U74AHC595

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

2 of 7

www.unisonic.com.tw

QW-R502-997.B

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PIN CONFIGURATION

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FUNCTION TABLE

INPUTS

FUNCTION

SER

SRCLK

SRCLR

RCLK

OE

X

X

X

X

H

X

X

X

X

L

X

X

L

X

X

Shift register is cleared.

L

↑

H

X

X

First stage of the shift register goes low.

Other stages store the data of previous stage, respectively.

H

↑

H

X

X

First stage of the shift register goes high.

Other stages store the data of previous stage, respectively.

X

X

X

↑

X

Shift-register data is stored into the storage register.

L: low voltage level; H: high voltage level; ↑: low-to-high; X: don’t care