U74HC595AG-P16-R datasheet(2/8 Pages) UTC

2 / 8 page

U74HC595A

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

2 of 8

www.unisonic.com.tw

QW-R502-354.H



PIN CONFIGURATION



FUNCTION TABLE

INPUTS

OUTPUTS

FUNCTION

SRCLK

RCLK

SRCLR

SER

QH’ Qn

A Low-Level on

SRCLR only affects the shift

registers.

Empty shift register loaded into storage register.

↑

Shift register clear. Parallel outputs in

high-impedance OFF-state

Logic high level shifted into the first shift register.

Contents of all shift register stages shifted through,

e.g. previous state of stage G(internal QG’) appears

on the serial output(QH’).

↑

QG’ NC

Contents of shift register stages (internal Qn’) are

transferred to the storage register and parallel

output stages.

↑

Qn’

Contents of shift register shifted through. Previous

contents of the shift register is transferred to the

storage register and the parallel output stages.

↑

QG’ Qn’

Note:H : HIGH voltage level.

L : LOW voltage level.

X : Don’t care.

Z : High impedance OFF-state.

NC: No change.

↑ : Low-to-High transition.

↓ : High-to-Low transition.

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