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74HC138.pdf

74HC138

信五
2011-04-24 0人阅读 举报 0 0 暂无简介

简介:本文档为《74HC138pdf》,可适用于IT/计算机领域

TLFMMHCMMHCtoLineDecoderJanuaryMMHCMMHCtoLineDecoderGeneralDescriptionThisdecoderutilizesadvancedsilicongateCMOStechnology,andiswellsuitedtomemoryaddressdecodingordataroutingapplicationsThecircuitfeatureshighnoiseimmunityandlowpowerconsumptionusuallyassociatedwithCMOScircuitry,yethasspeedscomparabletolowpowerSchottkyTTLlogicTheMMHCMMHChasbinaryselectinputs(A,B,andC)IfthedeviceisenabledtheseinputsdeterminewhichoneoftheeightnormallyhighoutputswillgolowTwoactivelowandoneactivehighenables(G,GAandGB)areprovidedtoeasethecascadingofdecodersThedecoder’soutputscandrivelowpowerSchottkyTTLequivalentloads,andarefunctionallyandpinequivalenttotheLSLSAllinputsareprotectedfromdamageduetostaticdischargebydiodestoVCCandgroundFeaturesYTypicalpropagationdelay:nsYWidepowersupplyrange:V–VYLowquiescentcurrent:mAmaximum(HCSeries)YLowinputcurrent:mAmaximumYFanoutofLSTTLloadsConnectionandLogicDiagramsDualInLinePackageTLF–OrderNumberMMHCorMMHCTruthTableInputsOutputsEnableSelectGG*CBAYYYYYYYYXHXXXHHHHHHHHLXXXXHHHHHHHHHLLLLLHHHHHHHHLLLHHLHHHHHHHLLHLHHLHHHHHHLLHHHHHLHHHHHLHLLHHHHLHHHHLHLHHHHHHLHHHLHHLHHHHHHLHHLHHHHHHHHHHL*GeGAaGBHehighlevel,Lelowlevel,Xedon’tcareTLF–CNationalSemiconductorCorporationRRDBMPrintedinUSAAbsoluteMaximumRatings(Notes)IfMilitaryAerospacespecifieddevicesarerequired,pleasecontacttheNationalSemiconductorSalesOfficeDistributorsforavailabilityandspecificationsSupplyVoltage(VCC)btoaVDCInputVoltage(VIN)btoVCCaVDCOutputVoltage(VOUT)btoVCCaVClampDiodeCurrent(IIK,IOK)gmADCOutputCurrent,perpin(IOUT)gmADCVCCorGNDCurrent,perpin(ICC)gmAStorageTemperatureRange(TSTG)b§Ctoa§CPowerDissipation(PD)(Note)mWSOPackageonlymWLeadTemp(TL)(Solderingseconds)§COperatingConditionsMinMaxUnitsSupplyVoltage(VCC)VDCInputorOutputVoltageVCCV(VIN,VOUT)OperatingTempRange(TA)MMHCba§CMMHCba§CInputRiseorFallTimesVCCeV(tr,tf)nsVCCeVnsVCCeVnsDCElectricalCharacteristics(Note)TAe§CHCHCSymbolParameterConditionsVCCTAebto§CTAebto§CUnitsTypGuaranteedLimitsVIHMinimumHighLevelVVInputVoltageVVVVVILMaximumLowLevelVVInputVoltage**VVVVVOHMinimumHighLevelVINeVIHorVILOutputVoltagelIOUTlsmAVVVVVVVINeVIHorVILlIOUTlsmAVVlIOUTlsmAVVVOLMaximumLowLevelVINeVIHorVILOutputVoltagelIOUTlsmAVVVVVVVINeVIHorVILlIOUTlsmAVVlIOUTlsmAVVIINMaximumInputVINeVCCorGNDVgggmACurrentICCMaximumQuiescentVINeVCCorGNDVmASupplyCurrentIOUTemANote:AbsoluteMaximumRatingsarethosevaluesbeyondwhichdamagetothedevicemayoccurNote:UnlessotherwisespecifiedallvoltagesarereferencedtogroundNote:PowerDissipationtemperaturederatingÐplastic‘‘N’’package:bmW§Cfrom§Cto§Cceramic‘‘J’’package:bmW§Cfrom§Cto§CNote:ForapowersupplyofVgtheworstcaseoutputvoltages(VOH,andVOL)occurforHCatVThustheVvaluesshouldbeusedwhendesigningwiththissupplyWorstcaseVIHandVILoccuratVCCeVandVrespectively(TheVIHvalueatVisV)Theworstcaseleakagecurrent(IIN,ICC,andIOZ)occurforCMOSatthehighervoltageandsotheVvaluesshouldbeused**VILlimitsarecurrentlytestedatofVCCTheaboveVILspecification(ofVCC)willbeimplementednolaterthanQ,CY’ACElectricalCharacteristicsVCCeV,TAe§C,CLepF,tretfensSymbolParameterConditionsTypGuaranteedUnitsLimittPLHMaximumPropagationnsDelay,BinarySelecttoanyOutputtPHLMaximumPropagationnsDelay,BinarySelecttoanyOutputtPHL,tPLHMaximumPropagationnsDelay,GtoanyOutputtPHLMaximumPropagationnsDelayGAorGBtoOutputtPLHMaximumPropagationnsDelayGAorGBtoOutputACElectricalCharacteristicsCLepF,tretfens(unlessotherwisespecified)TAe§CHCHCSymbolParameterConditionsVCCTAebto§CTAebto§CUnitsTypGuaranteedLimitstPLHMaximumPropagationVnsDelayBinarySelecttoVnsanyOutputLowtoHighVnstPHLMaximumPropagationVnsDelayBinarySelecttoanyVnsOutputHightoLowVnstPHL,tPLHMaximumPropagationVnsDelayGtoanyVnsOutputVnstPHLMaximumPropagationVnsDelayGAorGBtoVnsOutputVnstPLHMaximumPropagationVnsDelayGAorGBtoVnsOutputVnstTLH,tTHLOutputRiseandVnsFallTimeVnsVnsCINMaximumInputpFCapacitanceCPDPowerDissipation(Note)pFCapacitanceNote:CPDdeterminesthenoloaddynamicpowerconsumption,PDeCPDVCCfaICCVCC,andthenoloaddynamiccurrentconsumption,ISeCPDVCCfaICCMMHCMMHCtoLineDecoderPhysicalDimensionsinches(millimeters)OrderNumberMMHCJorMMHCJNSPackageNumberJAOrderNumberMMHCNNSPackageNumberNELIFESUPPORTPOLICYNATIONAL’SPRODUCTSARENOTAUTHORIZEDFORUSEASCRITICALCOMPONENTSINLIFESUPPORTDEVICESORSYSTEMSWITHOUTTHEEXPRESSWRITTENAPPROVALOFTHEPRESIDENTOFNATIONALSEMICONDUCTORCORPORATIONAsusedherein:LifesupportdevicesorsystemsaredevicesorAcriticalcomponentisanycomponentofalifesystemswhich,(a)areintendedforsurgicalimplantsupportdeviceorsystemwhosefailuretoperformcanintothebody,or(b)supportorsustainlife,andwhosebereasonablyexpectedtocausethefailureofthelifefailuretoperform,whenproperlyusedinaccordancesupportdeviceorsystem,ortoaffectitssafetyorwithinstructionsforuseprovidedinthelabeling,caneffectivenessbereasonablyexpectedtoresultinasignificantinjurytotheuserNationalSemiconductorNationalSemiconductorNationalSemiconductorNationalSemiconductorCorporationEuropeHongKongLtdJapanLtdWestBardinRoadFax:(a)thFloor,StraightBlock,Tel:Arlington,TXEmail:cnjwgetevmnsccomOceanCentre,CantonRdFax:Tel:()DeutschTel:(a)Tsimshatsui,KowloonFax:()EnglishTel:(a)HongKongFranaisTel:(a)Tel:()ItalianoTel:(a)Fax:()Nationaldoesnotassumeanyresponsibilityforuseofanycircuitrydescribed,nocircuitpatentlicensesareimpliedandNationalreservestherightatanytimewithoutnoticetochangesaidcircuitryandspecifications

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