MAX6387XS41D4-T中文资料
MAX6348XR中文资料
For free samples & the latest literature: , or phone 1-800-998-8800.For small orders, phone 1-800-835-8769.General DescriptionThe MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348 microprocessor (µP) supervisory circuits moni-tor the power supplies in µP and digital systems. These devices provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with 2.5V, 3V, 3.3V, and 5V powered circuits.These circuits perform a single function: they assert a reset signal whenever the V CC supply voltage declines below a preset threshold, keeping it asserted for at least 100ms after V CC has risen above the reset threshold.The only difference between the devices is their output.The MAX6326/MAX6346 (push-pull) and MAX6328/MAX6348 (open-drain) have an active-low reset output.The MAX6327/MAX6347 have an active-high push-pull reset output. All of these parts are guaranteed to be in the correct state for V CC down to 1V. The reset compara-tor is designed to ignore fast transients on V CC . Reset thresholds are factory-trimmable between 2.2V and 4.63V, in approximately 100mV increments. Twenty-one standard versions are available. Contact the factory for availability of nonstandard versions.Ultra-low supply currents (1µA max for the MAX6326/MAX6327/MAX6328) make these parts ideal for use in portable equipment. All six devices are available in space-saving SOT23 and SC70 packages.ApplicationsComputers Intelligent Instruments Controllers AutomotiveCritical µP and µC Portable/Battery-Powered Power MonitoringEquipmentFeatureso Ultra-Low 1µA (max) Supply Current (MAX6326/MAX6327/MAX6328)o Precision Monitoring of 2.5V, 3V, 3.3V, and 5V Power-Supply Voltageso Reset Thresholds Available from 2.2V to 4.63V o Fully Specified Over Temperatureo 100ms (min) Power-On Reset Pulse Width o Low Costo Available in Three Versions: Push-Pull RESET ,Push-Pull RESET, and Open-Drain RESET o Power-Supply Transient Immunity o No External Componentso 3-Pin SC70/SOT23 Packageso Pin Compatible with MAX803/MAX809/MAX810MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX63483-Pin, Ultra-Low-Power SC70/SOTµP Reset Circuits________________________________________________________________Maxim Integrated Products 1Pin Configuration19-1294; Rev 3; 1/00†The MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348 are available in factory-set V CC reset thresholds from 2.2V to 4.63V, in approximately 0.1V increments. Choose the desired reset-threshold suffix from Table 1 and insert it in the blank spaces following “R.”There are 21 standard versions witha required order increment of 2500 pieces. Sample stock is gen-erally held on the standard versions only (see the SelectorGuide). Required order increment is 10,000 pieces for nonstan-dard versions (Table 2). Contact factory for availability. All devices available in tape-and-reel only.Selector Guide appears at end of data sheet.M A X 6326/M A X 6327/M A X 6328/M A X 6346/M A X 6347/M A X 63483-Pin, Ultra-Low-Power SC70/SOT µP Reset Circuits 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V CC = full range, T A = -40°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C and V CC = 3V.) (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.Terminal Voltage (with respect to GND)V CC ...........................................................................-0.3V to +6V RESET, RESET (push-pull).........................-0.3V to (V CC + 0.3V)RESET (open drain)..................................................-0.3V to +6V Input Current (V CC ).............................................................20mA Output Current (RESET, RESET ).........................................20mA Rate of Rise (V CC )...........................................................100V/µsContinuous Power Dissipation (T A = +70°C)3-Pin SC70 (derate 2.7mW/°C above +70°C)...............174mW 3-Pin SOT23 (derate 4mW/°C above +70°C)................320mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°CNote 1:Overtemperature limits are guaranteed by design and not production tested.MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX63483-Pin, Ultra-Low-Power SC70/SOTµP Reset Circuits_______________________________________________________________________________________3__________________________________________Typical Operating Characteristics(T A = +25°C, unless otherwise noted.)00.30.20.10.40.50.60.70.80.91.0-400-2020406080SUPPLY CURRENT vs. TEMPERATURE TEMPERATURE (°C)S U P P L Y C U R R E N T(µA)050100150200-400-2020406080POWER-DOWN RESET DELAY vs. TEMPERATURE TEMPERATURE (°C)R E S E T D E L A Y(µs)130150140160170180190200210-400-2020406080POWER-UP RESET TIMEOUT vs. TEMPERATURE M A X6326-03TEMPERATURE (°C)P O W E R-U P R E S E T T I M E O U T(m s)500011001000MAXIMUM TRANSIENT DURATION vs. RESET THRESHOLD OVERDRIVE (SC70)100300400200M A X6326-04RESET THRESHOLD OVERDRIVE,V TH - V CC (mV)M A X I M U M T R A N S I E N T D U R A T I O N(µs)10______________________________________________________________Pin DescriptionM A X 6326/M A X 6327/M A X 6328/M A X 6346/M A X 6347/M A X 63483-Pin, Ultra-Low-Power SC70/SOT µP Reset Circuits 4___________________________________________________________________________________________________Applications InformationInterfacing to µPs with Bidirectional Reset PinsSince the RESET output on the MAX6328/MAX6348 is open drain, these devices interface easily with micro-processors (µPs) that have bidirectional reset pins,such as the Motorola 68HC11. Connecting the µP supervisor’s RESET output directly to the microcon-troller’s (µC’s) RESET pin with a single pull-up resistor allows either device to assert reset (Figure 1).Negative-Going V CC TransientsIn addition to issuing a reset to the µP during power-up,power-down, and brownout conditions, these devices are relatively immune to short-duration, negative-going V CC transients (glitches).The Typical Operating Characteristics show the Maxi-mum Transient Duration vs. Reset Threshold Overdrive graph, for which reset pulses are not generated. The graph shows the maximum pulse width that a negative-going V CC transient may typically have when issuing a reset signal. As the amplitude of the transient increas-es, the maximum allowable pulse width decreases.Figure 1. Interfacing to µPs with Bidirectional Reset PinsTable 1. Factory-Trimmed Reset Thresholds ‡‡Factory-trimmed reset thresholds are available in approximately 100mV increments with a 1.5% room-temperature variance.MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX63483-Pin, Ultra-Low-Power SC70/SOTµP Reset Circuits_______________________________________________________________________________________5Table 1. Factory-Trimmed Reset Thresholds‡(continued)‡Factory-trimmed reset thresholds are available in approximately 100mV increments with a 1.5% room-temperature variance.Table 2. Device Marking Codes and Minimum Order IncrementsM A X 6326/M A X 6327/M A X 6328/M A X 6346/M A X 6347/M A X 63483-Pin, Ultra-Low-Power SC70/SOT µP Reset Circuits 6__________________________________________________________________________________________________________Chip InformationTRANSISTOR COUNT: 419Table 2. Device Marking Codes and Minimum Order Increments (continued)Selector Guide(standard versions*)*Sample stock is generally held on all standard versions.________________________________________________________Package InformationMAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX63483-Pin, Ultra-Low-Power SC70/SOTµP Reset Circuits_______________________________________________________________________________________7M A X 6326/M A X 6327/M A X 6328/M A X 6346/M A X 6347/M A X 63483-Pin, Ultra-Low-Power SC70/SOT µP Reset Circuits Maxim 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.Package Information (continued)。
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 .)。
MAX4173TEUT-T中文资料
Notebook Computers
Portable/Battery-Powered Systems
Smart Battery Packs/Chargers
Cell Phones
Power-Management Systems
General System/Board-Level Current Monitoring
The combination of three gain versions and a userselectable external sense resistor sets the full-scale current reading. This feature offers a high level of integration, resulting in a simple and compact currentsense solution.
+20V/V (MAX4173T) +50V/V (MAX4173F) +100V/V (MAX4173H) ♦ ±0.5% Full-Scale Accuracy ♦ ±0.3mV Input Offset Voltage (MAX4173T) ♦ 420µA Supply Current ♦ Wide 1.7MHz Bandwidth (MAX4173T) ♦ +3V to +28V Operating Supply ♦ Available in Space-Saving SOT23-6 Package
Typical Operating Circuit
0 TO +28V
VSENSE
+3V TO +28V 0.1µF
MAX2870中文规格书
PARAMETER
CONDITIONS
REFERENCE OSCILLATOR INPUT (REF_IN)
REF_IN Input Frequency Range
REF_IN Input Sensitivity
REF_IN Input Capacitance
REF_IN Input Current
CONDITIONS
CP[3:0] = 1111, RSET = 5.1kI CP[3:0] = 0000, RSET = 5.1kI
With output dividers (1/2/4/8/16/32/64/128)
Open loop Open loop into 2:1 VSWR Fundamental VCO output Fundamental VCO output VCO output divided-by-2 VCO output divided-by-2
定购信息在数据资料的最后给出。 典型应用电路在数据手资料的最后给出。
相关型号以及配合该器件使用的推荐产品，请参见：china.maximintegrated. com/MAX2870.related。
功能框图
MAX2870
REF_IN
CLK DATA
LE
MUX
R COUNTER
X2
SPI AND REGISTERS
Both channels enabled, maximum output power
Total, including RFOUT, both channel (Note 3)
Each output divide-by-2 ICCVCO + ICCRF (Note 3) Low-power sleep mode
MAX1722EZK-T中文资料
MAX1722
FB 3
4
OUT
THIN SOT23-5
Pin Configurations are continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
元器件交易网
19-1735; Rev 0; 7/01
1.5µA IQ, Step-Up DC-DC Converters in Thin SOT23-5
General Description
The MAX1722/MAX1723/MAX1724 compact, high-efficiency, step-up DC-DC converters are available in tiny, 5pin thin SOT23 packages. They feature an extremely low 1.5µA quiescent supply current to ensure the highest possible light-load efficiency. Optimized for operation from one to two alkaline or nickel-metal-hydride (NiMH) cells, or a single Li+ cell, these devices are ideal for applications where extremely low quiescent current and ultra-small size are critical. Built-in synchronous rectification significantly improves efficiency and reduces size and cost by eliminating the need for an external Schottky diode. All three devices feature a 0.5Ω N-channel power switch. The MAX1722/ MAX1724 also feature proprietary noise-reduction circuitry, which suppresses electromagnetic interference (EMI) caused by the inductor in many step-up applications. The family offers different combinations of fixed or adjustable outputs, shutdown, and EMI reduction (see Selector Guide). o o o o o o o o o o o
Analog Devices ADM6384YKS29D3Z-R7 微处理器监测电路说明书
ADM6384YKS29D3Z-R7ADM6384YKS23D3Z-R7Microprocessor SupervisoryRev. CInformation furnished by Analog Devices is believed to be accurate and reliable. However, noresponsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. T rademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, M A 02062-9106, U.S.A. Tel: 781.329.4700 Fax: 781.461.3113 ©2005–2011 Analog Devices, Inc. All rights reserved.FEATURESPrecision power supply monitoring31 reset threshold options: 1.58 V to 5.0 VFour reset timeouts: 1 ms, 20 ms, 140 ms, and 1120 ms Manual reset inputReset output stagePush-pull active-lowGuaranteed reset output valid to V CC = 1 VPower supply glitch immunitySpecified over the −40°C to +125°C temperature range4-lead SC70 packageAPPLICATIONSMicroprocessor systemsComputersControllersIntelligent instrumentsPortable equipmentGENERAL DESCRIPTIONThe ADM6384 is a supervisory circuit that monitors power supply voltage levels in microprocessor-based systems. A power-on reset signal is generated when the supply voltage rises to a preset threshold level. The debounced manual reset input of the ADM6384 can be used to initiate a reset by means of an external push button or logic signal.The part is available in a choice of 31 reset threshold options, from 1.58 V to 5.0 V. The minimum reset timeout periods are 1 ms, 20 ms, 140 ms, and 1120 ms.The ADM6384 is available in a 4-lead SC70 package and typi-cally consumes only 7 µA, making it suitable for use in low power, portable applications. FUNCTIONAL BLOCK DIAGRAMSFigure 1.535-2Figure 2.ADM6384Rev. C | Page 2 of 12TABLE OF CONTENTSFeatures .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagrams ............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 5 ESD Caution .................................................................................. 5 Pin Configuration and Function Descriptions ............................. 6 Typical Performance Characteristics ..............................................7 Circuit Description............................................................................9 Reset Output ..................................................................................9 Manual Reset Input .......................................................................9 Applications Information .............................................................. 10 Negative-Going V CC Transients ................................................ 10 Ensuring Reset Valid to V CC = 0 V ........................................... 10 Outline Dimensions ....................................................................... 11 Ordering Guide .. (11)REVISION HISTORY4/11—Rev. B to Rev. CUpdated Outline Dimensions ....................................................... 11 Changes to Ordering Guide . (11)7/08—Rev. A to Rev. BChanges to Figure 5, Figure 8, and Figure 9.................................. 7 Changes to Figure 10 ........................................................................ 8 Changes to Figure 15 ...................................................................... 11 Changes to Ordering Guide . (11)1/07—Rev. 0 to Rev. AUpdated Format .................................................................. U niversal Changes to Specifications Table ...................................................... 3 Updated Outline Dimensions ....................................................... 11 Changes to Ordering Guide . (11)7/05—Revision 0: Initial VersionSPECIFICATIONSV CC = full operating range, T A = −40°C to +125°C, unless otherwise noted.Rev. C | Page 3 of 121 T A = 25°C only.Rev. C | Page 4 of 12Rev. C | Page 5 of 12ABSOLUTE MAXIMUM RATINGST A = 25°C, unless otherwise noted.Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operationalsection of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Rev. C | Page 6 of 12PIN CONFIGURATION AND FUNCTION DESCRIPTIONSGNDRESET 05305-003Figure 3. Pin ConfigurationRev. C | Page 7 of 12TYPICAL PERFORMANCE CHARACTERISTICS05305-004TEMPERATURE (°C)120–40–2020406080100I C C (µA )10.09.57.57.06.59.08.58.06.05.55.04.54.03.5 Figure4. Supply Current vs. Temperature05305-005TEMPERATURE (°C)120–40–2040201008060N O R M A L I Z E D R E S E T T I M E O U T (m s )1.201.151.101.050.951.000.900.850.80Figure 5. Normalized Reset Timeout Period vs. Temperature05305-006TEMPERATURE (°C)120–40–2040201008060V C C T O R E S E T O U T P U T D E L A Y (µs )100908060704050201030Figure 6. V CC to Reset Output Delay vs. Temperature05305-007TEMPERATURE (°C)120–40–2040201008060N O R M A L I Z E D R E S E T T H R E S H O L D (V )1.051.031.041.011.020.991.000.970.980.950.96Figure 7. Normalized Reset Threshold vs. Temperature05305-008I SINK (mA)70123456V OL (V )0.200.150.100.05Figure 8. Output Voltage Low vs. I SINK05305-009I SOURCE (mA)1.000.20.40.60.8V O H (V )2.922.902.882.862.842.82Figure 9. Output Voltage High vs. I SOURCERev. C | Page 8 of 1205305-010OVERDRIVE V OD (mV)100010100M A X I M U M V C C T R A N S I E N T D U R A T I O N (µs )160120140100608040200Figure 10. Maximum V CC Transient Duration vs. Reset Threshold Overdrive05305-011TEMPERATURE (°C)–40–2020406080100120M A N U A L R E S E T T O R E S E T D E L A Y (n s )340280320300260220240200180160140120100Figure 11. Manual Reset Minimum Pulse Width vs. TemperatureRev. C | Page 9 of 12CIRCUIT DESCRIPTIONThe ADM6384 provides microprocessor supply voltage supervi-sion by controlling the microprocessor reset input. Code execution errors are avoided during power-up, power-down, and brownout conditions by asserting a reset signal when the supply voltage is below a preset threshold. In addition, the ADM6384 allows supply voltage stabilization with a fixed timeout before the reset deasserts after the supply voltage rises above the threshold. If the user detects a problem with the system operation, a manual reset input is available to reset the microprocessor by means of an external push-button, for example.RESET OUTPUTThe ADM6384 features an active-low, push-pull reset output. The reset signal is guaranteed to be logic low for V CC down to 1 V . The reset output is asserted when V CC is below the reset threshold (V TH ) or when MR is driven low. Reset remains asserted for the duration of the reset active timeout period (t RP ) after V CC rises above the reset threshold or after MR transitions from low to high. Figure 12 illustrates the behavior of the reset outputs. VV V CC RESET05305-012Figure 12. Reset Timing DiagramMANUAL RESET INPUTThe ADM6384 features a manual reset input (MR ) that, when driven low, asserts the reset output. When MR transitions from low to high, reset remains asserted for the duration of the reset active timeout period before deasserting. The MR input has a 52 kΩ internal pull-up so that the input is always high when unconnected. An external push-button switch can be connected between MR and ground so that the user can generate a reset. Debounce circuitry for this purpose is integrated on-chip. Noise immunity is provided on the MR input, and fast, negative-going transients of up to 100 ns (typical) are ignored. A 0.1 µF capacitor between MR and ground provides additional noise immunity.Rev. C | Page 10 of 12APPLICATIONS INFORMATIONNEGATIVE-GOING V CC TRANSIENTSTo avoid unnecessary resets caused by fast power supply tran-sients, the ADM6384 is equipped with glitch rejection circuitry. The typical performance characteristic shown in Figure 10 plots V CC transient duration vs. the transient magnitude. The curves show combinations of transient magnitude and duration for which a reset is not generated for 4.63 V and 2.93 V reset threshold parts. For example, with the 2.93 V threshold, a transient that goes 100 mV below the threshold and lasts 8 µs typically does not cause a reset, but if the transient is any greater in magnitude or duration, a reset is generated. An optional 0.1 µF bypass capacitor mounted close to V CC provides additional glitch rejection.ENSURING RESET VALID TO V CC = 0 VBoth active-low and active-high reset outputs are guaranteed to be valid for V CC as low as 1 V . However, by using an external resistor with push-pull configured reset outputs, valid outputs for V CC as low as 0 V are possible. For an active-low reset out-put, a resistor connected between RESET and ground pulls the output low when it is unable to sink current. A large resistance such as 100 kΩ should be used to avoid overloading the reset output when V CC is above 1 V .Figure 13. Ensuring Reset Valid to V CC = 0 VADM6384Rev. C | Page 11 of 12OUTLINE DIMENSIONS*PACKAGE OUTLINE CORRESPONDS IN FULL TO EIAJ SC82EXCEPT FOR WIDTH OF PIN 2AS SHOWN.072809-A0.100.10Figure 14. 4-Lead Thin Shrink Small Outline Transistor Package [SC70](KS-4)Dimensions shown in millimeters1: 1ms (MIN)2: 20ms (MIN)3: 140ms (MIN)4:1120ms (MIN)Y: –40°C (16TO 50)05305-014Figure 15. Ordering Code StructureORDERING GUIDEStandard Models 1, 2ResetThreshold (V) ResetTimeout (ms) Temperature RangeQuantity Package Description PackageOption BrandingADM6384YKS23D3Z-R7 2.31 140 −40°C to +125°C 3k 4-Lead SC70 KS-4 N0R ADM6384YKS26D3Z-R7 2.63 140 −40°C to +125°C 3k 4-Le a d SC70 KS-4 N0R ADM6384YKS29D1Z-R7 2.93 1 −40°C to +125°C 3k 4-Lead SC70 KS-4 N0R ADM6384YKS29D3Z-R7 2.93 140 −40°C to +125°C 3k 4-Lead SC70 KS-4 N0R ADM6384YKS31D1Z-R7 3.08 1 −40°C to +125°C 3k 4-Lead SC70 KS-4 N0R ADM6384YKS31D2Z-R7 3.08 20 −40°C to +125°C 3k 4-Le a d SC70 KS-4 N0R ADM6384YKS34D2Z-R7 3.4 20 −40°C to +125°C 3k 4-Le a d SC70 KS-4 N0R ADM6384YKS39D2Z-R7 3.9 20 −40°C to +125°C 3k 4-Le a d SC70 KS-4 N0R ADM6384YKS45D3Z-R7 4.5 140 −40°C to +125°C 3k 4-Le a d SC70 KS-4 N0R ADM6384YKS46D2Z-R74.63 20 −40°C to +125°C 3k 4-Le a d SC70 KS-4 N0R1If ordering nonstandard models, complete the ordering code shown in Figure 15 by inserting reset timeout and reset threshold suffixes. Contact sales for availability of nonstandard models. 2Z = RoHS Compliant Part.ADM6384Rev. C | Page 12 of 12NOTES©2005–2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners.D05305-0-4/11(C)ADM6384YKS29D3Z-R7ADM6384YKS23D3Z-R7。
MAXIM MAX5417 5418 5419 说明书
________________________________概述MAX5417/MAX5418/MAX5419是非易失、线性数字电位器，与机械电位器功能相似，但可通过简单的2线数字接口控制，允许多个器件进行通信。
每个器件具有分离电位器或可变电阻的功能，具有256个抽头点。
这些器件内置非易失EEPROM ，用于存储滑动端的位置，上电时进行初始化处理。
快速模式I 2C TM 兼容接口允许400kbps 的通信速率，在许多应用场合可有效减小电路板面积，简化电路连接。
每个器件有一个工厂预置地址，有四种地址选择(见选择指南)，配合地址选择输入，共提供八个唯一的地址组合。
MAX5417/MAX5418/MAX5419提供了三个标称阻值：50kΩ(MAX5417)、100kΩ(MAX5418)和200kΩ(MAX5419)。
标称电阻的端到端温度系数为35ppm/°C, 比率温度系数仅为5ppm/°C ，非常适合低温漂可变电阻的应用，如低漂移、可编程增益放大器。
MAX5417/MAX5418/MAX5419采用3mm x 3mm 、8引脚TDFN 封装，工作在-40°C 至+85°C 扩展级温度范围。
________________________________应用替代机械电位器低漂移可编程增益放大器音量控制液晶显示屏(LCD)对比度控制________________________________特性♦上电后从非易失存储器调用滑动端位置♦微型3mm x 3mm 、8引脚TDFN 封装♦端到端电阻温度系数：35ppm/°C ♦比率温度系数：5ppm/°C ♦阻值：50k Ω/100k Ω/200k Ω♦快速I 2C 兼容串行接口♦500nA (典型值)静态电流♦单电源+2.7V 至+5.25V 供电♦256抽头♦分压模式下DNL 为：±0.5 LSB ♦分压模式下INL 为：±0.5 LSBMAX5417/MAX5418/MAX5419256抽头、非易失、I 2C 接口数字电位器________________________________________________________________Maxim Integrated Products1功能图19-3185; Rev 2; 8/04本文是Maxim 正式英文资料的译文，Maxim 不对翻译中存在的差异或由此产生的错误负责。
max24033emy+t的规格书
max24033emy+t的规格书规格书：max24033emy+t一、产品介绍：max24033emy+t是一款高度集成的4通道电源管理IC，它主要用于工业控制系统、通信设备和数据中心等领域的电源管理。
该产品采用优质的半导体材料和先进的封装工艺，具有稳定可靠的性能和高效省电的特点。
二、产品特点：1.高度集成：max24033emy+t集成了4个高性能电源管理通道，包括电池充电管理、DC-DC转换器和电源监控等功能，可满足多种应用的需求。
2.宽输入电压范围：max24033emy+t支持广泛的输入电压范围，从3.5V到28V，能适应不同电源供应的要求。
3.高效节能：max24033emy+t采用了先进的能量管理技术，具有高效节能的特点，可以最大程度地减少能源浪费。
4.低功耗待机模式：max24033emy+t在待机模式下，功耗极低，能有效延长电池使用寿命。
5.温度保护：max24033emy+t具有自动温度保护功能，可在过热时自动停止工作，保护电路不受损坏。
6.电池管理：max24033emy+t支持电池充电和放电管理，能确保电池使用的安全和稳定性。
三、应用领域：max24033emy+t广泛应用于各种工业控制系统、通信设备和数据中心等领域，如智能家居、自动化控制、无线通信设备、数据存储等。
四、主要性能参数：1.输入电压范围：3.5V-28V2.输出电压范围：1.5V-16V3.输出电流范围：0A-3A4.工作温度范围：-40℃~85℃5.封装形式：QFN封装五、产品优势：1.优质材料：max24033emy+t采用优质的半导体材料和先进的封装工艺，保证了产品的稳定性和可靠性。
2.高效节能：max24033emy+t采用了先进的能量管理技术，具有高效节能的特点，能最大程度地减少能源浪费。
3.宽电压范围：max24033emy+t支持广泛的输入电压范围，能适应不同电源供应的要求。
4.多通道设计：max24033emy+t具有4个独立的电源管理通道，可满足多种应用的需求。
MAX834中文资料
_______________General DescriptionThe MAX834/MAX835 micropower voltage monitors contain a 1.204V precision bandgap reference, com-parator, and latched output in a 5-pin SOT23 ing the latched output prevents deep discharge of batteries. The MAX834 has an open-drain, N-channel output driver, while the MAX835 has a push/pull output driver. Two external resistors set the trip-threshold voltage.The MAX834/MAX835 feature a level-sensitive latch,eliminating the need to add hysteresis to prevent oscil-lations in battery-load-disconnect applications.________________________ApplicationsPrecision Battery Monitor Load SwitchingBattery-Powered Systems Threshold Detectors____________________________Featureso Prevents Deep Discharge of Batteries o Precision ±1.25% Voltage Threshold o Latched Output (once low, stays low until cleared)o SOT23-5 Package o Low Costo Wide Operating Voltage Range, +2.5V to +11V o <2µA Typical Supply Current o Open-Drain Output (MAX834)Push/Pull Output (MAX835)MAX834/MAX835Micropower, Latching Voltage Monitorsin SOT23-5________________________________________________________________Maxim Integrated Products 1__________________Pin Configuration__________Typical Operating Circuit19-1157; Rev 0; 12/96______________Ordering InformationFor free samples & the latest literature: , or phone 1-800-998-8800M A X 834/M A X 835Micropower, Latching Voltage Monitors in SOT23-52_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V CC = +2.5V to +11V, 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.V CC , OUT (MAX834), CLEAR to GND......................-0.3V to 12V IN, OUT (MAX835), to GND........................-0.3V to (V CC +0.3V)INPUT CurrentV CC .................................................................................20mA IN.....................................................................................10mA OUT Current.......................................................................-20mAV CC Rate of Rise .............................................................100V/µs Continuous Power DissipationSOT23-5 (derate 7.1mW/°C above +70°C)..................571mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10sec).............................+300°CMAX834/MAX835Micropower, Latching Voltage Monitorsin SOT23-5_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS (continued)(V CC = +2.5V to +11V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)Note 1:The voltage-detector output remains in the correct state for V CC down to 1.2V when V IN ≤V CC / 2.Note 2:Supply current has a monotonic dependence on V CC (see Typical Operating Characteristics ).Note 3:IN leakage current has a monotonic dependence on V CC (see Typical Operating Characteristics ).Note 4:The MAX834 open-drain output can be pulled up to a voltage greater than V CC , but may not exceed 11V.__________________________________________Typical Operating Characteristics(V CC = +5V, Typical Operating Circuit, T A = +25°C, unless otherwise noted.)5.01.0-60-40020100INPUT LEAKAGE CURRENT vs. TEMPERATURE3.53.02.52.01.54.0TEMPERATURE (°C)I N P U T L E A K A G E C U R R E N T (n A )-204060804.590013489101112INPUT LEAKAGE CURRENT vs. INPUT VOLTAGE2010307080V IN (V)I N P U T L E A K A G E C U R R E N T (n A )2567405060 4.513489101112SUPPLY CURRENT vs. SUPPLY VOLTAGE1.51.00.52.04.0V CC (V)S U P P L Y C U R R E N T (µA )25672.53.03.562.4 2.83.2 3.6SUPPLY CURRENT vs. INPUT VOLTAGE5V IN (V)S U P P L Y C U R R E N T (µA )1.2210.40.8 2.041.6120013489101112SUPPLY CURRENT vs. INPUT VOLTAGE5432161011V IN (V)S U P P L Y C U R R E N T (µA )2567789 6.02.0-60-40020100PROGRAMMED TRIP VOLTAGEvs. TEMPERATURE3.22.82.43.65.25.6TEMPERATURE (°C)T R I P V O L T A G E (V )-204060804.04.44.8M A X 834/M A X 835Micropower, Latching Voltage Monitors in SOT23-54_______________________________________________________________________________________25013489101112MAX835OUTPUT SHORT-CIRCUITSOURCE CURRENT vs. SUPPLY VOLTAGE1510520V CC (V)S H O R T -C I R C U I T C U R R E N T (m A )256716040-60-40020100SUPPLY VOLTAGE FALLING TO OUT PROPAGATION DELAY vs. TEMPERATURE1301201101009080706050140TEMPERATURE (°C)P R O P A G A T I O N D E L A Y (µs )-204060801501000013489101112MAX835OUTPUT RISE TIME vs. SUPPLY VOLTAGE300200100400800900V CC (V)R I S E T I M E (n s )25675006007002.513489101112OUTPUT FALL TIME vs. SUPPLY VOLTAGE1.51.00.52.0V CC (V)F A L L T I M E (µs )25671101001k10k100k0.11100OUTPUT LOW VOLTAGE vs. OUTPUT SINK CURRENTOUTPUT SINK CURRENT (mA)V O L (m V )101101001k 10k 100k0.11100MAX835OUTPUT HIGH VOLTAGE vs. OUTPUT SOURCE CURRENTOUTPUT SOURCE CURRENT (mA)V C C - V O H (m V )1025013489101112OUTPUT LOW VOLTAGE vs. SUPPLY VOLTAGE15010050200V CC (V)V O L (m V )25675000134********MAX835OUTPUT HIGH VOLTAGE vs. SUPPLY VOLTAGE15010050200400450V CC (V)V C C - V O H (m V )25672503003502013489101112OUTPUT SHORT-CIRCUIT10515V CC (V)S H O R T -C I R C U I T C U R R E N T (m A )2567_____________________________Typical Operating Characteristics (continued)(V CC = +5V, Typical Operating Circuit, T A = +25°C, unless otherwise noted.)MAX834/MAX835Micropower, Latching Voltage Monitorsin SOT23-5_______________________________________________________________________________________5_____________________________Typical Operating Characteristics (continued)(V CC = +5V, Typical Operating Circuit, T A = +25°C, unless otherwise noted.)1101001k 10k0.1100OUTPUT LOW VOLTAGE vs. OUTPUT SINK CURRENTOUTPUT SINK CURRENT (mA)V O L (m V )1101101001k 10k 0.110MAX835OUTPUT HIGH VOLTAGE vs. OUTPUT SOURCE CURRENTOUTPUT SOURCE CURRENT (mA)V C C - V O H (m V )11.50.1-60-40020100CLEAR TO OUT PROPAGATION DELAYvs. TEMPERATURE0.90.70.50.31.1TEMPERATURE (°C)P R O P A G A T I O N D E L A Y (µs )-204060801.3______________________________________________________________Pin DescriptionOpen-Drain (MAX834) or Push/Pull (MAX835) Latched Output. OUT is active low.OUT5Noninverting Input to the Comparator. The inverting input connects to the internal 1.204V bandgap reference.IN 4System Supply InputV CC 3PINSystem Ground GND 2Clear Input resets the latched output. With V IN > V TH , pulse CLEAR high for a minimum of 1µs to reset the output latch. Connect to V CC to make the latch transparent.CLEAR 1FUNCTIONNAME Figure 1. Functional Diagram Figure 2. Programming the Trip Voltage (V TRIP )M A X 834/M A X 835Micropower, Latching Voltage Monitors in SOT23-56______________________________________________________________________________________________________Detailed DescriptionThe MAX834/MAX835 micropower voltage monitors con-tain a 1.204V precision bandgap reference and a com-parator with an output latch (Figure 1). The difference between the two parts is the structure of the comparator output driver. The MAX834 has an open-drain, N-channel output driver that can be pulled up to a voltage higher than V CC , but less than 11V. The MAX835’s output is push/pull and can both source and sink current.Programming the Trip Voltage (V TRIP )Two external resistors set the trip voltage, V TRIP (Figure 2). V TRIP is the point at which the falling monitored volt-age (typically V CC ) causes OUT to go low. IN’s high input impedance allows the use of large-value resistors without compromising trip voltage accuracy. To minimize current consumption, choose a value for R2between 500k Ωand 1M Ω, then calculate R1 as follows:R1 = R2 [(V TRIP / V TH ) - 1]where V TRIP is the desired trip voltage and V TH is the threshold voltage (1.204V). The voltage at IN must be at least 1V less than V CC .Latched-Output OperationThe MAX834/MAX835 feature a level-sensitive latch input (CLEAR), designed to eliminate the need for hys-teresis in battery undervoltage-detection applications.When the monitored voltage (V MON ) is above the pro-grammed trip voltage (V TRIP ) (as when the system bat-tery is recharged or a fresh battery is installed), pulse CLEAR low-high-low for at least 1µs to reset the output latch (OUT goes high). When V MON falls below V TRIP ,OUT goes low and remains low (even if V MON rises above V TRIP ), until CLEAR is pulsed high again with V MON > V TRIP . Figure 3 shows the timing relationship between V MON , OUT , and CLEAR.> V TRIP< V TRIPV CC0VOUTV MONFigure 3a. Timing DiagramFigure 3b. Timing Diagram, CLEAR = V CCMAX834/MAX835Micropower, Latching Voltage Monitorsin SOT23-5_______________________________________________________________________________________7Monitoring Voltages Other than V CCThe typical operating circuit for the MAX834/MAX835monitors V CC . Voltages other than V CC can easily be monitored, as shown in Figure 4. Calculate V TRIP as in the section Programming the Trip Voltage. When monitoring voltages other than V CC , ensure that the maximum value for V MON is not exceeded:V MON(MAX)= (V CC - 1)(R1 + R2) / R2Load-Disconnect SwitchThe circuit in Figure 5 is designed to prevent a lead-acid battery or a secondary battery such as an NiCd,from sustaining damage through deep discharge. As the battery reaches critical undervoltage, OUT switches low. Q1 and Q2 turn off, disconnecting the battery from the load. The MAX835’s latched output prevents Q1 and Q2 from turning on again as the battery voltage relaxes to its open-circuit voltage when the load disconnects.CLEAR can be connected to a pushbutton switch, an RC network, or a logic gate to reset the latch when the battery is recharged or replaced.Figure 4. Monitoring Voltages Other than V CCFigure 5. Load-Disconnect SwitchTRANSISTOR COUNT: 74___________________Chip InformationM A X 834/M A X 835Micropower, Latching Voltage Monitors in SOT23-5Maxim 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.________________________________________________________________Package Information__________________________________________________Tape-and-Reel Information。
MAX3841中文资料
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Core Supply Current Data Rate
ICC
Excluding CML termination currents
(Note 1)
65
90
mA
0
12.5 Gbps
CML Input Differential CML Input Common Mode
Termination Currents)
Ordering Information
PART
TEMP RANGE
MAX3841ETG -40°C to +85°C
PINPACKAGE
24 Thin QFN
PKG. CODE
T2444-1
Pin Configuration appears at end of data sheet.
12
dB
CML Output Differential CML Output Termination
VOUT
(Note 2) Single ended
400
500
42.5
50
600 57.5
mVP-P Ω
CML Output Transition Time Deterministic Jitter Random Jitter Propagation Delay
Note 4: Measured at 9.953Gbps using a pattern of 100 ones, 27 - 1 PRBS, 100 zeros, 27 - 1 PRBS, and at 12.5Gbps using a ±K28.5 pattern. VCC_IN = VCC_OUT = 1.8V, and VIN = 400mVP-P differential.
MAX6342SUT-T中文资料
MAX6342–MAX6345
6-Pin µP Reset Circuit with Power-Fail Comparator
ABSOLUTE MAXIMUM RATINGS
VCC to GND ..............................................................-0.3V to +6V RESET, RESET
元器件交易网
19-1568; Rev 2; 12/05
MAX6342–MAX6345
6-Pin µP Reset Circuit with Power-Fail Comparator
General Description
The MAX6342–MAX6345 family of microprocessor (µP) supervisory circuits monitors power supplies in digital systems. These devices significantly improve system reliability and accuracy compared to separate ICs or discrete components.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at .
元器件交易网
Selector Guide 1
SUFFIX
L
M T S R Z
RESET THRESHOLD (V) 4.63 4.38 3.08 2.93 2.63 2.33
MAX6387XS29D4-T中文资料
General DescriptionThe MAX6381–MAX6390 microprocessor (µP) supervisory circuits monitor power supply voltages from +1.8V to +5.0V while consuming only 3µA of supply current at +1.8V. Whenever V CC falls below the factory-set reset thresholds, the reset output asserts and remains assert-ed for a minimum reset timeout period after V CC rises above the reset threshold. Reset thresholds are available from +1.58V to +4.63V, in approximately 100mV incre-ments. Seven minimum reset timeout delays ranging from 1ms to 1200ms are available.The MAX6381/MAX6384/MAX6387 have a push-pull active-low reset output. The MAX6382/MAX6385/MAX6388 have a push-pull active-high reset output,and the MAX6383/MAX6386/MAX6389/MAX6390 have an open-drain active-low reset output. The MAX6384/MAX6385/MAX6386 also feature a debounced manual reset input (with internal pullup resistor). The MAX6387/MAX6388/MAX6389 have an auxiliary input for monitoring a second voltage. The MAX6390 offers a manual reset input with a longer V CC reset timeout period (1120ms or 1200ms) and a shorter manual reset timeout (140ms or 150ms).The MAX6381/MAX6382/MAX6383 are available in 3-pin SC70 packages and the MAX6384–MAX6390 are avail-able in 4-pin SC70 packages.________________________ApplicationsComputers ControllersIntelligent InstrumentsCritical µP and µC Power Monitoring Portable/Battery-Powered Equipment Dual Voltage SystemsFeatureso Factory-Set Reset Threshold Voltages Ranging from +1.58V to +4.63V in Approximately 100mV Increments o ±2.5% Reset Threshold Accuracy Over Temperature (-40°C to +125°C)o Seven Reset Timeout Periods Available: 1ms,20ms, 140ms, 280ms, 560ms, 1120ms, 1200ms (min)o 3 Reset Output OptionsActive-Low Push-Pull Active-High Push-Pull Active-Low Open-Draino Reset Output State Guaranteed Valid Down to V CC = 1Vo Manual Reset Input (MAX6384/MAX6385/MAX6386)o Auxiliary RESET IN(MAX6387/MAX6388/MAX6389)o V CC Reset Timeout (1120ms or 1200ms)/Manual Reset Timeout (140ms or 150ms) (MAX6390)o Negative-Going V CC Transient Immunity o Low Power Consumption of 6µA at +3.6V and 3µA at +1.8V o Pin Compatible withMAX809/MAX810/MAX803/MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348, and MAX6711/MAX6712/MAX6713o Tiny 3-Pin SC70 and 4-Pin SC70 PackagesMAX6381–MAX6390SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits________________________________________________________________Maxim Integrated Products1Pin Configurations19-1839; Rev 1; 04/01Ordering InformationOrdering Information continued at end of data sheet.Typical Operating Circuit appears at end of data sheet.Selector Guide appears at end of data sheet.Note:Insert reset threshold suffix (see Reset Threshold table)after "XR" or "XS". Insert reset timeout delay (see Reset Timeout Delay table) after "D" to complete the part number. Sample stock is generally held on standard versions only (seeStandard Versions table). Standard versions have an order increment requirement of 2500 pieces. Nonstandard versions have an order increment requirement of 10,000 pieces.Contact factory for availability of nonstandard versions.*MAX6390 is available with D4 or D7 timing only.For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .M A X 6381–M A X 6390SC70, Single/Dual Low-Voltage, Low-Power µP Reset CircuitsABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICSStresses 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 +6.0V RESET Open-Drain Output....................................-0.3V to +6.0V RESET , RESET (Push-Pull Output).............-0.3V to (V CC + 0.3V)MR , RESET IN.............................................-0.3V to (V CC + 0.3V)Input Current (V CC ).............................................................20mA Output Current (All Pins).....................................................20mAContinuous Power Dissipation (T A = +70°C)3-Pin SC70 (derate 2.9mW/°C above +70°C)........235mW 4-Pin SC70 (derate 3.1mW/°C above +70°C)........245mW Operating Temperature Range .........................-40°C to +125°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°CMAX6381–MAX6390SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits_______________________________________________________________________________________3M A X 6381–M A X 6390SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits 4______________________________________________________________________________________Typical Operating Characteristics(T A = +25°C, unless otherwise noted.)215436789-40-105-25203550658095110125SUPPLY CURRENT vs. TEMPERATURE(NO LOAD)TEMPERATURE (°C)S U P P L Y C U R R E N T (µA )25292735333137394143-40-105-25203550658095110125POWER-DOWN RESET DELAYvs. TEMPERATURETEMPERATURE (°C)P O W E R -D O W N R E S E T D E L A Y (µs )0.940.980.961.021.001.061.041.08-40-10520-253550658095110125NORMALIZED POWER-UP RESET TIMEOUTvs. TEMPERATUREM A X 6381/90 t o c 03TEMPERATURE (°C)N O R M A L I Z E D R E S E T T I M E O U T P E R I O D0.9900.9851.0150.9950.9901.0001.0051.0101.020-40-10520-253550958011065125M A X 6381/90 t o c 04TEMPERATURE (°C)N O R M A L I Z E D R E S E TT H R E S H O L D NORMALIZED RESET THRESHOLDvs. TEMPERATURE00.40.20.80.61.01.2063912OUTPUT VOLTAGE LOW vs. SINK CURRENTI SINK (mA)V O L (V )01.00.52.01.52.53.00500750250100012501500OUTPUT VOLTAGE HIGH vs. SOURCE CURRENTI SOURCE (µA)V O H (V )45001100010010MAXIMUM TRANSIENT DURATION vs. RESET COMPARATOR OVERDRIVE15050350250500200100400300RESET COMPARATOR OVERDRIVE, V TH - V CC (mV)M A X I M U M T R A N S I E N T D U R A T I O N (µs )3.53.93.74.54.34.14.74.95.35.15.5-40-105-25203550658095110125RESET IN TO RESET DELAYvs. TEMPERATUREM A X 6381/90 t o c 08TEMPERATURE (°C)R E S E T I N D E L A Y (µs )MAX6381–MAX6390SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits_______________________________________________________________________________________5M A X 6381–M A X 6390SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits 6_______________________________________________________________________________________Detailed DescriptionRESET OutputA µP 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 asserts when V CC is below the reset threshold;once V CC exceeds the reset threshold, an internal timer keeps the reset output asserted for the reset timeout period. After this interval, reset output deasserts. Reset output is guaranteed to be in the correct logic state for V CC ≥1V.Manual Reset Input (MAX6384/MAX6385/MAX6386/MAX6390)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 63k Ωpullup resistor (1.35k Ωfor MAX6390), so it can be left uncon-nected 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 G ND 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 environ-ment, connecting a 0.1µF capacitor from MR to G ND provides additional noise immunity.RESET IN Comparator(MAX6387/MAX6388/MAX6389)RESET IN is compared to an internal +1.27V reference.If the voltage at RESET IN is less than 1.27V, reset asserts. Use the RESET IN comparator as a user-adjustable reset detector or as a secondary power-sup-ply monitor by implementing a resistor-divider at RESET IN (shown in Figure 1). Reset asserts when either V CC or RESET IN falls below its respective threshold volt-age. Use the following equation to set the threshold:V INTH = V THRST (R1/R2 + 1)where V THRST = +1.27V. To simplify the resistor selec-tion, choose a value of R2 and calculate R1:R1 = R2 [(V INTH /V THRST ) - 1]Since the input current at RESET IN is 50nA (max),large values can be used for R2 with no significant loss in accuracy.___________Applications InformationNegative-Going V CC TransientsIn addition to issuing a reset to the µP during power-up,power-down, and brownout conditions, the MAX6381–MAX6390 are relatively immune to short dura-tion negative-going V CC transients (glitches).The Typical Operating Characteristics section shows the Maximum Transient Durations vs. Reset Comparator Overdrive, for which the MAX6381–MAX6390 do not generate a reset pulse. This graph was generated usinga negative-going pulse applied to V CC , starting above the actual reset threshold and ending below it by the magni-tude 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 transient increases (goes farther below the reset threshold), the maximum allowable pulse width decreases. A 0.1µF capacitor mounted as close as possible to V CC provides additional transient immunity.Ensuring a Valid RESET Output Down to V CC = 0The MAX6381–MAX6390 are guaranteed to operate properly down to V CC = 1V. In applications that require valid reset levels down to V CC = 0, a pulldown resistor to active-low outputs (push/pull only, Figure 2) and a pullup resistor to active-high outputs (push/pull only) will ensure that the reset line is valid while the reset output can no longer sink or source current. This scheme doesnot work with the open-drain outputs of the MAX6383/MAX6386/MAX6389/MAX6390. The resistor value used is not critical, but it must be small enough not to load the reset output when V CC is above the reset threshold. For most applications, 100k Ωis adequate.MAX6381–MAX6390SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits_______________________________________________________________________________________7M A X 6381–M A X 6390SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits 8Selector GuideChip InformationTRANSISTOR COUNT: 647PROCESS: BiCMOS*MR is for MAX6384/MAX6385/MAX6386/MAX6390**RESET IN is for MAX6387/MAX6388/MAX6389( ) are for MAX6382/MAX6385/MAX6388Pin Configurations (continued)MAX6381–MAX6390SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits_______________________________________________________________________________________9Ordering Information(continued)Note:Insert reset threshold suffix (see Reset Threshold table)after "XR" or "XS". Insert reset timeout delay (see Reset Timeout Delay table) after "D" to complete the part number. Sample stock is generally held on standard versions only (seeStandard Versions table). Standard versions have an order increment requirement of 2500 pieces. Nonstandard versions have an order increment requirement of 10,000 pieces.Contact factory for availability of nonstandard versions.*MAX6390 is available with D4 or D7 timing only.M A X 6381–M A X 6390SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits 10______________________________________________________________________________________Package InformationSC70, Single/Dual Low-Voltage, Low-Power µP Reset CircuitsMaxim 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____________________11©2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.MAX6381–MAX6390Package Information (continued)元器件交易网。
MAX3471中文资料
MAX3471
1.6µA, RS-485/RS-422, Half-Duplex, Differential Transceiver for Battery-Powered Systems
ABSOLUTE MAXIMUM RATINGS (Note 1)
Supply Voltage (VCC) ..............................................................7V Control Input Voltage (RE, DE)...................-0.3V to (VCC + 0.3V) Driver Input Voltage (DI).............................-0.3V to (VCC + 0.3V) Driver Output/Receiver Input Voltage (A, B).....................±10.5V Receiver Output Voltage (RO)....................-0.3V to (VCC + 0.3V) Continuous Power Dissipation
Three-State Current at Receiver Output
Receiver Input Resistance
∆VOC VIH VIL VHYS IIN1 IIN2
IOSD
VTH ∆VTH VOH VOL IOZR RIN
Figure 1, R = 750Ω or 27Ω
DE, DI, RE DE, DI, RE
The MAX3471 is available in an 8-pin µMAX package.
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。
MAX6314US37D4+T中文资料
General DescriptionThe MAX6314 low-power CMOS microprocessor (µP)supervisory circuit is designed to monitor power supplies in µP and digital systems. The MAX6314’s RESET output is bidirectional, allowing it to be directly connected to µPs with bidirectional reset inputs, such as the 68HC11. It provides excellent circuit reliability and low cost by eliminating external components and adjustments. The MAX6314 also provides a debounced manual reset input.This device performs a single function: it asserts a reset signal whenever the V CC supply voltage falls below a preset threshold or whenever manual reset is asserted.Reset remains asserted for an internally programmed interval (reset timeout period) after V CC has risen above the reset threshold or manual reset is deasserted.The MAX6314 comes with factory-trimmed reset threshold voltages in 100mV increments from 2.5V to 5V. Preset timeout periods of 1ms, 20ms, 140ms,and 1120ms (minimum) are also available. The device comes in a SOT143 package.F or a µP supervisor with an open-drain reset pin, see the MAX6315 data sheet.________________________ApplicationsComputers ControllersIntelligent InstrumentsCritical µP and µC Power Monitoring Portable/Battery-Powered EquipmentFeatures♦Small SOT143 Package♦RESET Output Simplifies Interface to Bidirectional Reset I/Os♦Precision Factory-Set V CC Reset Thresholds:100mV Increments from 2.5V to 5V♦±1.8% Reset Threshold Accuracy at T A = +25°C ♦±2.5% Reset Threshold Accuracy Over Temp.♦Four Reset Timeout Periods Available: 1ms, 20ms, 140ms, or 1120ms (minimum) ♦Immune to Short V CC Transients ♦5µA Supply Current♦Pin-Compatible with MAX811MAX6314*68HC11/Bidirectional-CompatibleµP Reset Circuit________________________________________________________________Maxim Integrated Products1Pin ConfigurationTypical Operating Circuit19-1090; Rev 2; 12/05Ordering Information continued at end of data sheet.*Patents PendingFor pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .Ordering Information†The MAX6314 is available in a SOT143 package, -40°C to+85°C temperature range.††The first two letters in the package top mark identify the part,while the remaining two letters are the lot tracking code.Devices are available in both leaded and lead-free packaging.Specify lead-free by replacing “-T” with “+T” when ordering.M A X 631468HC11/Bidirectional-Compatible µP Reset Circuit 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V CC = +2.5V to +5.5V, T A = -40°C to +85°C, 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.Note 1:The MAX6314 monitors V CC through an internal, factory-trimmed voltage divider that programs the nominal reset threshold.Factory-trimmed reset thresholds are available in 100mV increments from 2.5V to 5V (see Ordering and Marking Information ).Note 2:This is the minimum time RESET must be held low by an external pull-down source to set the active pull-up flip-flop.Note 3:Measured from RESET V OL to (0.8 x V CC ), R LOAD = ∞.V CC ........................................................................-0.3V to +6.0V All Other Pins..............................................-0.3V to (V CC + 0.3V)Input Current (V CC ).............................................................20mA Output Current (RESET )......................................................20mA Rate of Rise (V CC )...........................................................100V/µsContinuous Power Dissipation (T A = +70°C)SOT143 (derate 4mW/°C above +70°C).......................320mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering, 10sec).............................+300°CMAX631468HC11/Bidirectional-CompatibleµP Reset Circuit_______________________________________________________________________________________3__________________________________________Typical Operating Characteristics(T A = +25°C, unless otherwise noted.)4.7k Ω PULL-UP 2V/divMAX6314 PULL-UP 2V/divINPUT 5V/div200ns/divPULLUP CHARACTERISTICS100pF4.7k Ω+5V74HC0574HC05V CCGNDMR 100pF+5VRESETMAX63146-50-303090SUPPLY CURRENT vs. TEMPERATURE215TEMPERATURE (°C)S U P P L Y C U R R E N T (µA )-101050347060135SUPPLY CURRENT vs. SUPPLY VOLTAGE215SUPPLY VOLTAGE (V)S U P P L Y C U R R E N T (µA )2344500-50-301090POWER-DOWN RESET DELAYvs. TEMPERATURE1040TEMPERATURE (°C)P O W E R -D O W N R E S E T D E L A Y (µs )-1020303050701.040.96-50-301090NORMALIZED RESET TIMEOUT PERIOD vs. TEMPERATURE (V CC RISING)0.970.981.021.001.03M A X 6314-05TEMPERATURE (°C)N O R M A L I Z E D R E S E T T I M E O U T P E R I O D -100.991.013050701.0060.994-50-301090NORMALIZED RESET THRESHOLD vs. TEMPERATURE (V CC FALLING)0.9960.9981.0041.000M A X 6314-06TEMPERATURE (°C)N O R M A L I Z E D R E S E T T H R E S H O L D-101.0023050701000101001000MAXIMUM TRANSIENT DURATION vs. RESET COMPARATOR OVERDRIVE20RESET COMP. OVERDRIVE, V TH - V CC (mV)M A X I M U M T R A N S I E N T D U R A T I O N (µs )4060806000-50-301090RESET PULLUP TIME vs. TEMPERATURE100200500300TEMPERATURE (°C)R E S E T P U L L -U P -T I M E (n s )-10400305070Figure 1. Functional Diagram M A X 631468HC11/Bidirectional-Compatible µP Reset Circuit 4_____________________________________________________________________________________________________________________________________________________Pin DescriptionSupply Voltage and Reset Threshold Monitor InputV CC4Manual Reset Input. A logic low on MR asserts reset. Reset remains asserted as long as MR is low, and for the reset timeout period (t RP ) after the reset conditions are terminated. Connect to V CC if not used.MR 3PIN Active-Low Complementary Output. In addition to the normal n-channel pulldown, RESET has a p-channel pullup transistor in parallel with a 4.7k Ωresistor to facilitate connection to µPs with bidirectional resets. See the Reset Output section.RESET2GroundGND 1FUNCTIONNAMEMAX631468HC11/Bidirectional-CompatibleµP Reset Circuit_______________________________________________________________________________________5Detailed DescriptionThe MAX6314 has a reset output consisting of a 4.7k Ωpull-up resistor in parallel with a P-channel transistor and an N-channel pull down (Figure 1), allowing this IC to directly interface with microprocessors (µPs) that have bidirectional reset pins (see the Reset Output section).Reset OutputA µP’s reset input starts the µP in a known state. The MAX6314 asserts 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 (see the Electrical Characteristics table).Once V CC exceeds the reset threshold, the internal timer keeps reset asserted for the reset timeout period (t RP ); after this interval RESET goes high. If a brownout condition occurs (monitored voltage dips below its pro-grammed reset threshold), RESET goes low. Any time V CC dips below the reset threshold, the internal timer resets to zero and RESET goes low. The internal timer starts when V CC returns above the reset threshold, and RESET remains low for the reset timeout period.The MAX6314’s RESET output is designed to interface with µPs that have bidirectional reset pins, such as the Motorola 68HC11. Like an open-drain output, the MAX6314 allows the µP or other devices to pull RESET low and assert a reset condition. However, unlike a standard open-drain output, it includes the commonly specified 4.7k Ωpullup resistor with a P-channel active pullup in parallel.This configuration allows the MAX6314 to solve a prob-lem associated with µPs that have bidirectional reset pins in systems where several devices connect to RESET . These µPs can often determine if a reset was asserted by an external device (i.e., the supervisor IC)or by the µP itself (due to a watchdog fault, clock error,or other source), and then jump to a vector appropriate for the source of the reset. However, if the µP does assert reset, it does not retain the information, but must determine the cause after the reset has occurred.The following procedure describes how this is done with the Motorola 68HC11. In all cases of reset, the µP pulls RESET low for about four E-clock cycles. It then releases RESET , waits for two E-clock cycles, then checks RESET ’s state. If RESET is still low, the µP con-cludes that the source of the reset was external and,when RESET eventually reaches the high state, jumps to the normal reset vector. In this case, stored state information is erased and processing begins fromscratch. If, on the other hand, RESET is high after the two E-clock cycle delay, the processor knows that it caused the reset itself and can jump to a different vec-tor and use stored state information to determine what caused the reset.The problem occurs with faster µPs; two E-clock cycles is only 500ns at 4MHz. When there are several devices on the reset line, the input capacitance and stray capacitance can prevent RESET from reaching the logic-high state (0.8 x V CC ) in the allowed time if only a passive pullup resistor is used. In this case, all resets will be interpreted as external. The µP is guaranteed to sink only 1.6mA, so the rise time cannot be much reduced by decreasing the recommended 4.7k Ωpullup resistance.The MAX6314 solves this problem by including a pullup transistor in parallel with the recommended 4.7k Ωresis-tor (Figure 1). The pullup resistor holds the output high until RESET is forced low by the µP reset I/O, or by the MAX6314 itself. Once RESET goes below 0.5V, a com-parator sets the transition edge flip-flop, indicating that the next transition for RESET will be low to high. As soon as RESET is released, the 4.7k Ωresistor pulls RESET up toward V CC . When RESET rises above 0.5V,the active p-channel pullup turns on for the 2µs duration of the one-shot. The parallel combination of the 4.7k Ωpullup and the p-channel transistor on-resistance quickly charges stray capacitance on the reset line, allowing RESET to transition low to high with-in the required two E-clock period, even with several devices on the reset line (Figure 2). Once the one-shot times out, the p-channel transistor turns off. This process occurs regardless of whether the reset was caused by V CC dipping below the reset threshold, MR being asserted, or the µP or other device asserting RESET . Because the MAX6314 includes the standard 4.7k Ωpullup resistor, no external pullup resistor is required. To minimize current consumption, the internal pullup resistor is disconnected whenever the MAX6314asserts RESET .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 after MR returns high. To minimize current consumption, the internal 4.7k Ωpullup resistor on RESET is disconnected whenever RESET is asserted.M A X 631468HC11/Bidirectional-Compatible µP Reset Circuit 6_______________________________________________________________________________________MR has an internal 63k Ωpullup resistor, so it can be left open if not used. Connect a normally open momen-tary 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.__________Applications InformationNegative-Going V CC TransientsIn addition to issuing a reset to the µP during power-up,power-down, and brownout conditions, these devices are relatively immune to short-duration negative-going transients (glitches). The T ypical Operating Character-istics show the Maximum Transient Duration vs. Reset Threshold Overdrive, for which reset pulses are not generated. The graph was produced using negative-going pulses, starting at V RST max and ending below the programmed reset threshold by the magnitude indicated (reset threshold overdrive). The graph shows the maximum pulse width that a negative-going V CC transient may typically have without causing a reset pulse to be issued. As the amplitude of the transient increases (i.e., goes farther below the reset threshold),the maximum allowable pulse width decreases. A 0.1µF bypass capacitor mounted close to V CC provides addi-tional transient immunity.Ensuring a Valid RESET OutputDown to V CC = 0VWhen V CC falls below 1V, RESET no longer sinks current—it becomes an open circuit. Therefore, high-impedance CMOS-logic inputs connected to RESET 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 RESET must be valid down to V CC = 0V, adding a pull-down resistor to RESET will cause any stray leakage currents to flow to ground,holding RESET low (Figure 3). R1’s value is not critical;100k Ωis large enough not to load RESET and small enough to pull RESET to ground.Figure 2. MAX6314 Supports Additional Devices on the Reset BusFigure 3. RESET Valid to V CC = Ground CircuitMAX631468HC11/Bidirectional-CompatibleµP Reset Circuit_______________________________________________________________________________________7Figure 4. RESET Timing Diagram†The MAX6314 is available in a SOT143 package, -40°C to +85°C temperature range.††The first two letters in the package top mark identify the part, while the remaining two letters are the lot tracking code.†††Sample stocks generally held on the bolded products; also, the bolded products have 2,500 piece minimum-order quantities.Non-bolded products have 10,000 piece minimum-order quantities. Contact factory for details.Devices are available in both leaded and lead-free packaging. Specify lead-free by replacing “-T” with “+T” when ordering.Note:All devices available in tape-and-reel only. Contact factory for availability.___________________________________________Ordering Information (continued)M A X 631468HC11/Bidirectional-Compatible µP Reset Circuit Maxim 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©2005 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products, Inc._____________________________Ordering and Marking Information (continued)†The MAX6314 is available in a SOT143 package, -40°C to +85°C temperature range.††The first two letters in the package top mark identify the part, while the remaining two letters are the lot tracking code.†††Sample stocks generally held on the bolded products; also, the bolded products have 2,500 piece minimum-order quantities.Non-bolded products have 10,000 piece minimum-order quantities. Contact factory for details.Devices are available in both leaded and lead-free packaging. Specify lead-free by replacing “-T” with “+T” when ordering.Note:All devices available in tape-and-reel only. Contact factory for availability.Chip InformationTRANSISTOR COUNT: 519Package InformationFor the latest package outline information, go to /packages .。
MAX412CSA+,MAX412ESA+,MAX410ESA+,MAX412CPA+,MAX412EPA+,MAX414CSD+,MAX410BCSA, 规格书,Datasheet 资料
Applications
Low-Noise Frequency Synthesizers Infrared Detectors High-Quality Audio Amplifiers Ultra Low-Noise Instrumentation Amplifiers Bridge Signal Conditioning
ELECTRICAL CHARACTERISTICS
(V+ = 5V, V- = -5V, TA = +25°C, unless otherwise noted.)
PARAMETER Input Offset Voltage Input Bias Current Input Offset Current Differential Input Resistance Common-Mode Input Resistance Input Capacitance SYMBOL VOS IB IOS RIN(Diff) RIN(CM) CIN MAX410, MAX412, MAX414 Input Noise-Voltage Density en MAX410B, MAX412B, MAX414B fO = 10Hz fO = 1000Hz ±3.5 VCM = ±3.5V VS = ±2.4V to ±5.25V RL = 2kΩ, VO = ±3.6V RL = 600Ω, VO = ±3.5V RL = 2kΩ 115 96 115 110 +3.6 -3.7 10Hz 1000Hz (Note 2) 1000Hz (Note 2) CONDITIONS MAX410, MAX410B, MAX412, MAX412B MAX414, MAX414B MIN TYP ±120 ±150 ±80 ±40 20 40 4 7 1.5 2.4 2.6 1.2 +3.7/ -3.8 130 103 122 120 +3.7/ -3.8 35 10kΩ || 20pF load 10kΩ || 20pF load To 0.1% fO = 1kHz 4.5 28 1.3 135 2.4 4.0 pA√Hz V dB dB dB V mA V/µs MHz µs dB nV√Hz MAX ±250 ±320 ±150 ±80 UNITS µV nA nA kΩ MΩ pF
XC6385中文资料
概 要
XC6383系列是PFM(频率)工作模式升压型DC/DC转换器。采用 COMS工艺和激光微调技术，达到了低电流消耗、高精度。 该器件降低了应用于传呼器时多成为问题的转换时的高频噪 声。在2.0V～7.0V范围内，能以0.1V间隔设定输出电压。最大 工作频率为100kHz。 由于内置开关晶体管，只需外置线圈、二极管、电容器3种元 件，可构建升压电路。 此外，还备有具备用以停止工作以此抑制电流消耗的CE(停机 控制)功能、以及可用于反激电路的、有独立VDD端(将电源和 检测电压端分开)的产品。 备有SOT-89-5以及超小型的SOT-23和SOT-25封装。
引脚排列
3
SOT-23 (TOP VIEW)
1
2
5
4
SOT-25 (TOP VIEW)
123
SOT-89 (TOP VIEW)
1
2
3
5
4
SOT-89-5 (TOP VIEW)
1
2
3
引脚说明
ቤተ መጻሕፍቲ ባይዱ
(2) XC6385C
引脚序号
SOT-25 SOT-89-5
4
5
2
2
5
4
1
3
3
1
符号
VSS VOUT LX CE NC
元器４件．交D易C/网DCw转ww换.c器ecb2_b__._c_o_m____________________________________________________________________________________
XC6385系列 传呼器用PFM(频率)控制DC/DC控制器/转换器
选择指南
开始
3 管脚型 内置晶体管
MAX4014EUK中文资料
5-pin SOT23 (derate 7.1mW/°C above+70°C)..............571mW 8-pin SO (derate 5.9mW/°C above +70°C)...................471mW
8-pin µMAX (derate 4.1mW/°C above +70°C) ..............330mW 14-pin SO (derate 8.3mW/°C above +70°C).................667mW 16-pin QSOP (derate 8.3mW/°C above +70°C)............667mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10sec) .............................+300°C
MAX479CSD+T中文资料
___________________________Features
o 17µA Max Supply Current (MAX478A/MAX479A) o 70µV Max Offset Voltage (MAX478A) o Single-Supply Operation: Input Voltage Range Includes Ground Output Swings to Ground While Sinking Current No Pull-Down Resistors Required o Dual Op Amp in 8-Pin DIP/SO Package (MAX478) Quad Op Amp in 14-Pin DIP/SO Package (MAX479) o 250pA Max Input Offset Current (MAX478A/MAX479A) o 0.5µV/°C Offset-Voltage Drift o Output Sources and Sinks 5mA Load Current
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.
MAXIM MAX4212 MAX4213 说明书
General DescriptionThe MAX4212/MAX4213 single, MAX4216 dual,MAX4218 triple, and MAX4220 quad op amps are unity-gain-stable devices that combine high-speed per-formance with Rail-to-Rail ®outputs. The MAX4213/MAX4218 have a disable feature that reduces power-supply current to 400µA and places the outputs into a high-impedance state. These devices operate from a 3.3V to 10V single supply or from ±1.65V to ±5V dual supplies. The common-mode input voltage range extends beyond the negative power-supply rail (ground in single-supply applications).These devices require only 5.5mA of quiescent supply current while achieving a 300MHz -3dB bandwidth and a 600V/µs slew rate. I nput-voltage noise is only 10nV/√Hz and input-current noise is only 1.3pA/√Hz for either the inverting or noninverting input. These parts are an excellent solution in low-power/low-voltage sys-tems that require wide bandwidth, such as video, com-munications, and instrumentation. I n addition, when disabled, their high-output impedance makes them ideal for multiplexing applications.The MAX4212 comes in a miniature 5-pin SOT23 pack-age, while the MAX4213/MAX4216 come in 8-pin µMAX and SO packages. The MAX4218/MAX4220 are available in space-saving 16-pin QSOP and 14-pin SO packages.ApplicationsBattery-Powered Instruments Video Line DriverAnalog-to-Digital Converter Interface CCD Imaging SystemsVideo Routing and Switching SystemsFeatureso High Speed:300MHz -3dB Bandwidth (MAX4212/MAX4213)200MHz -3dB Bandwidth(MAX4216/MAX4218/MAX4220)50MHz 0.1dB Gain Flatness (MAX4212/MAX4213)600V/µs Slew Rate o Single 3.3V/5.0V Operation o Rail-to-Rail Outputso Input Common-Mode Range Extends Beyond V EE o Low Differential Gain/Phase: 0.02%/0.02°o Low Distortion at 5MHz:-78dBc SFDR-75dB Total Harmonic Distortion o High-Output Drive: ±100mAo 400µA Shutdown Capability (MAX4213/MAX4218)o High-Output Impedance in Off State (MAX4213/MAX4218)o Space-Saving SOT23, µMAX, or QSOP PackagesMAX4212/MAX4213/MAX4216/MAX4218/MAX4220Miniature, 300MHz, Single-Supply, Rail-to-Rail Op Amps with Enable________________________________________________________________Maxim Integrated Products1Pin ConfigurationsTypical Operating CircuitOrdering Information continued at end of data sheet.Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .M A X 4212/M A X 4213/M A X 4216/M A X 4218/M A X 4220Miniature, 300MHz, Single-Supply, Rail-to-Rail Op Amps with Enable 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSDC ELECTRICAL CHARACTERISTICS(V CC = 5V, V EE = 0, EN_ = 5V, R L = 2k Ωto V CC /2, V OUT = V CC /2, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)Supply Voltage (V CC to V EE )..................................................12V IN_-, IN_+, OUT_, EN_.....................(V EE - 0.3V) to (V CC + 0.3V)Output Short-Circuit Duration to V CC or V EE .............Continuous Continuous Power Dissipation (T A = +70°C)5-Pin SOT23 (derate 7.1mW/°C above +70°C)...........571mW 8-Pin SO (derate 5.9mW/°C above +70°C).................471mW8-Pin µMAX (derate 4.5mW/°C above +70°C)............221mW 14-Pin SO (derate 8.3mW/°C above +70°C)...............667mW 16-Pin QSOP (derate 8.3mW/°C above +70°C)..........667mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°CStresses 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 at 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.DC ELECTRICAL CHARACTERISTICS (continued) MAX4212/MAX4213/MAX4216/MAX4218/MAX4220Miniature, 300MHz, Single-Supply, Rail-to-Rail Op Amps with Enable (V CC= 5V, V EE= 0, EN_ = 5V, R L= 2kΩto V CC/2, V OUT= V CC/2, T A= T MIN to T MAX, unless otherwise noted. Typical values are atT A= +25°C.)M A X 4212/M A X 4213/M A X 4216/M A X 4218/M A X 4220Miniature, 300MHz, Single-Supply, Rail-to-Rail Op Amps with Enable 4_______________________________________________________________________________________Note 1:Tested with V CM = 2.5V.Note 2:PSR for single 5V supply tested with V EE = 0, V CC = 4.5V to 5.5V; for dual ±5V supply with V EE = -4.5V to -5.5V,V CC = 4.5V to 5.5V; and for single 3.3V supply with V EE = 0, V CC = 3.15V to 3.45V.Note 3: Does not include the external feedback network ’s impedance.AC ELECTRICAL CHARACTERISTICS(V CC = 5V, V EE = 0, V CM = 2.5V, EN_ = 5V, R F = 24Ω, R L = 100Ωto V CC /2, V OUT = V CC /2, A VCL = +1, T A = +25°C, unless otherwise noted.)MAX4212/MAX4213/MAX4216/MAX4218/MAX4220Miniature, 300MHz, Single-Supply, Rail-to-Rail Op Amps with Enable_______________________________________________________________________________________54-6100k1M10M100M1G MAX4212/MAX4213SMALL-SIGNAL GAIN vs. FREQUENCY-4FREQUENCY (Hz)G A I N (d B )-2023-5-3-113-7100k 1M 10M 100M 1G MAX4216/MAX4218/MAX4220SMALL-SIGNAL GAIN vs. FREQUENCY-5FREQUENCY (Hz)G A I N (d B )-3-112-6-4-209-1100k 1M 10M 100M 1GMAX4212/MAX4213SMALL-SIGNAL GAIN vs. FREQUENCY1FREQUENCY (Hz)G A I N (d B )357802469-1100k 1M 10M 100M 1G MAX4216/MAX4218/MAX4220SMALL-SIGNAL GAIN vs. FREQUENCY1FREQUENCY (Hz)G A I N (d B )357802460.5-0.50.1M1M10M100M1GMAX4216/MAX4218/MAX4220GAIN FLATNESS vs. FREQUENCY-0.3M A X 4212/3/6/8/20-07FREQUENCY (Hz)G A I N (d B )-0.10.10.30.4-0.4-0.200.24-6100k 1M 10M 100M 1G LARGE-SIGNAL GAIN vs. FREQUENCY-4FREQUENCY (Hz)G A I N (d B )-2023-5-3-110.7-0.30.1M 1M 10M 100M 1GMAX4212/MAX4213GAIN FLATNESS vs. FREQUENCY-0.1M A X 4212/3/6/8/20-06FREQUENCY (Hz)G A I N (d B )0.10.30.50.6-0.200.20.450-150100k1M10M100M1GMAX4216/MAX4218/MAX4220CROSSTALK vs. FREQUENCY-110M A X 4212/3/6/8/20-08FREQUENCY (Hz)C R O S S T A L K (d B )-70-301030-130-90-50-1010000.10.1M1M10M100MCLOSED-LOOP OUTPUT IMPEDANCEvs. FREQUENCYM A X 4212/3/6/8/20-09FREQUENCY (Hz)I M P E D A N C E (Ω)100110__________________________________________Typical Operating Characteristics(V CC = 5V, V EE = 0, A VCL = 1, R F = 24Ω, R L = 100Ωto V CC /2, T A = +25°C, unless otherwise noted.)M A X 4212/M A X 4213/M A X 4216/M A X 4218/M A X 4220Miniature, 300MHz, Single-Supply, Rail-to-Rail Op Amps with Enable 6_______________________________________________________________________________________0-100100k 1M 10M 100M HARMONIC DISTORTION vs. FREQUENCY (A VCL = 1)-80FREQUENCY (Hz)H A R M O N I C D I S T O R T I O N (d B c )-60-40-20-10-90-70-50-300-100100k 1M 10M 100MHARMONIC DISTORTION vs. FREQUENCY (A VCL = 2)-80FREQUENCY (Hz)H A R M O N I C D I S T O R T I O N (d B c )-60-40-20-10-90-70-50-300-100100k1M10M100MHARMONIC DISTORTION vs. FREQUENCY (A VCL = 5)-80FREQUENCY (Hz)H A R M O N I C D I S T O R T I O N (d B c )-60-40-20-10-90-70-50-300-10-20-30-60-70-90-80-40-50-100LOAD (Ω)2004006008001000HARMONIC DISTORTIONvs. LOADH A R M O N I C D I S T O R T I O N (d B c )0-100100k1M10M100MCOMMON-MODE REJECTIONvs. FREQUENCY-80M A X 4212/3/6/8/20-16FREQUENCY (Hz)C M R (d B )-60-40-20-10-90-70-50-300-10-20-30-60-70-90-80-40-50-100OUTPUT SWING (V P-P )0.51.0 1.52.0HARMONIC DISTORTION vs. OUTPUT SWINGH A R M O N I C D I S T O R T I O N (d B c )100DIFFERENTIAL GAIN AND PHASEIRED I F F . P H A SE (d e g )D I F F . G A I N (%)20-80100k1M10M100MPOWER-SUPPLY REJECTIONvs. FREQUENCY-60M A X 4212/3/6/8/20-17FREQUENCY (Hz)P O W E R -S U P P L Y R E J E C T I O N (dB )-40-20010-70-50-30-10 4.54.03.52.52.01.53.01.0LOAD RESISTANCE (Ω)255075100125150OUTPUT SWINGvs. LOAD RESISTANCE (R L )O U T P U T S W I N G (V p -p )____________________________Typical Operating Characteristics (continued)(V CC = 5V, V EE = 0, A VCL = 1, R F = 24Ω, R L = 100Ωto V CC /2, T A = +25°C, unless otherwise noted.)MAX4212/MAX4213/MAX4216/MAX4218/MAX4220Miniature, 300MHz, Single-Supply, Rail-to-Rail Op Amps with Enable_______________________________________________________________________________________7IN (50mV/div)OUT (25mV/div)V O L T A G ESMALL-SIGNAL PULSE RESPONSE(A VCL = 1)MAX4212/3/6/8/20-1920ns/divV CM = 2.5V, R L = 100Ω to GROUNDIN (25mV/div)OUT (25mV/div)V O L T A G ESMALL-SIGNAL PULSE RESPONSE(A VCL = 2)MAX4212/3/6/8/20-2020ns/divV CM = 1.25V, R L = 100Ω to GROUNDIN (50mV/div)OUT (25mV/div)V O L T A G E SMALL-SIGNAL PULSE RESPONSE(C L = 5pF, A VCL = 1)MAX4212/3/6/8/20-2120ns/divV CM = 1.75V, R L = 100Ω to GROUNDIN (1V/div)OUT (1V/div)V O L T A G ELARGE-SIGNAL PULSE RESPONSE(A VCL = 1)MAX4212/3/6/8/20-2220ns/divV CM = 1.75V, R L = 100Ω to GROUND1001011101k10M1MMAX4213VOLTAGE-NOISE DENSITYvs. FREQUENCYM AX 4212/3/6/8/20-25FREQUENCY (Hz)N O I S E (n V /√H z )10010k 100kIN (500mV/div)OUT (500mV/div)V O L T A G ELARGE-SIGNAL PULSE RESPONSE(A VCL = 2)MAX4212/3/6/8/20-2320ns/divV CM = 0.9V, R L = 100Ω to GROUNDIN (1V/div)OUT (500mV/div)V O L T A G ELARGE-SIGNAL PULSE RESPONSE(C L = 5pF, A VCL = 2)MAX4212/3/6/8/20-2420ns/divV CM = 1.75V, R L = 100Ω to GROUND1011101k10M1MMAX4218CURRENT-NOISE DENSITYvs. FREQUENCYM A X 4212/3/6/8/20-26FREQUENCY (Hz)N O I S E (p A /√H z )10010k 100kEN_5.0V (ENABLE)(DISABLE)1VOUT ENABLE RESPONSE TIMEMAX4212/3/6/8/20-271µs/divV IN = 1.0V____________________________Typical Operating Characteristics (continued)(V CC = 5V, V EE = 0, A VCL = 1, R F = 24Ω, R L = 100Ωto V CC /2, T A = +25°C, unless otherwise noted.)M A X 4212/M A X 4213/M A X 4216/M A X 4218/M A X 4220Miniature, 300MHz, Single-Supply, Rail-to-Rail Op Amps with Enable 8_______________________________________________________________________________________705060403020M A X 4212/3/6/8/20-28LOAD RESISTANCE (Ω)2004006008001kOPEN-LOOP GAIN vs. LOAD RESISTANCEO P E N -L O O P G A I N (d B )400350300250150501002000M A X 4212/3/6/8/20-29LOAD RESISTANCE (Ω)100200500400300600CLOSED-LOOP BANDWIDTH vs. LOAD RESISTANCEC L O S ED -L O O P B A N D W I D T H (M H z )10-90100k10M100M1MOFF-ISOLATION vs. FREQUENCY-80M A X 4212/3/6/8/20-30FREQUENCY (Hz)O F F -I S O L A T I O N (d B )-70-60-50-40-30-20-100 76453M A X 4212/3/6/8/20-31TEMPERATURE (°C)-25-500755025100POWER-SUPPLY CURRENT vs. TEMPERATUREP O W E R -S U P P L Y C U R R E N T (m A )1086420M A X 4212/3/6/8/20-34POWER-SUPPLY VOLTAGE (V)43567891011POWER-SUPPLY CURRENT vs. POWER-SUPPLY VOLTAGEP O W E R -S U P P L Y C U R R E N T (m A )6.05.54.55.04.0M A X 4212/3/6/8/20-32TEMPERATURE (°C)-25-500755025100INPUT BIAS CURRENT vs. TEMPERATUREI N P U T B I A S C U R R E N T (µA )0.200.160.120.040.080M A X 4212/3/6/8/20-33TEMPERATURE (°C)-25-500755025100INPUT OFFSET CURRENT vs. TEMPERATUREI N P U T O F F S E T C U R R E N T (µA )543120M A X 4212/3/6/8/20-35TEMPERATURE (°C)-25-500755025100INPUT OFFSET VOLTAGE vs. TEMPERATUREI N P U T O F F S E T V O L T A G E (m V )5.04.84.64.24.44.0TEMPERATURE (°C)-25-500755025100VOLTAGE SWING vs. TEMPERATUREV O L T A G E S W I N G (V p -p )____________________________Typical Operating Characteristics (continued)(V CC = 5V, V EE = 0, A VCL = 1, R F = 24Ω, R L = 100Ωto V CC /2, T A = +25°C, unless otherwise noted.)______________________________________________________________Pin DescriptionMAX4212/MAX4213/MAX4216/MAX4218/MAX4220Miniature, 300MHz, Single-Supply, Rail-to-Rail Op Amps with EnableM A X 4212/M A X 4213/M A X 4216/M A X 4218/M A X 4220_______________Detailed DescriptionThe MAX4212/MAX4213/MAX4216/MAX4218/MAX4220are single-supply, rail-to-rail, voltage-feedback ampli-fiers that employ current-feedback techniques to achieve 600V/µs slew rates and 300MHz bandwidths.Excellent harmonic distortion and differential gain/phase performance make these amplifiers an ideal choice for a wide variety of video and RF signal-processing applications.The output voltage swing comes to within 50mV of each supply rail. Local feedback around the output stage assures low open-loop output impedance to reduce gain sensitivity to load variations. This feedback also produces demand-driven current bias to the output transistors for ±100mA drive capability, while constrain-ing total supply current to less than 7mA. The input stage permits common-mode voltages beyond the nega-tive supply and to within 2.25V of the positive supply rail.__________Applications InformationChoosing Resistor ValuesUnity-Gain ConfigurationThe MAX4212/MAX4213/MAX4216/MAX4218/MAX4220are internally compensated for unity gain. When config-ured for unity gain, the devices require a 24Ωresistor (R F ) in series with the feedback path. This resistorimproves AC response by reducing the Q of the parallel LC circuit formed by the parasitic feedback capaci-tance and inductance.Inverting and Noninverting ConfigurationsSelect the gain-setting feedback (R F ) and input (R G )resistor values to fit your application. Large resistor val-ues increase voltage noise and interact with the amplifi-er ’s input and PC board capacitance. This can generate undesirable poles and zeros and decrease bandwidth or cause oscillations. For example, a nonin-verting gain-of-two configuration (R F = R G ) using 1k Ωresistors, combined with 1pF of amplifier input capaci-tance and 1pF of PC board capacitance, causes a pole at 159MHz. Since this pole is within the amplifier band-width, it jeopardizes stability. Reducing the 1k Ωresis-tors to 100Ωextends the pole frequency to 1.59GHz,but could limit output swing by adding 200Ωin parallel with the amplifier ’s load resistor. Table 1 shows sug-gested feedback, gain resistors, and bandwidth for several gain values in the configurations shown in Figures 1a and 1b.Layout and Power-Supply BypassingThese amplifiers operate from a single 3.3V to 11V power supply or from dual supplies to ±5.5V. For single-supply operation, bypass V CC to ground with a 0.1µF capacitor as close to the pin as possible. If operating with dual sup-plies, bypass each supply with a 0.1µF capacitor.Miniature, 300MHz, Single-Supply, Rail-to-Rail Op Amps with Enable 10______________________________________________________________________________________Figure 1a. Noninverting Gain Configuration Figure 1b. Inverting Gain ConfigurationMaxim recommends using microstrip and stripline tech-niques to obtain full bandwidth. To ensure that the PC board does not degrade the amplifier ’s performance,design it for a frequency greater than 1GHz. Pay care-ful attention to inputs and outputs to avoid large para-sitic capacitance. Whether or not you use a constant-impedance board, observe the following guidelines when designing the board:•Don ’t use wire-wrap boards because they are too inductive.•Don ’t use IC sockets because they increase parasitic capacitance and inductance.•Use surface-mount instead of through-hole compo-nents for better high-frequency performance.•Use a PC board with at least two layers; it should be as free from voids as possible.•Keep signal lines as short and as straight as possi-ble. Do not make 90°turns; round all corners.Rail-to-Rail Outputs, Ground-Sensing InputThe input common-mode range extends from (V EE - 200mV) to (V CC - 2.25V) with excellent common-mode rejection. Beyond this range, the amplifier output is a nonlinear function of the input, but does not under-go phase reversal or latchup.The output swings to within 50mV of either power-supply rail with a 10k Ωload. The input ground-sensing and the rail-to-rail output substantially increase the dynamic range. With a symmetric input in a single 5V application, the input can swing 2.95V P-P , and the out-put can swing 4.9V P-P with minimal distortion.Enable Input and Disabled OutputThe enable feature (EN_) allows the amplifier to be placed in a low-power, high-output-impedance state.Typically, the EN_ logic low input current (I IL ) is small.However, as the EN voltage (V IL ) approaches the nega-tive supply rail, I IL increases (Figure 2). A single resis-tor connected as shown in Figure 3 prevents the rise in the logic-low input current. This resistor provides a feedback mechanism that increases V IL as the logic input is brought to V EE . Figure 4 shows the resulting input current (I IL ).When the MAX4213/MAX4218 are disabled, the amplifi-er ’s output impedance is 35k Ω. This high resistance and the low 2pF output capacitance make these parts ideal in RF/video multiplexer or switch applications. For larger arrays, pay careful attention to capacitive load-ing. See the Output Capacitive Loading and Stability section for more information.MAX4212/MAX4213/MAX4216/MAX4218/MAX4220Miniature, 300MHz, Single-Supply, Rail-to-Rail Op Amps with Enable______________________________________________________________________________________11Table 1. Recommended Component ValuesNote:R L = R O + R TO ; R TIN and R TO are calculated for 50Ωapplications. For 75Ωsystems, R TO = 75Ω; calculate R TIN from thefollowing equation:R =751-75R TIN GΩM A X 4212/M A X 4213/M A X 4216/M A X 4218/M A X 4220Output Capacitive Loading and StabilityThe MAX4212/MAX4213/MAX4216/MAX4218/MAX4220are optimized for AC performance. They are not designed to drive highly reactive loads, which de-creases phase margin and may produce excessive ringing and oscillation. Figure 5 shows a circuit that eliminates this problem. Figure 6 is a graph of the opti-mal isolation resistor (R S ) vs. capacitive load. Figure 7shows how a capacitive load causes excessive peak-ing of the amplifier ’s frequency response if the capaci-tor is not isolated from the amplifier by a resistor. A small isolation resistor (usually 20Ωto 30Ω) placed before the reactive load prevents ringing and oscilla-tion. At higher capacitive loads, AC performance is controlled by the interaction of the load capacitance and the isolation resistor. Figure 8 shows the effect of a 27Ωisolation resistor on closed-loop response.Coaxial cable and other transmission lines are easily driven when properly terminated at both ends with their characteristic impedance. Driving back-terminated transmission lines essentially eliminates the line ’s capacitance.Miniature, 300MHz, Single-Supply, Rail-to-Rail Op Amps with Enable 12______________________________________________________________________________________Figure 4. Enable Logic-Low Input Current vs. V IL with 10k ΩSeries ResistorFigure 3. Circuit to Reduce Enable Logic-Low Input CurrentFigure 7. Small-Signal Gain vs. Frequency with Load Capacitance and No Isolation Resistor Figure 8. Small-Signal Gain vs. Frequency with Load Capacitance and 27ΩIsolation ResistorMAX4212/MAX4213/MAX4216/MAX4218/MAX4220Miniature, 300MHz, Single-Supply, Rail-to-Rail Op Amps with Enable______________________________________________________________________________________13M A X 4212/M A X 4213/M A X 4216/M A X 4218/M A X 4220Miniature, 300MHz, Single-Supply, Rail-to-Rail Op Amps with Enable 14______________________________________________________________________________________Pin Configurations (continued)MAX4212/MAX4213/MAX4216/MAX4218/MAX4220Miniature, 300MHz, Single-Supply, Rail-to-Rail Op Amps with Enable_Ordering Information (continued)MAX4216 TRANSISTOR COUNT: 190MAX4218 TRANSISTOR COUNT: 299MAX4220 TRANSISTOR COUNT: 362Package 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 .)M A X 4212/M A X 4213/M A X 4216/M A X 4218/M A X 4220Miniature, 300MHz, Single-Supply, Rail-to-Rail Op Amps with EnableMaxim 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.16____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2003 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 .)。
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
General DescriptionThe MAX6381–MAX6390 microprocessor (µP) supervisory circuits monitor power supply voltages from +1.8V to +5.0V while consuming only 3µA of supply current at +1.8V. Whenever V CC falls below the factory-set reset thresholds, the reset output asserts and remains assert-ed for a minimum reset timeout period after V CC rises above the reset threshold. Reset thresholds are available from +1.58V to +4.63V, in approximately 100mV incre-ments. Seven minimum reset timeout delays ranging from 1ms to 1200ms are available.The MAX6381/MAX6384/MAX6387 have a push-pull active-low reset output. The MAX6382/MAX6385/MAX6388 have a push-pull active-high reset output,and the MAX6383/MAX6386/MAX6389/MAX6390 have an open-drain active-low reset output. The MAX6384/MAX6385/MAX6386 also feature a debounced manual reset input (with internal pullup resistor). The MAX6387/MAX6388/MAX6389 have an auxiliary input for monitoring a second voltage. The MAX6390 offers a manual reset input with a longer V CC reset timeout period (1120ms or 1200ms) and a shorter manual reset timeout (140ms or 150ms).The MAX6381/MAX6382/MAX6383 are available in 3-pin SC70 packages and the MAX6384–MAX6390 are avail-able in 4-pin SC70 packages.________________________ApplicationsComputers ControllersIntelligent InstrumentsCritical µP and µC Power Monitoring Portable/Battery-Powered Equipment Dual Voltage SystemsFeatureso Factory-Set Reset Threshold Voltages Ranging from +1.58V to +4.63V in Approximately 100mV Increments o ±2.5% Reset Threshold Accuracy Over Temperature (-40°C to +125°C)o Seven Reset Timeout Periods Available: 1ms,20ms, 140ms, 280ms, 560ms, 1120ms, 1200ms (min)o 3 Reset Output OptionsActive-Low Push-Pull Active-High Push-Pull Active-Low Open-Draino Reset Output State Guaranteed Valid Down to V CC = 1Vo Manual Reset Input (MAX6384/MAX6385/MAX6386)o Auxiliary RESET IN(MAX6387/MAX6388/MAX6389)o V CC Reset Timeout (1120ms or 1200ms)/Manual Reset Timeout (140ms or 150ms) (MAX6390)o Negative-Going V CC Transient Immunity o Low Power Consumption of 6µA at +3.6V and 3µA at +1.8V o Pin Compatible withMAX809/MAX810/MAX803/MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348, and MAX6711/MAX6712/MAX6713o Tiny 3-Pin SC70 and 4-Pin SC70 PackagesMAX6381–MAX6390SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits________________________________________________________________Maxim Integrated Products1Pin Configurations19-1839; Rev 1; 04/01Ordering InformationOrdering Information continued at end of data sheet.Typical Operating Circuit appears at end of data sheet.Selector Guide appears at end of data sheet.Note:Insert reset threshold suffix (see Reset Threshold table)after "XR" or "XS". Insert reset timeout delay (see Reset Timeout Delay table) after "D" to complete the part number. Sample stock is generally held on standard versions only (seeStandard Versions table). Standard versions have an order increment requirement of 2500 pieces. Nonstandard versions have an order increment requirement of 10,000 pieces.Contact factory for availability of nonstandard versions.*MAX6390 is available with D4 or D7 timing only.For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .M A X 6381–M A X 6390SC70, Single/Dual Low-Voltage, Low-Power µP Reset CircuitsABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICSStresses 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 +6.0V RESET Open-Drain Output....................................-0.3V to +6.0V RESET , RESET (Push-Pull Output).............-0.3V to (V CC + 0.3V)MR , RESET IN.............................................-0.3V to (V CC + 0.3V)Input Current (V CC ).............................................................20mA Output Current (All Pins).....................................................20mAContinuous Power Dissipation (T A = +70°C)3-Pin SC70 (derate 2.9mW/°C above +70°C)........235mW 4-Pin SC70 (derate 3.1mW/°C above +70°C)........245mW Operating Temperature Range .........................-40°C to +125°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°CMAX6381–MAX6390SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits_______________________________________________________________________________________3M A X 6381–M A X 6390SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits 4______________________________________________________________________________________Typical Operating Characteristics(T A = +25°C, unless otherwise noted.)215436789-40-105-25203550658095110125SUPPLY CURRENT vs. TEMPERATURE(NO LOAD)TEMPERATURE (°C)S U P P L Y C U R R E N T (µA )25292735333137394143-40-105-25203550658095110125POWER-DOWN RESET DELAYvs. TEMPERATURETEMPERATURE (°C)P O W E R -D O W N R E S E T D E L A Y (µs )0.940.980.961.021.001.061.041.08-40-10520-253550658095110125NORMALIZED POWER-UP RESET TIMEOUTvs. TEMPERATUREM A X 6381/90 t o c 03TEMPERATURE (°C)N O R M A L I Z E D R E S E T T I M E O U T P E R I O D0.9900.9851.0150.9950.9901.0001.0051.0101.020-40-10520-253550958011065125M A X 6381/90 t o c 04TEMPERATURE (°C)N O R M A L I Z E D R E S E TT H R E S H O L D NORMALIZED RESET THRESHOLDvs. TEMPERATURE00.40.20.80.61.01.2063912OUTPUT VOLTAGE LOW vs. SINK CURRENTI SINK (mA)V O L (V )01.00.52.01.52.53.00500750250100012501500OUTPUT VOLTAGE HIGH vs. SOURCE CURRENTI SOURCE (µA)V O H (V )45001100010010MAXIMUM TRANSIENT DURATION vs. RESET COMPARATOR OVERDRIVE15050350250500200100400300RESET COMPARATOR OVERDRIVE, V TH - V CC (mV)M A X I M U M T R A N S I E N T D U R A T I O N (µs )3.53.93.74.54.34.14.74.95.35.15.5-40-105-25203550658095110125RESET IN TO RESET DELAYvs. TEMPERATUREM A X 6381/90 t o c 08TEMPERATURE (°C)R E S E T I N D E L A Y (µs )MAX6381–MAX6390SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits_______________________________________________________________________________________5M A X 6381–M A X 6390SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits 6_______________________________________________________________________________________Detailed DescriptionRESET OutputA µP 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 asserts when V CC is below the reset threshold;once V CC exceeds the reset threshold, an internal timer keeps the reset output asserted for the reset timeout period. After this interval, reset output deasserts. Reset output is guaranteed to be in the correct logic state for V CC ≥1V.Manual Reset Input (MAX6384/MAX6385/MAX6386/MAX6390)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 63k Ωpullup resistor (1.35k Ωfor MAX6390), so it can be left uncon-nected 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 G ND 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 environ-ment, connecting a 0.1µF capacitor from MR to G ND provides additional noise immunity.RESET IN Comparator(MAX6387/MAX6388/MAX6389)RESET IN is compared to an internal +1.27V reference.If the voltage at RESET IN is less than 1.27V, reset asserts. Use the RESET IN comparator as a user-adjustable reset detector or as a secondary power-sup-ply monitor by implementing a resistor-divider at RESET IN (shown in Figure 1). Reset asserts when either V CC or RESET IN falls below its respective threshold volt-age. Use the following equation to set the threshold:V INTH = V THRST (R1/R2 + 1)where V THRST = +1.27V. To simplify the resistor selec-tion, choose a value of R2 and calculate R1:R1 = R2 [(V INTH /V THRST ) - 1]Since the input current at RESET IN is 50nA (max),large values can be used for R2 with no significant loss in accuracy.___________Applications InformationNegative-Going V CC TransientsIn addition to issuing a reset to the µP during power-up,power-down, and brownout conditions, the MAX6381–MAX6390 are relatively immune to short dura-tion negative-going V CC transients (glitches).The Typical Operating Characteristics section shows the Maximum Transient Durations vs. Reset Comparator Overdrive, for which the MAX6381–MAX6390 do not generate a reset pulse. This graph was generated usinga negative-going pulse applied to V CC , starting above the actual reset threshold and ending below it by the magni-tude 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 transient increases (goes farther below the reset threshold), the maximum allowable pulse width decreases. A 0.1µF capacitor mounted as close as possible to V CC provides additional transient immunity.Ensuring a Valid RESET Output Down to V CC = 0The MAX6381–MAX6390 are guaranteed to operate properly down to V CC = 1V. In applications that require valid reset levels down to V CC = 0, a pulldown resistor to active-low outputs (push/pull only, Figure 2) and a pullup resistor to active-high outputs (push/pull only) will ensure that the reset line is valid while the reset output can no longer sink or source current. This scheme doesnot work with the open-drain outputs of the MAX6383/MAX6386/MAX6389/MAX6390. The resistor value used is not critical, but it must be small enough not to load the reset output when V CC is above the reset threshold. For most applications, 100k Ωis adequate.MAX6381–MAX6390SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits_______________________________________________________________________________________7M A X 6381–M A X 6390SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits 8Selector GuideChip InformationTRANSISTOR COUNT: 647PROCESS: BiCMOS*MR is for MAX6384/MAX6385/MAX6386/MAX6390**RESET IN is for MAX6387/MAX6388/MAX6389( ) are for MAX6382/MAX6385/MAX6388Pin Configurations (continued)MAX6381–MAX6390SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits_______________________________________________________________________________________9Ordering Information(continued)Note:Insert reset threshold suffix (see Reset Threshold table)after "XR" or "XS". Insert reset timeout delay (see Reset Timeout Delay table) after "D" to complete the part number. Sample stock is generally held on standard versions only (seeStandard Versions table). Standard versions have an order increment requirement of 2500 pieces. Nonstandard versions have an order increment requirement of 10,000 pieces.Contact factory for availability of nonstandard versions.*MAX6390 is available with D4 or D7 timing only.M A X 6381–M A X 6390SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits 10______________________________________________________________________________________Package InformationSC70, Single/Dual Low-Voltage, Low-Power µP Reset CircuitsMaxim 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____________________11©2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.MAX6381–MAX6390Package Information (continued)元器件交易网。