TC74HC597AP/AF

2007-10-01

2

IEC Logic Symbol

Truth Table

Inputs

SI

SCK

SCLR

SLOAD

RCK

Function

X

X

L

H

X

S.R. is cleared to “L”

X

X

H

L

X

Input register data is stored into S.R.

L

H

H

X

First stage of S.R. become “L”. Other stages store the data of previous stage,

respectively.

H

H

H

X

First stage of S.R. become “H”. Other stages store the data of previous stage,

respectively.

X

H

H

X

State of S.R. is not changed.

X

X

X

X

Input data on A to H line is stored into input register.

X

X

X

X

Storage register stage is not changed.

X: Don’t care