M74HCT241资料

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M54HCT240/241/244M74HCT240/241/244

September1993HCT240:INVERTED-HCT241/244NONINVERTEDOCTALBUSBUFFERWITH3STATEOUTPUTS

B1R(PlasticPackage)

ORDERCODES:M54HCTXXXF1RM74HCTXXXM1RM74HCTXXXB1RM74HCTXXXC1RF1R(CeramicPackage)

M1R(MicroPackage)C1R(ChipCarrier)

PINCONNECTION(topview).

HIGHSPEEDtPD=13ns(TYP.)atVCC=5V.

LOWPOWERDISSIPATIONICC=4µA(MAX.)atTA=25oC.

COMPATIBLEWITHTTLOUTPUTSVIH=2V(MIN.)VIL=0.8V(MAX).

OUTPUTDRIVECAPABILITY15LSTTLLOADS.

SYMMETRICALOUTPUTIMPEDANCE|IOH|=IOL=6mA(MIN).

BALANCEDPROPAGATIONDELAYStPLH=tPHL.

PINANDFUNCTIONCOMPATIBLEWITH54/74LS240/241/244

DESCRIPTIONTheM54/74HCT240,HCT241andHCT244arehighspeedCMOSOCTALBUSBUFFERsfabricatedinsilicongateC2MOStechnology.TheyhavethesamehighspeedperformanceofLSTTLcombinedwithtrueCMOSlowpowerconsumption.Thedesignerhasachoiseofselectcombinationofinvertingandnon-invertingoutputs,symmetricalG(activelowoutputcontrol)input,andcomplementaryGandGinputs.EachcontrolinputgovernsfourBUSBUFFERs.Thisintegratedcircuithasinputandoutputcharacteristicsthatarefullycompatiblewith54/74LSTTLlogicfamilies.M54/74HCTdevicesaredesignedtodirectlyinterfaceHSC2MOSsystemswithTTLandNMOScomponents.TheyarealsopluginreplacementsforLSTTLdevicesgivingareductionofpowerconsumption.Thesedevicesaredesignedtobeusedwith3statememoryaddressdrivers,etc.Allinputsareequippedwithprotectioncircuitsagainststaticdischargeandtransientexcessvoltage.

HCT244HCT241HCT240

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CHIPCARRIER

INPUTANDOUTPUTEQUIVALENTCIRCUITPINDESCRIPTION(HCT240)

PINNoSYMBOLNAMEANDFUNCTION11GOutputEnableInput2,4,6,81A1to1A4DataInputs9,7,5,32Y1to2Y4DataOutputs11,13,15,172A1to2A4DataInputs

18,16,14,121Y1to1Y4DataOutputs

192GOutputEnabelInput10GNDGround(0V)20VCCPositiveSupplyVoltage

PINDESCRIPTION(HCT244)

PINNoSYMBOLNAMEANDFUNCTION11GOutputEnableInput2,4,6,81A1to1A4DataInputs9,7,5,32Y1to2Y4DataOutputs11,13,15,172A1to2A4DataInputs

18,16,14,121Y1to1Y4DataOutputs

192GOutputEnabelInput10GNDGround(0V)20VCCPositiveSupplyVoltagePINDESCRIPTION(HCT241)

PINNoSYMBOLNAMEANDFUNCTION11GOutputEnableInput2,4,6,81A1to1A4DataInputs9,7,5,32Y1to2Y4DataOutputs11,13,15,172A1to2A4DataInputs

18,16,14,121Y1to1Y4DataOutputs

192GOutputEnabelInput10GNDGround(0V)20VCCPositiveSupplyVoltageHCT244HCT241HCT240M54/M74HCT240/241/244

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IECLOGICSYMBOLS

TRUTHTABLE

INPUTOUTPUTGG(HCT241)AnYn(HCT240)Yn(HCT241)Yn(HCT244)LHLHLLLHHLHHHLXZZZX:”H”or”L”Z:Highimpedance

CIRCUITSCHEMATIC(1/8PACKAGE)HCT244HCT241HCT240

HCT240HCT241/244M54/M74HCT240/241/244

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ABSOLUTEMAXIMUMRATINGS

SymbolParameterValueUnitVCCSupplyVoltage-0.5to+7VVIDCInputVoltage-0.5toVCC+0.5VVODCOutputVoltage-0.5toVCC+0.5VIIKDCInputDiodeCurrent±20mAIOKDCOutputDiodeCurrent±20mAIODCOutputSourceSinkCurrentPerOutputPin±35mAICCorIGNDDCVCCorGroundCurrent±70mAPDPowerDissipation500(*)mWTstgStorageTemperature-65to+150oCTLLeadTemperature(10sec)300oCAbsoluteMaximumRatingsarethosevaluesbeyondwhichdamagetothedevicemayoccur.Functionaloperationundertheseconditionisnotimplied.(*)500mW:≅65oCderateto300mWby10mW/oC:65oCto85oC

RECOMMENDEDOPERATINGCONDITIONS

SymbolParameterValueUnitVCCSupplyVoltage4.5to5.5VVIInputVoltage0toVCCVVOOutputVoltage0toVCCVTopOperatingTemperature:M54HCSeriesM74HCSeries-55to+125-40to+85oCoCtr,tfInputRiseandFallTime(VCC=4.5to5.5V)0to500nsM54/M74HCT240/241/244

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DCSPECIFICATIONS

SymbolParameterTestConditionsValueUnitVCC(V)TA=25oC54HCand74HC-40to85oC74HC-55to125oC54HCMin.Typ.Max.Min.Max.Min.Max.VIHHighLevelInputVoltage4.5to5.52.02.02.0V

VILLowLevelInputVoltage4.5to5.50.80.80.8V

VOHHighLevelOutputVoltage4.5VI=VIHorVILIO=-20µA4.44.54.44.4VIO=-6.0mA4.184.314.134.10

VOLLowLevelOutputVoltage4.5VI=VIHorVILIO=20µA0.00.10.10.1VIO=6.0mA0.170.260.330.4

IIInputLeakageCurrent5.5VI=VCCorGND±0.1±1±1µA

ICCQuiescentSupplyCurrent5.5VI=VCCorGND44080µA

∆ICCAdditionalworstcasesupplycurrent5.5PerInputpinVI=0.5Vor2.4VOtherInputsatVCCorGND2.02.93.0mAM54/M74HCT240/241/244

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ACELECTRICALCHARACTERISTICS(CL=50pF,Inputtr=tf=6ns)

SymbolParameterTestConditionsValueUnitVCC(V)CL(pF)TA=25oC54HCand74HC-40to85oC74HC-55to125oC54HCMin.Typ.Max.Min.Max.Min.Max.tTLHtTHLOutputTransitionTime4.5507121518ns

tPLHtPHLPropagationDelayTime4.55015222833ns4.515021303845nstPLHtPHLPropagationDelayTime4.55015253138ns4.515021334150nstPZLtPZHOutputEnableTime4.550RL=1KΩ17303845ns4.5150RL=1KΩ23384857nstPLZtPHZOutputDisableTime4.550RL=1KΩ16303845ns

CINInputCapacitance5101010pFCOUTOutputCapacitance10pF

CPD(*)PowerDissipationCapacitanceHCT240HCT241/2443331pF(*)CPDisdefinedasthevalueoftheIC’sinternalequivalentcapacitancewhichiscalculatedfromtheoperatingcurrentconsumptionwithoutload.(RefertoTestCircuit).Averageopertingcurrentcanbeobtainedbythefollowingequation.ICC(opr)=CPD•VCC•fIN+ICC/8(percircuit)