74系列数字芯片资料7420

©2000FairchildSemiconductorCorporationDS006355“X”totheorderingcode.ConnectionDiagramFunctionTableY=ABCDH=HIGHLogicLevelL=LOWLogicLevelX=EitherLOWorHIGHLogicLevelOrderNumberPackageNumberPackageDescriptionDM74LS20MM14A14-LeadSmallOutlineIntegratedCircuit(SOIC),JEDECMS-120,0.150NarrowDM74LS20NN14A14-LeadPlasticDual-In-LinePackage(PDIP),JEDECMS-001,0.300WideInputsOutputABCDYXXXLHXXLXHXLXXHLXXXHHHHHL(Note1)Note1:The“AbsoluteMaximumRatings”arethosevaluesbeyondwhichthesafetyofthedevicecannotbeguaranteed.Thedeviceshouldnotbeoperatedattheselimits.TheparametricvaluesdefinedintheElectricalCharacteristicstablesarenotguaranteedattheabsolutemaximumratings.The“RecommendedOperatingConditions”tablewilldefinetheconditionsforactualdeviceoperation.RecommendedOperatingConditionsElectricalCharacteristicsoverrecommendedoperatingfreeairtemperaturerange(unlessotherwisenoted)Note2:AlltypicalsareatVCC=5V,TA=25°C.Note3:Notmorethanoneoutputshouldbeshortedatatime,andthedurationshouldnotexceedonesecond.SwitchingCharacteristicsatVCC=5VandTA=25°CSupplyVoltage7VInputVoltage7VOperatingFreeAirTemperatureRange0°Cto+70°CStorageTemperatureRange-65°Cto+150°CSymbolParameterMinNomMaxUnitsVCCSupplyVoltage4.7555.25VVIHHIGHLevelInputVoltage2VVILLOWLevelInputVoltage0.8VIOHHIGHLevelOutputCurrent-0.4mAIOLLOWLevelOutputCurrent8mATAFreeAirOperatingTemperature070°CSymbolParameterConditionsMinTypMaxUnits(Note2)VIInputClampVoltageVCC=Min,II=-18mA-1.5VVOHHIGHLevelVCC=Min,IOH=Max,2.73.4VOutputVoltageVIL=MaxVOLLOWLevelVCC=Min,IOL=Max,0.350.5OutputVoltageVIH=MinVIOL=4mA,VCC=Min0.250.4IIInputCurrent@MaxInputVoltageVCC=Max,VI=7V0.1mAIIHHIGHLevelInputCurrentVCC=Max,VI=2.7V20μAIILLOWLevelInputCurrentVCC=Max,VI=0.4V-0.36mAIOSShortCircuitOutputCurrentVCC=Max(Note3)-20-100mAICCHSupplyCurrentwithOutputsHIGHVCC=Max0.40.8mAICCLSupplyCurrentwithOutputsLOWVCC=Max1.22.2mARL=2kΩSymbolParameterCL=15pFCL=50pFUnitsMinMaxMinMaxtPLHPropagationDelayTime310415nsLOW-to-HIGHLevelOutputtPHLPropagationDelayTime310415nsHIGH-to-LOWLevelOutput3(millimeters)unlessotherwisenoted14-LeadSmallOutlineIntegratedCircuit(SOIC),JEDECMS-120,0.150NarrowPackageNumberM14A(millimeters)unlessotherwisenoted(Continued)14-LeadPlasticDual-In-LinePackage(PDIP),JEDECMS-001,0.300WidePackageNumberN14AFairchilddoesnotassumeanyresponsibilityforuseofanycircuitrydescribed,nocircuitpatentlicensesareimpliedandFairchildreservestherightatanytimewithoutnoticetochangesaidcircuitryandspecifications.LIFESUPPORTPOLICYFAIRCHILD’SPRODUCTSARENOTAUTHORIZEDFORUSEASCRITICALCOMPONENTSINLIFESUPPORTDEVICESORSYSTEMSWITHOUTTHEEXPRESSWRITTENAPPROVALOFTHEPRESIDENTOFFAIRCHILDSEMICONDUCTORCORPORATION.Asusedherein:1.Lifesupportdevicesorsystemsaredevicesorsystemswhich,(a)areintendedforsurgicalimplantintothebody,or(b)supportorsustainlife,and(c)whosefailuretoperformwhenproperlyusedinaccordancewithinstructionsforuseprovidedinthelabeling,canberea-sonablyexpectedtoresultinasignificantinjurytotheuser.2.Acriticalcomponentinanycomponentofalifesupportdeviceorsystemwhosefailuretoperformcanberea-sonablyexpectedtocausethefailureofthelifesupportdeviceorsystem,ortoaffectitssafetyoreffectiveness.