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)