SN74HCT373中文资料

SN54HCT373,SN74HCT373OCTALTRANSPARENTD-TYPELATCHESWITH3-STATEOUTPUTSSCLS009D–MARCH1984–REVISEDAUGUST20031POSTOFFICEBOX655303•DALLAS,TEXAS75265OperatingVoltageRangeof4.5Vto5.5VHigh-Current3-StateTrueOutputsCanDriveUpTo15LSTTLLoadsLowPowerConsumption,80-µAMaxICCTypicaltpd=21ns±6-mAOutputDriveat5VLowInputCurrentof1µAMaxInputsAreTTL-VoltageCompatibleEightHigh-CurrentLatchesinaSinglePackageFullParallelAccessforLoadingdescription/orderinginformationThese8-bitlatchesfeature3-stateoutputsdesignedspecificallyfordrivinghighlycapacitiveorrelativelylow-impedanceloads.Theyareparticularlysuitableforimplementingbufferregisters,I/Oports,bidirectionalbusdrivers,andworkingregisters.Theeightlatchesofthe’HCT373devicesaretransparentD-typelatches.Whilethelatch-enable(LE)inputishigh,theQoutputsfollowthedata(D)inputs.WhenLEistakenlow,theQoutputsarelatchedatthelevelsthatweresetupattheDinputs.ORDERINGINFORMATIONTAPACKAGE†ORDERABLEPARTNUMBERTOP-SIDEMARKING–40Cto85CPDIP–NTubeof20SN74HCT373NSN74HCT373N–40Cto85CSOIC–DWTubeof25SN74HCT373DWHCT373–40Cto85CSOIC–DWReelof2000SN74HCT373DWRHCT373–40°Cto85°CSOP–NSReelof2000SN74HCT373NSRHCT373–40°Cto85°CSSOP–DBReelof2000SN74HCT373DBRHT373TSSOP–PWTubeof70SN74HCT373PWHT373TSSOP–PWReelof2000SN74HCT373PWRHT373Reelof250SN74HCT373PWT–55Cto125CCDIP–JTubeof20SNJ54HCT373JSNJ54HCT373J–55°Cto125°CCFP–WTubeof85SNJ54HCT373WSNJ54HCT373WLCCC–FKTubeof55SNJ54HCT373FKSNJ54HCT373FK†Packagedrawings,standardpackingquantities,thermaldata,symbolization,andPCBdesignguidelinesareavailableat(TOPVIEW)CCSN54HCT373...JORWPACKAGESN74HCT373...DB,DW,N,NS,ORPWPACKAGE(TOPVIEW)1234567891020191817161514131211OE1Q1D2D2Q3Q3D4D4QGNDVCC8Q8D7D7Q6Q6D5D5QLECopyright2003,TexasInstrumentsIncorporatedPleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.PRODUCTIONDATAinformationiscurrentasofpublicationdate.ProductsconformtospecificationsperthetermsofTexasInstrumentsstandardwarranty.Productionprocessingdoesnotnecessarilyincludetestingofallparameters.OnproductscomplianttoMIL-PRF-38535,allparametersaretestedunlessotherwisenoted.Onallotherproducts,productionprocessingdoesnotnecessarilyincludetestingofallparameters.SN54HCT373,SN74HCT373OCTALTRANSPARENTD-TYPELATCHESWITH3-STATEOUTPUTSSCLS009D–MARCH1984–REVISEDAUGUST20032POSTOFFICEBOX655303•DALLAS,TEXAS75265description/orderinginformation(continued)Anoutput-enable(OE)inputplacestheeightoutputsineitheranormallogicstate(highorlowlogiclevels)orthehigh-impedancestate.Inthehigh-impedancestate,theoutputsneitherloadnordrivethebuslinessignificantly.Thehigh-impedancestateandincreaseddriveprovidethecapabilitytodrivebuslineswithoutinterfaceorpullupcomponents.OEdoesnotaffecttheinternaloperationsofthelatches.Olddatacanberetainedornewdatacanbeenteredwhiletheoutputsareoff.FUNCTIONTABLE(eachlatch)INPUTSOUTPUTOELEDOUTPUTQLHHHLHLLLLXQ0HXXZlogicdiagram(positivelogic)OEToSevenOtherChannels11132LE1DC11D1Qabsolutemaximumratingsoveroperatingfree-airtemperaturerange(unlessotherwisenoted)†Supplyvoltagerange,VCC–0.5Vto7V..........................................................Inputclampcurrent,IIK(VI0orVIVCC)(seeNote1)±20mA....................................Outputclampcurrent,IOK(VO0orVOVCC)(seeNote1)±20mA................................Continuousoutputcurrent,IO(VO=0toVCC)±35mA..............................................ContinuouscurrentthroughVCCorGND±70mA...................................................Packagethermalimpedance,θJA(seeNote2):DBpackage70°C/W.................................DWpackage58°C/W.................................Npackage69°C/W...................................NSpackage60°C/W.................................PWpackage83°C/W.................................Storagetemperaturerange,Tstg–65°Cto150°C...................................................†Stressesbeyondthoselistedunder“absolutemaximumratings”maycausepermanentdamagetothedevice.Thesearestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunder“recommendedoperatingconditions”isnotimplied.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmayaffectdevicereliability.NOTES:1.Theinputandoutputvoltageratingsmaybeexceedediftheinputandoutputcurrentratingsareobserved.2.ThepackagethermalimpedanceiscalculatedinaccordancewithJESD51-7.SN54HCT373,SN74HCT373OCTALTRANSPARENTD-TYPELATCHESWITH3-STATEOUTPUTSSCLS009D–MARCH1984–REVISEDAUGUST20033POSTOFFICEBOX655303•DALLAS,TEXAS75265recommendedoperatingconditions(seeNote3)SN54HCT373SN74HCT373UNITMINNOMMAXMINNOMMAXUNITVCCSupplyvoltage4.555.54.555.5VVIHHigh-levelinputvoltageVCC=4.5Vto5.5V22VVILLow-levelinputvoltageVCC=4.5Vto5.5V0.80.8VVIInputvoltage0VCC0VCCVVOOutputvoltage0VCC0VCCV∆t/∆vInputtransitionrise/falltime500500nsTAOperatingfree-airtemperature–55125–4085°CNOTE3:Allunusedinputsofthedevicemus