M74HC597 データシートの表示（PDF） - STMicroelectronics

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M74HC597

8 BIT LATCH/SHIFT REGISTER

STMicroelectronics 

M54/M74HC597

INPUT AND OUTPUT EQUIVALENT CIRCUIT

TRUTH TABLE

INPUTS

SI

SCK SCLR SLOAD RCK

X

X

L

H

X

X

X

H

L

X

L

H

H

X

H

H

H

X

X

H

H

X

X

X

X

X

X

X

X

X

X: DON’T CARE

OUTPUT

S.R. IS CLEARED TO ”L”

INPTU REGISTER DATA IS STORED INTO S.R.

FIRST STAGE OF S.R. BECOMES ”L” OTHER STAGES

STORE THE DATA OF PREVIOUS STAGE, RESPECTIVELY

FIRST STAGE OF S.R. BECOMES ”H” OTHER STAGES

STORE THE DATA OF PREVIOUS STAGE, RESPECTIVELY

STATE OF S.R IS NOT CHANGED

INPUT DATA ON A ~ H LINE IS STORED INTO INPUT

REGISTER

STORAGE REGISTER STATE IS NOT CHANGED

LOGIC DIAGRAM

2/13

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