硬件电路设计与电子工艺基础（第2版） 集成芯片汇总 课件 第4章 3线-8线二进制译码器-74hc138 --- 同步加计数器-74hc160、74hc161.pdf

CD54/74HC138,CD54/74HCT138,

CD54/74HC238,CD54/74HCT238

DatasheetacquiredfromHarrisSemiconductor

SCHS147IHigh-SpeedCMOSLogic3-to8-LineDecoder/

October1997-RevisedAugust2004DemultiplexerInvertingandNoninverting

FeaturesOrderingInformation

•SelectOneOfEightDataOutputs

TEMP.RANGE

ActiveLowfor138,ActiveHighfor238o

[/TitlePARTNUMBER(C)PACKAGE

•l/OPortorMemorySelector

(CD74CD54HC138F3A-55to12516LdCERDIP

HC138•ThreeEnableInputstoSimplifyCascadingCD54HC238F3A-55to12516LdCERDIP

•TypicalPropagationDelayof13nsatV=5V,

,

CC

CD74CL=15pF,TA=25oCCD54HCT138F3A-55to12516LdCERDIP

HCT13•Fanout(OverTemperatureRange)CD54HCT238F3A-55to12516LdCERDIP

8,-StandardOutputs...............10LSTTLLoadsCD74HC138E-55to12516LdPDIP

CD74