U74HC595AG-P16-R datasheet(2/7 Pages) UTC

2 / 7 page

U74HC595A

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

2 of 7

www.unisonic.com.tw

QW-R502-354.E



PIN CONFIGURATION



FUNCTION TABLE

Operation

INPUT

OUTPUT

Reset

Serial

input A

Shift

clock

Latch

clock

Output

enable

SQH

QA to QH

Reset shift register

L,H, 

Shift data into shift



L,H, 

D SRA

SRNSRN+1

SRGSRH

Shift register remains

unchanged

L,H,  L,H, 

Transfer shift register

contents to latch

L,H, 



SRNLRN

SRN

Latch register remains

unchanged

L,H, 

Enable parallel outputs

Enabled

Force outputs into high

impedance state

SR: shift register contents

LR: latch register contents

NC: unchanged

D: data(L,H) logic level



: low-to-high



: high-to-low

*: depends on Reset and Shift Clock inputs

**: depends on Latch Clock inputs



LOGIC DIAGRAM

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