74HC125中文资料

DATASHEETProductspecificationFileunderIntegratedCircuits,IC06December1990INTEGRATEDCIRCUITS74HC/HCT125Quadbuffer/linedriver;3-stateForacompletedatasheet,pleasealsodownload:•TheIC0674HC/HCT/HCU/HCMOSLogicFamilySpecifications•TheIC0674HC/HCT/HCU/HCMOSLogicPackageInformation•TheIC0674HC/HCT/HCU/HCMOSLogicPackageOutlinesDecember19902PhilipsSemiconductorsProductspecificationQuadbuffer/linedriver;3-state74HC/HCT125FEATURES•Outputcapability:busdriver•ICCcategory:MSIGENERALDESCRIPTIONThe74HC/HCT125arehigh-speedSi-gateCMOSdevicesandarepincompatiblewithlowpowerSchottkyTTL(LSTTL).TheyarespecifiedincompliancewithJEDECstandardno.7A.The74HC/HCT125arefournon-invertingbuffer/linedriverswith3-stateoutputs.The3-stateoutputs(nY)arecontrolledbytheoutputenableinput(nOE).AHIGHatnOEcausestheoutputstoassumeaHIGHimpedanceOFF-state.The“125”isidenticaltothe“126”buthasactiveLOWenableinputs.QUICKREFERENCEDATAGND=0V;Tamb=25°C;tr=tf=6nsNotes1.CPDisusedtodeterminethedynamicpowerdissipation(PDinμW):PD=CPD×VCC2×fi+∑(CL×VCC2×fo)where:fi=inputfrequencyinMHzfo=outputfrequencyinMHzCL=outputloadcapacitanceinpFVCC=supplyvoltageinV∑(CL×VCC2×fo)=sumofoutputs2.ForHCtheconditionisVI=GNDtoVCCForHCTtheconditionisVI=GNDtoVCC-1.5VORDERINGINFORMATIONSee“74HC/HCT/HCU/HCMOSLogicPackageInformation”.SYMBOLPARAMETERCONDITIONSTYPICALUNITHCHCTtPHL/tPLHpropagationdelaynAtonYCL=15pF;VCC=5V912nsCIinputcapacitance3.53.5pFCPDpowerdissipationcapacitanceperbuffernotes1and22224pFDecember19903PhilipsSemiconductorsProductspecificationQuadbuffer/linedriver;3-state74HC/HCT125PINDESCRIPTIONPINNO.SYMBOLNAMEANDFUNCTION1,4,10,131OEto4OEoutputsenableinputs(activeLOW)2,5,9,121Ato4Adatainputs3,6,8,111Yto4Ydataoutputs7GNDground(0V)14VCCpositivesupplyvoltageFig.1Pinconfiguration.Fig.2Logicsymbol.Fig.3IEClogicsymbol.(a)(b)Fig.4Functionaldiagram.Fig.5Logicdiagram(onebuffer).FUNCTIONTABLENote1.H=HIGHvoltagelevelL=LOWvoltagelevelX=don’tcareZ=highimpedanceOFF-stateINPUTSOUTPUTnOEnAnYLLHLHXLHZDecember19904PhilipsSemiconductorsProductspecificationQuadbuffer/linedriver;3-state74HC/HCT125DCCHARACTERISTICSFOR74HCFortheDCcharacteristicssee“74HC/HCT/HCU/HCMOSLogicFamilySpecifications”.Outputcapability:busdriverICCcategory:MSIACCHARACTERISTICSFOR74HCGND=0V;tr=tf=6ns;CL=50pFSYMBOLPARAMETERTamb(°C)UNITTESTCONDITIONS74HCVCC(V)WAVEFORMS+25-40to+85-40to+125min.typ.max.min.max.min.max.tPHL/tPLHpropagationdelaynAtonY30100125150ns2.0Fig.6112025304.591721266.0tPZH/tPZL3-stateoutputenabletimenOEtonY41125155190ns2.0Fig.7152531384.5122126326.0tPHZ/tPLZ3-stateoutputdisabletimenOEtonY41125155190ns2.0Fig.7152531384.5122126326.0tTHL/tTLHoutputtransitiontime14607590ns2.0Fig.651215184.541013156.0December19905PhilipsSemiconductorsProductspecificationQuadbuffer/linedriver;3-state74HC/HCT125DCCHARACTERISTICSFOR74HCTFortheDCcharacteristicssee“74HC/HCT/HCU/HCMOSLogicFamilySpecifications”.Outputcapability:busdriverICCcategory:MSINotetoHCTtypesThevalueofadditionalquiescentsupplycurrent(ΔICC)foraunitloadof1isgiveninthefamilyspecifications.TodetermineΔICCperinput,multiplythisvaluebytheunitloadcoefficientshowninthetablebelow.ACCHARACTERISTICSFOR74HCTGND=0V;tr=tf=6ns;CL=50pFINPUTUNITLOADCOEFFICIENTnA,nOE1.00SYMBOLPARAMETERTamb(°C)UNITTESTCONDITIONS74HCTVCC(V)WAVEFORMS+25-40to+85-40to+125min.typ.max.min.max.min.max.tPHL/tPLHpropagationdelaynAtonY15253138ns4.5Fig.6tPZH/tPZL3-stateoutputenabletimenOEtonY15283542ns4.5Fig.7tPHZ/tPLZ3-stateoutputdisabletimenOEtonY15253138ns4.5Fig.7tTHL/tTLHoutputtransitiontime5121518ns4.5Fig.6December19906PhilipsSemiconductorsProductspecificationQuadbuffer/linedriver;3-state74HC/HCT125ACWAVEFORMSPACKAGEOUTLINESSee“74HC/HCT/HCU/HCMOSLogicPackageOutlines”.Fig.6Waveformsshowingtheinput(nA)tooutput(nY)propagationdelaysandtheoutputtransitiontimes.(1)HC:VM=50%;VI=GNDtoVCC.HCT:VM=1.3V;VI=GNDto3V.Fig.7Waveformsshowingthe3-stateenableanddisabletimes.(1)HC:VM=50%;VI=GNDtoVCC.HCT:VM=1.3V;VI=GNDto3V.