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第4章 双向4位移位寄存器-74hc194.pdf

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CD54HC194,CD74HC194,

CD74HCT194

DatasheetacquiredfromHarrisSemiconductor

SCHS164G

High-SpeedCMOSLogic

September1997-RevisedMay20064-BitBidirectionalUniversalShiftRegister

FeaturesDescription

•FourOperatingModesThe’HC194andCD74HCT194are4-bitshiftregisterswith

-ShiftRight,ShiftLeft,HoldandResetAsynchronousMasterReset(MR).Intheparallelmode(S0

[/Title•SynchronousParallelorSerialOperationandS1arehigh),dataisloadedintotheassociatedflip-flop

(CD74andappearsattheoutputafterthepositivetransitionofthe

•Typicalf=60MHzatV=5V,C=15pF,clockinput(CP).Duringparallelloadingserialdataflowis

HC194,MAXCCL

TA=25oCinhibited.Shiftleftandshiftrightareaccomplished

CD74H

synchronouslyonthepositiveclockedgewithserialdata

CT194)•AsynchronousMasterResetenteredattheshiftleft(DSL)serialinputfortheshiftleft

/Sub-•Fanout(OverTemperatureRange)mode,andat

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