QUAD2CHANNELMULTIPLEXER(3-STATE)

DESCRIPTION TheM74HC257isanhighspeedCMOSQUAD2CHANNELMULTIPLEXER(3-STATE)fabricatedwithsilicongateC2MOStechnology. ■HIGHSPEED:tPD=11ns(TYP.)atVCC=6V ■LOWPOWERDISSIPATION:ICC=4µA(MAX.)atTA=25°C ■HIGHNOISEIMMUNITY:VNIH=VNIL=28VCC(MIN.) ■SYMMETRICAL

Quad2-inputmultiplexer;3-state

Generaldescription The74HC257;74HCT257arehigh-speedSi-gateCMOSdevicesandarepincompatiblewithLow-powerSchottkyTTL(LSTTL). The74HC257and74HCT257havefouridentical2-inputmultiplexerswith3-stateoutputs,whichselect4bitsofdatafromtwosourcesandarecontrolledbyac

QUAD2-CHANELMULTIPLEXER(3-STATE)

Quad.2-to-1-lineDataSelectors/Multiplexers(withnoninverted3-stateoutputs)

Description Thelargeoutputdrivecapabilitycoupledwiththe3-statefeaturemakethisdeviceidealforinterfacingwithbuslinesinabusorganizedsystem.Whentheoutputcontrolinputlineistakenhigh,theoutputsofallfourmultiplexersaresentintoahighimpedancestate.Whentheout

Quad2-inputmultiplexer3-state

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HighSpeedCMOSLogicQuad2-InputMultiplexerwithThree-StateNon-InvertingOutputs

文件：52.16 Kbytes Page：7 Pages