如果您无法下载资料，请参考说明：
1、部分资料下载需要金币，请确保您的账户上有足够的金币
2、已购买过的文档，再次下载不重复扣费
3、资料包下载后请先用软件解压，在使用对应软件打开
MM54HC123A/MM74HC123ADualRetriggerableMonostableMultivibratorJanuary1988MM54HC123A/MM74HC123ADualRetriggerableMonostableMultivibratorGeneralDescriptionTheMM54/74HC123Ahighspeedmonostablemultivibra-putpulseequationissimply:PWe(REXT)(CEXT);wherePWtors(oneshots)utilizeadvancedsilicon-gateCMOStech-isinseconds,Risinohms,andCisinfarads.Allinputsarenology.TheyfeaturespeedscomparabletolowpowerprotectedfromdamageduetostaticdischargebydiodestoSchottkyTTLcircuitrywhileretainingthelowpowerandVCCandground.highnoiseimmunitycharacteristicofCMOScircuits.Eachmultivibratorfeaturesbothanegative,A,andaposi-Featurestive,B,transitiontriggeredinput,eitherofwhichcanbeYTypicalpropagationdelay:25nsusedasaninhibitinput.AlsoincludedisaclearinputthatYWidepowersupplyrange:2V±6Vwhentakenlowresetstheoneshot.The'HC123canbeYLowquiescentcurrent:80mAmaximum(74HCSeries)triggeredonthepositivetransitionoftheclearwhileAisYLowinputcurrent:1mAmaximumheldlowandBisheldhigh.YFanoutof10LS-TTLloadsThe'HC123Aisretriggerable.ThatisitmaybetriggeredYSimplepulsewidthformulaTeRCrepeatedlywhiletheiroutputsaregeneratingapulseandYWidepulserange:400nsto(typ)thepulsewillbeextended.%YParttopartvariation:5%(typ)PulsewidthstabilityoverawiderangeoftemperatureandgYSchmittTriggerA&BinputsenableinfinitesignalinputsupplyisachievedusinglinearCMOStechniques.Theout-riseandfalltimes.ConnectionDiagramDual-In-LinePackageTimingComponentNote:Pin6andPin14mustbehard-wiredtoGND.TL/F/5206±2TL/F/5206±1TopViewOrderNumberMM54HC123AorMM74HC123ATruthTableInputsOutputsHeHighLevelLeLowLevelClearABQQueTransitionfromLowtoHighLXXLHveTransitionfromHightoLowXHXLHÉeOneHighLevelPulseOneLowLevelPulseXXLLHßeXeIrrelevantHLuÉßHvHÉßuLHÉßC1995NationalSemiconductorCorporationTL/F/5206RRD-B30M105/PrintedinU.S.A.AbsoluteMaximumRatings(Notes1&2)OperatingConditionsIfMilitary/Aerospacespecifieddevicesarerequired,MinMaxUnitspleasecontacttheNationalSemiconductorSalesSupplyVoltage(VCC)26VOffice/Distributorsf
立即下载
