常用芯片资料——LM293D

I•600-mA OutputCurrent CapabilityPer NEPACKAGETOP VIEWIDriverI•Pulsed Current

1.2-A PerDriver1°161,2EN[J VCC1I•Output ClampDiodes forInductive Transient215]4A1A[Suppression3141Y[]4Y•Wide SupplyVoltage Range

4.5V to36V413HEATSINK AND]I HEATSINKAND512•Separate Input-Logic SupplyGROUND]f GROUND611•Thermal Shutdown2Y

[710]3Y•Internal ESDProtection2A[]3A89VCC2[]3,4EN•High-Noise-Immunity Inputs•Functional Replacementfor SGSL293D logicsymbol1description tThis symbolis inaccordance withANSI/IEEE Std91-1984and IECPublication617-

12.The L293D is a quadruplehigh-current half-H driverlogic diagramdesigned to providebidirectional drivecurrents ofup21A—to600-mA atvoltages from

4.5V to36V Itis11,2EN一designedtodrive inductiveloads suchas relays,72A—solenoids,de andbipolar steppingmotors,as wellasother high-current/high-voltage loadsin103Apositive-supply applications.93,4ENAll inputsare TTL-compatible.Each outputisa154Acomplete totem-pole drivecircuit witha Darlingtontransistorsink anda pseudo-Darlington source.Drivers areenabled inpairs withdrivers1and2FUNCTION TABLEeach driverenabledby1,2EN anddrivers3and4enabled byINPUTStOUTPUTY3,4EN.When anenable inputis high,the associatedAENdrivers areenabled,and theiroutputs areactive andinphase with their inputs.External high-speed HH HLH Loutputclamp diodesshould beused forinductiveX LZtransient suppression.When theenable inputis low,H=high-level,L=low level,those driversare disabled,and theiroutputs areoffX=irrelevant,Z=high-impedance offt Intheand ina high-impedance state.With theproper datathermalshutdown mode,the outputis intheinputs,each pairof driversform afull-H orbridge high-impedance stateregardless ofthe inputreversibledrive suitablefor solenoidor motorlevels.applications.A Vcciterminal,separate fromVcc2,is providedforthe logicinputs to minimize devicepowerdissipation.The L293D isdesigned foroperation from0℃to70℃.PRODUCTION DATAinformation iscurrent asof publicationdate.Copyright1990,Texas InstrumentsIncorporatedProductsconformtospecificationsperthetermsofTexasInstrumentsstandard warranty.Production processingdoes notnecessarilyincludetestingofallparameters.2Y3Y4Yschematics ofinputs andoutputsabsolute maximumratings overoperating free-air temperaturerange unlessotherwise notedLogic supply voltage range,Vcci see Note

1.All voltagevalues arewith respectto thenetwork groundterminal.℃℃

2.For operationabove25free-air temperature,derate linearlyat therate of

16.6mW/.℃℃

3.Foroperationabove25case temperature,derate linearlyat therate of

71.4mW/.Duetovariationsinindividualdeviceelectricalcharacteristics andthermal resistance,the built-in thermaloverload protectionmay beactivated atpower levelsslightly aboveorbelow therated dissipation.recommended operatingconditionsMIN MAXUNITLogic supplyvoltage,V

4.57VOutput supplyvoltage,VcC136VVCC17V23VcciHigh-level inputvoltage,V|H V

2.37VCC1N7V-

0.3t1,5Low-level inputvoltage,V||_VOperating free-air temperature,T/\°70℃t Thealgebraic convention,in whichthe leastpositive mostnegative valueis designatedminimum,is usedin thisdata sheetfor logicvoltage levels.electrical characteristics,Vcci=5V VcC2=24V TA=25℃PARAMETER TESTCONDITIONS MINTYP MAXUNITVQH High-level outputvoltage|QH=-

0.6A VCC2-L8VCC2-1-4VVQL Low-level outputvoltageIOL=06A

1.

21.8VV+

1.3VVoKH High-level outputclamp voltagelOK6A二-・VQKL Low-level outputclamp voltagelOK=--6A“q.3VA

0.2100I High-level inputcurrent V|=7V MAEN

0.2±10IHA-3-10I Low-level inputcurrent V|=0MAEN-2-100ILAll outputsat highlevel1322All outputsat lowlevel3560ICC1Logicsupplycurrent I=00mAAll outputsat highimpedance824All outputsat highlevel1424All outputsat lowlevel26CC2Output supplycurrent I=00mAAll outputsat highimpedance24switching characteristics,Vcci=5V VcC2=24V TA=25℃PARAMETER TESTCONDITIONS MINTYP MAXUNITtp[_H Propagationdelay time,low-to-high-level outputfrom Ainput800nstPHL Propagationdelay time,high-to-low-level outputfrom Ainput400nsCL二30pF,See Figure1tTLH Transitiontime,low-to-high-level output300nstfHL Transitiontime,high-to-low-level output300nsTEST CIRCUITPARAMETERMEASUREMENT INFORMATIONNOTES:A.The pulsegenerator hasthe followingcharacteristics:t10ns,tf10ns,t=10ps,PRR=5kHz,ZQ=50Q.B.C|_includes probeandr wjigcapacitance.Figure

1.Test Circuitand VoltageWaveformsAPPLICATION INFORMATIONInput5V24VInputFigure

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