芯片资料74HC138

SN54HC138,SN74HC1383-LINETO8-LINEDECODERS/DEMULTIPLEXERSSCLS107C–DECEMBER1982–REVISEDMAY19971POSTOFFICEBOX655303•DALLAS,TEXAS75265DesignedSpecificallyforHigh-SpeedMemoryDecodersandDataTransmissionSystemsIncorporateThreeEnableInputstoSimplifyCascadingand/orDataReceptionPackageOptionsIncludePlasticSmall-Outline(D),ThinShrinkSmall-Outline(PW),andCeramicFlat(W)Packages,CeramicChipCarriers(FK),andStandardPlastic(N)andCeramic(J)300-milDIPsdescriptionThe’HC138aredesignedtobeusedinhigh-performancememory-decodingordata-routingapplicationsrequiringveryshortpropagationdelaytimes.Inhigh-performancememorysystems,thesedecoderscanbeusedtominimizetheeffectsofsystemdecoding.Whenemployedwithhigh-speedmemoriesutilizingafastenablecircuit,thedelaytimesofthesedecodersandtheenabletimeofthememoryareusuallylessthanthetypicalaccesstimeofthememory.Thismeansthattheeffectivesystemdelayintroducedbythedecodersisnegligible.Theconditionsatthebinary-selectinputsatthethreeenableinputsselectoneofeightoutputlines.Twoactive-lowandoneactive-highenableinputsreducetheneedforexternalgatesorinverterswhenexpanding.A24-linedecodercanbeimplementedwithoutexternalinvertersanda32-linedecoderrequiresonlyoneinverter.Anenableinputcanbeusedasadatainputfordemultiplexingapplications.TheSN54HC138ischaracterizedforoperationoverthefullmilitarytemperaturerangeof–55°Cto125°C.TheSN74HC138ischaracterizedforoperationfrom–40°Cto85°C.3212019910111213456781817161514Y1Y2NCY3Y4CG2ANCG2BG1BANCY6Y5VY0Y7GNDNCSN54HC138...FKPACKAGE(TOPVIEW)CCNC–Nointernalconnection12345678161514131211109ABCG2AG2BG1Y7GNDVCCY0Y1Y2Y3Y4Y5Y6SN54HC138...JORWPACKAGESN74HC138...D,N,ORPWPACKAGE(TOPVIEW)Copyright1997,TexasInstrumentsIncorporatedPleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.PRODUCTIONDATAinformationiscurrentasofpublicationdate.ProductsconformtospecificationsperthetermsofTexasInstrumentsstandardwarranty.Productionprocessingdoesnotnecessarilyincludetestingofallparameters.SN54HC138,SN74HC1383-LINETO8-LINEDECODERS/DEMULTIPLEXERSSCLS107C–DECEMBER1982–REVISEDMAY19972POSTOFFICEBOX655303•DALLAS,TEXAS75265FUNCTIONTABLEINPUTSOUTPUTSENABLESELECTOUTPUTSG1G2AG2BCBAY0Y1Y2Y3Y4Y5Y6Y7XHXXXXHHHHHHHHXXHXXXHHHHHHHHLXXXXXHHHHHHHHHLLLLLLHHHHHHHHLLLLHHLHHHHHHHLLLHLHHLHHHHHHLLLHHHHHLHHHHHLLHLLHHHHLHHHHLLHLHHHHHHLHHHLLHHLHHHHHHLHHLLHHHHHHHHHHLlogicsymbols(alternatives)†11AY015022B43CY1141Y2132Y3123Y4114Y5105Y696Y777BIN/OCT645G1G2AG2B&EN01AY01502B23CY1141Y2132Y3123Y4114Y5105Y696Y777DMUX645G1G2AG2B&G07†ThesesymbolsareinaccordancewithANSI/IEEEStd91-1984andIECPublication617-12.PinnumbersshownarefortheD,J,N,PW,andWpackages.SN54HC138,SN74HC1383-LINETO8-LINEDECODERS/DEMULTIPLEXERSSCLS107C–DECEMBER1982–REVISEDMAY19973POSTOFFICEBOX655303•DALLAS,TEXAS75265logicdiagram(positivelogic)AY0Y1Y2Y3Y4Y5Y6Y7BCG1G2AG2BPinnumbersshownarefortheD,J,N,PW,andWpackages.12364515141312111097absolutemaximumratingsoveroperatingfree-airtemperaturerange†Supplyvoltagerange,VCC–0.5Vto7V..........................................................Inputclampcurrent,IIK(VI0orVIVCC)(seeNote1)±20mA....................................Outputclampcurrent,IOK(VO0orVOVCC)(seeNote1)±20mA................................Continuousoutputcurrent,IO(VO=0toVCC)±25mA..............................................ContinuouscurrentthroughVCCorGND±50mA...................................................Packagethermalimpedance,qJA(seeNote2):Dpackage113°C/W..................................Npackage78°C/W...................................PWpackage149°C/W................................Storagetemperaturerange,Tstg–65°Cto150°C...................................................†Stressesbeyondthoselistedunder“absolutemaximumratings”maycausepermanentdamagetothedevice.Thesearestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunder“recommendedoperatingconditions”isnotimplied.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmayaffectdevicereliability.NOTES:1.Theinputandoutputvoltageratingsmaybeexceedediftheinputandoutputcurrentratingsareobserved.2.ThepackagethermalimpedanceiscalculatedinaccordancewithJESD51,exceptforthrough-holepackages,whichuseatracelengthofzero.SN54HC138,SN74HC1383-LINETO8-LINEDECODERS/DEMULTIPLEXERSSCLS107C–DECEMBER1982–REVISEDMAY19974POSTOFFICEBOX655303•DALLAS,TEXAS75265recommendedoperatingconditionsSN54HC138SN74HC138UNITMINNOMMAXMINNOMMAXUNITVCCSupplyvoltage256256VVCC=2V1.51.5VIHHigh-levelinputvoltageVCC=4.5V3.153.15VVCC=6V4.24.2VCC=2V00.500.5VILLow-levelinputvoltageVCC=4.5V01.3501.35VVCC=6V01.801.8VIInputvoltage0VCC0VCCVVOOutputvoltage0VCC0VCCVVCC=2V0100001000ttInputtransition(riseandfall)timeVCC=4.5V05000500nsVCC=6V04000400TAOperatingfree-airtemperature–55125–4085°Celectricalcharacteristicsoverrecommendedoperatingfree-airtemperaturerange(unlessotherwisenoted)PARAMETERTESTCONDITIONSVCCTA=25°CSN54HC138SN74HC138UNITPARAMETERTESTCONDITIONSVCCMINTYPMAXMI