最高10Mbps 的传输速率。
驱动器具有短路电流限制，并可以通过热关断电路将驱动器输出置为高阻状态，防止过度的功率损耗。
接收器输入具有失效保护特性，当输入开路时，可以确保逻辑高电平输出。
特性●半双工●速率：10Mbps●限摆率：NO●接收允许控制：YES●关断电流：2nA●引脚数：8参数暂无MAX3485的参数信息引脚图与功能MAX3485ESA品牌厂家：Maxim Integrated（美信），MAX3485ESA 渠道分销商：2家，现货库存数量：1542 PCS，MAX3485ESA价格参考：¥8.121元。
Maxim Integrated（美信）MAX3485ESA参数（SOIC 8Pin 3V 10Mbps，封装：SOIC），MAX3485ESA中文资料和引脚图及功能表说明书PDF下载（17页，409KB），您可以在MAX3485ESA接口芯片规格书Datesheet数据手册中，查到MAX3485ESA引脚图及功能的应用电路图电压和使用方法，MAX3485ESA典型电路教程。
MAX3485ESA可以用什么代替？代换型号如：MAX3485CSA+T、MAX3485CSA替代换，MAX3485ESA芯片系列中文手册中包含MAX3485ESA各引脚定义说明介绍及MAX3485ESA引脚功能图解，用户中文手册MAX3485ESA芯片手册PDF下载（17页，409KB）。
LM358应用电路资料及引脚图
LM358应用电路资料及引脚图之迟辟智美创作LM358是经常使用的双运放,这里我们介绍一下他的一些资料以及简单电路应用等,有什么问题请去电子论坛.简介:LM358里面包括有两个高增益、自力的、内部频率赔偿的双运放，适用于电压范围很宽的单电源，而且也适用于双电源工作方式，它的应用范围包括传感放年夜器、直流增益模块和其他所有可用单电源供电的使用运放的处所使用.lm358引脚图及引脚功能LM358封装有塑封8引线双列直插式和贴片式两种.LM358的特点:. 内部频率赔偿. 低输入偏流. 低输入失调电压和失调电流. 共模输入电压范围宽，包括接地. 差模输入电压范围宽，即是电源电压范围. 直流电压增益高(约100dB). 单元增益频带宽(约1MHz). 电源电压范围宽：单电源(3—30V)；. 双电源(±1.5 一±15V). 低功耗电流，适合于电池供电. 输出电压摆幅年夜(0 至Vcc-1.5V)LM358稳压电路制作电路原理：本稳压器的核心器件采纳LM358.电路原理如下图所示.它主要由供电、基准电压、电压取样比力等组成.LM358稳压电路应用:市电从变压器的1、2头输入，3、4头为自耦调压抽头，5、6头为控制电路的电源及取样抽头.市电电压正常时，因C点电压始终为3V（即R1降压DW稳压所得），A、B点均年夜于3 V，故A1、A2（lm358芯片）输出低电平；当市电电压下降时，5、6头的电压也随之下降，A点电压也跟着下降，当A点电压下降到低于3V时，A1输出高电平，使三极管V1饱和导通，继电器K1吸合，将调压器输出调于1、3头；当市电电压继续下降时，同理B点电压低于3V时，（VA反之，如果电压升高时，B点电压也随之升高，当B点电压高于3V时，A2输出低电平，V2截止，H2释放，输出端调至1、3头；当市电电压继续升高时，A点电压高于3V，A1输出低电平，V1截止，K1释放，输出端调至1、2头.A1、A2为运放，在这里作电压比力器用；IC1为三端稳压块，它为运放及继电器提供供电电源；VD5、VD6为呵护二极管.lm358红外探测报警器制作.该报警器的核心部件采纳LM358，他能探测人体发出的红外线，当人进入报警器的监视区域内，即可发出报警声，适用于家庭、办公室、仓库、实验室等比力重要场所防盗报警.电路原理如下：LM358应用电路由红外线传感器、信号放年夜电路、电压比力器、延时电路和音响报警电路等组成.红外线探测传感器IC1 探测到前方人体辐射出的红外线信号时，由IC1的②引脚输出微弱的电信号，经三极管VT1 等组成第一级放年夜电路放年夜，再通过C2输入到运放IC2（lm358）中进行高增益、低噪声放年夜，此时由IC2①引脚输出的信号已足够强.IC3 （LM358）作电压比力器，它的第⑤引脚由R10、VD1提供基准电压，当IC2①引脚输出的信号电压达到IC3 的⑥引脚时，两个输入真个电压进行比力，此时IC3的⑦引脚由原来的高电平酿成低电平.IC4（LM358）为报警延时电路，R14 和C6 组成延时电路，其时间约为1 分钟.当IC3的⑦引脚酿成低电平时，C6 通过VD2 放电，此时IC4 的②引脚酿成低电平，它与IC4的③引脚基准电压进行比力，当它低于其基准电压时IC4 的①引脚酿成高电平，VT2导通，讯响器BL 通电发出报警声.人体的红外线信号消失后，IC3 的⑦引脚又恢复高电平输出，此时VD2 截止.由于C6两真个电压不能突变，故通过R14 向C6 缓慢充电，当C6两真个电压高于其基准电压时，IC4 的①引脚才酿成低电平，时间约为1 分钟，即继续1分钟报警.这是一个典范的lm358应用电路，希望年夜家在此器件运用中，举一反3，发掘出更多有用的电路来.由VT3、R20 、C8 组成开机延时电路，时间也约为1 分钟，它的设置主要是防止使用者开机后立即报警，好让使用者有足够的时间离开监视现场，同时可防止停电后又来电时发生误报.元件选择与电路制作元器件清单:编号名称型号数量编号名称型号数量R1 电阻47K 1 C10 电解电容470u/25V 1R2 电阻1M 1 C11 涤纶电容0.1u 1R3 电阻1K 1 VD1－VD5 整流二极管IN4001 5R4 电阻 4.7K 1 U 全桥2A/50V 1R5 R6 R9 R12 R13R15 电阻100K (R12 为线性微调电阻) 6 VT1 晶体三极管9014 1R7 R10 R11 R17 电阻10K 4 VT2 晶体三极管MPSA13 0.5A 30V 1R8、R16 电阻300K 2 VT3 晶体三极管8050 1R14电阻470K 1 IC1 红外线传感器Q74 1R18 电阻2.4K 1 IC2 运放LM358 1R19电阻220Ω 1 IC3 比力器LM393 1R20 电阻560K 1 IC4 三端稳压器78L06 1C1C2 C6 C8 C9 电解电容47u/16V (C2 、C5 用钽电解）5 BL 电磁讯响器U=12V 1C3 C5电解电容22u/16V 2 T 电源变压器12V 5W 1C4 涤纶电容0.01u 1 S 钮子开关1C7电解电容220u/16V1本机静态工作电流约10mA，接通电源约1分钟后进入守候状态，只要有人进入监视区便会报警，人离开后约1分钟停止报警.如果将讯响器改为继电器驱动其它装置即作为其它控制用.装置无误，接上电源进行调试，让一个人在探测器前方7－10m处走动，调整电路中的R12 ，使讯响器报警即可.其它部份只要元器件质量良好且焊接无误，几乎不用调试即可正常工作.。
最新LM358功能 中文资料
LM358功能中文资料LM358是常用的双运放,这里我们介绍一下他的一些资料以及简单电路应用等.简介:LM358里面包括有两个高增益、独立的、内部频率补偿的双运放，适用于电压范围很宽的单电源，而且也适用于双电源工作方式，它的应用范围包括传感放大器、直流增益模块和其他所有可用单电源供电的使用运放的地方使用。
〈LM358引脚图及引脚功能〉LM358封装有塑封8引线双列直插式和贴片式两种。
LM358的特点:. 内部频率补偿. 低输入偏流. 低输入失调电压和失调电流. 共模输入电压范围宽，包括接地. 差模输入电压范围宽，等于电源电压范围. 直流电压增益高(约100dB). 单位增益频带宽(约1MHz). 电源电压范围宽：单电源(3—30V)；. 双电源(±1.5 一±15V). 低功耗电流，适合于电池供电. 输出电压摆幅大(0 至Vcc-1.5V)LM358稳压电路制作电路原理：本稳压器的核心器件采用LM358。
电路原理如下图所示。
它主要由供电、基准电压、电压取样比较等组成。
市电从变压器的1、2头输入，3、4头为自耦调压抽头，5、6头为控制电路的电源及取样抽头。
市电电压正常时，因C点电压始终为3V（即R1降压DW稳压所得），A、B点均大于3V，故A1、A2（lm358芯片）输出低电平；当市电电压下降时，5、6头的电压也随之下降，A点电压也跟着下降，当A点电压下降到低于3V时，A1输出高电平，使三极管V1饱和导通，继电器K1吸合，将调压器输出调于1、3头；当市电电压继续下降时，同理B点电压低于3V时，（VA 反之，如果电压升高时，B点电压也随之升高，当B点电压高于3V时，A2输出低电平，V2截止，H2释放，输出端调至1、3头；当市电电压继续升高时，A点电压高于3V，A1输出低电平，V1截止，K1释放，输出端调至1、2头。
A1、A2为运放，在这里作电压比较器用；IC1为三端稳压块，它为运放及继电器提供供电电源；VD5、VD6为保护二极管。
W78E58中文
W78E58B规格书8位微控制器目录:1.概述 (3)2.特性 (3)3.管脚配置 (4)4.管脚描述 (5)5.方块图 (7)6.功能描述 (8)6.1 RAM (8)6.2 定时器0，1，2 (8)6.3 时钟 (9)6.4 晶体振荡器 (9)6.5 外部时钟 (9)6.6 电源管理 (9)6.7 减少EMI辐射 (9)6.8 复位 (9)6.9 I/O口4 (11)6.10 INT2/INT3 (12)6.11 P4口基地址寄存器 (14)6.12 在线编程（ISP）模式 (15)6.13 在线编程控制寄存器（CHPCON） (17)6.14 F04KBOOT 模式（从LDROM启动） (18)7.保密位 (22)7.1 锁止位 (22)禁止 (22)7.2 MOVC7.3 加密 (22)8.电气特性 (23)8.1 绝对最大额定值 (23)8.2 DC特性 (23)出版日期: December 22, 20048.3 AC特性 (25)8.3.1时钟输入波形 (25)8.3.2程序读取周期 (26)8.3.3数据读取周期 (26)8.3.4数据写周期 (27)8.3.5端口访问周期 (27)9.时序波形图 (28)9.1 程序读取周期 (28)9.2 数据读周期 (28)9.3 数据写周期 (29)9.4 端口访问周期 (29)10.典型应用电路 (30)10.1 扩展的外部程序存储器和石英晶体 (30)10.2 扩展的外部程序存储器和振荡器 (31)11.封装尺寸 (32)11.1 DIP40 (32)11.2 44 管脚PLCC (33)11.3 44 管脚PQFP (34)12.应用指南 (35)12.1 ISP 软件编程示例： (35)13.文件版本描述 (42)1. 概述W78E58B是具有带ISP功能的Flash EPROM的低功耗8位微控制器；ISP功能的Flash EPROM可用于固件升级。
MAX038中文资料
高频函数信号发生器MAX038及其应用高频函数信号发生器MAX038及其应用作者：李琳来源：网络目前广泛应用的函数发生器芯片是ICL8038(国产5G8038)，他的主要技术指标是最高振荡频率仅为100 kHz，而且三种输出波形从不同的引脚输出，使用很不方便。
MAX038是ICL8038的升级产品，他的最高振荡频率可达40 MHz，而且由于在芯片内采用了多路选择器，使得三种输出波形可通过编程从同一个引脚输出，输出波形的切换时间可在0.3μs内完成，使用更加方便。
1 MAX038芯片介绍MAX038是MAXIM公司生产的一个只需要很少外部元件的精密高频波形产生器，在适当调整其外部控制条件时，它可以产生准确的高频方波、正弦波、三角波、锯齿波等信号，这些信号的峰峰值精确地固定在2V，频率从0.1Hz~20MHz连续可调，方波的占空比从10%~90%连续可调。
通过MAX038的A0、A1引脚上电平的不同组合，可以选择不同的输出波形类型。
其性能特点如下：(1) 0.1 Hz～20 MHz工作频率范围；(2) 15％～85％可变的占空比；(3) 低阻抗输出缓冲器：0.1；(4) 低失真正弦波：0.75％；(5) 低温度漂移：200 ppm／℃。
MAX038引脚排列如图所示各引脚功能如图所示：Max038内部电路，如图：2 MAX038芯片使用方法2.1 波形选择MAX038可以产生正弦波、方波或三角波。
具体的输出波形由地址A0和A1的输入数据进行设置，如表1所示。
波形切换可通过程序控制在任意时刻进行，而不必考虑输出信号当时的相位。
2.2 波形调整2.2.1 输出频率的调整输出频率调整方式分为粗调和细调两种方法：粗调取决于IIN引脚的输入电流IIN，COSC引脚的电容量CF(对地)以及FADJ引脚上的电压。
当VFADJ=0 V时，输出的中心频率f0为：fo(MHz)=Iin(μA)÷COSC (pF)。
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）。
LM358各种应用电路
LM358中文资料芯片资料 2012-11-16 11：11 阅读888图1 DIP塑封引脚图引脚功能图2 圆形金属壳封装管脚图图3 内部电路原理图lm358中文资料LM358内部包括有两个独立的、高增益、内部频率补偿的双运算放大器，适合于电源电压范围很宽的单电源使用，也适用于双电源工作模式，在推荐的工作条件下，电源电流与电源电压无关。
它的使用范围包括传感放大器、直流增益模组,音频放大器、工业控制、DC增益部件和其他所有可用单电源供电的使用运算放大器的场合。
LM358的封装形式有塑封8引线双列直插式和贴片式。
特性(Features)：＊内部频率补偿。
＊直流电压增益高(约100dB) 。
＊单位增益频带宽(约1MHz) 。
＊电源电压范围宽：单电源(3—30V)；双电源(±1.5一±15V) 。
＊低功耗电流，适合于电池供电。
＊低输入偏流。
＊低输入失调电压和失调电流。
＊共模输入电压范围宽，包括接地。
＊差模输入电压范围宽，等于电源电压范围。
＊输出电压摆幅大（0至Vcc-1.5V) 。
参数输入偏置电流45 nA输入失调电流50 nA输入失调电压2.9mV输入共模电压最大值VCC~1.5 V共模抑制比80dB电源抑制比100dBLM358应用电路图：图4 直流耦合低通RC有源滤波器图5 LED驱动器图6 TTL驱动电路图7 RC有源带通滤波器图8 Squarewave振荡器图9 滞后比较器图10 带通有源滤波器图11 灯驱动程序图12 电流监视器图13 低漂移峰值检测器图14 电压跟随器图15 功率放大器外围电路图16 电压控制振荡器VCO图17 固定电流源图18 脉冲发生器图19 交流耦合反相放大器图20 交流耦合非反相放大器图21 可调增益仪表放大器图22 直流放大器图23脉冲发生器图24 桥式电流放大器图25 引用差分输入信号图26 直流差动放大器。
max3485中文资料
max3485eesa + T概述Max3485eesa + T是3.3V电源±15kV ESD保护，真正的RS485 / RS422收发器，采用8引脚nsoic封装。
该低功耗收发器包含一个驱动器和一个接收器。
max3485e传输速率高达15Mbps。
它具有增强的静电保护。
所有发送器输出和接收器输入均具有±15kV保护，并通过IEC 1000-4-2气隙放电；±8Kv保护是通过IEC 1000-4-2接触放电，±15kV保护是通过人体模型。
驱动器受到短路电流的限制，并通过将驱动器输出置于高阻抗状态的热关断电路来防止过多的功耗。
接收器输入具有故障安全功能，如果两个输入均打开，则提供逻辑高电平输出。
Max3485e适用于EMI敏感应用，集成服务，数字网络和数据包交换电源电压范围：3V至3.6V工作温度范围-40°C至85°C半双工通讯该操作由单个+ 3.3V电源供电，无电荷泵兼容+ 5V逻辑2Na小电流关闭模式共模输入电压范围：-7V至+ 12V工业标准75176引脚输出驱动器/接收器启用功能工业控制LAN，ISDN，低功耗RS-485 / RS-422收发器;分组交换;电信;用于EMI敏感应用的收发器Max3483，max3485，max3486，max3488，max3490和max3491是用于RS-485和RS-422通信的3.3V低功耗收发器，每个收发器都有一个驱动器和一个接收器。
Max3483和max3488具有有限速率驱动器，可以降低EMI并减少由于端子匹配电缆不合适而引起的反射，从而实现高达250kbps的无错误数据传输。
由于其有限的摆幅速率，Max3486可以实现最大2.5mbps 的传输速率。
Max3485，max3490和max3491可以实现高达10Mbps的传输速率。
驱动器具有短路电流限制，并且可以通过热关断电路将驱动器的输出设置为高阻状态，以防止过多的功率损耗。
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lm358-pdf应用电路资料及引脚图
LM358是常用的双运放,这里我们介绍一下他的一些资料以及简单电路应用等,有什么问题请去电子论坛.简介:LM358里面包括有两个高增益、独立的、内部频率补偿的双运放，适用于电压范围很宽的单电源，而且也适用于双电源工作方式，它的应用范围包括传感放大器、直流增益模块和其他所有可用单电源供电的使用运放的地方使用。
〈lm358引脚图及引脚功能〉LM358封装有塑封8引线双列直插式和贴片式两种。
LM358的特点:. 内部频率补偿. 低输入偏流. 低输入失调电压和失调电流. 共模输入电压范围宽，包括接地. 差模输入电压范围宽，等于电源电压范围. 直流电压增益高(约100dB). 单位增益频带宽(约1MHz). 电源电压范围宽：单电源(3—30V)；. 双电源(±1.5 一±15V). 低功耗电流，适合于电池供电. 输出电压摆幅大(0 至Vcc-1.5V)lm358 pdf资料：下载LM358 pdf资料下载LM358中文资料lm358稳压电路制作电路原理：本稳压器的核心器件采用LM358。
电路原理如下图所示。
它主要由供电、基准电压、电压取样比较等组成。
<lm358稳压电路应用>市电从变压器的1、2头输入，3、4头为自耦调压抽头，5、6头为控制电路的电源及取样抽头。
市电电压正常时，因C点电压始终为3V（即R1降压DW稳压所得），A、B点均大于3V，故A1、A2（lm358芯片）输出低电平；当市电电压下降时，5、6头的电压也随之下降，A点电压也跟着下降，当A点电压下降到低于3V时，A1输出高电平，使三极管V1饱和导通，继电器K1吸合，将调压器输出调于1、3头；当市电电压继续下降时，同理B点电压低于3V时，（VA 反之，如果电压升高时，B点电压也随之升高，当B点电压高于3 V时，A2输出低电平，V2截止，H2释放，输出端调至1、3头；当市电电压继续升高时，A 点电压高于3V，A1输出低电平，V1截止，K1释放，输出端调至1、2头。