December 1990

4

Philips Semiconductors

Product specification

Octal D-type transparent latch; 3-state;

inverting

74HC/HCT563

Fig.4 Functional diagram.

FUNCTION TABLE

Notes

1. H = HIGH voltage level

h = HIGH voltage level one set-up time prior to the

HIGH-to-LOW LE transition

L = LOW voltage level

l = LOW voltage level one set-up time prior to the

HIGH-to-LOW LE transition

Z = high impedance OFF-state

OPERATING

MODES

INPUTS

INTER-

NAL

LATCHES

OUT-

PUTS

OE

LE

enable and

read register

L

L

H

H

L

H

L

H

H

L

latch and read

register

L

L

L

L

l

h

L

H

H

L

latch register

and disable

outputs

H

H

L

L

l

h

L

H

Z

Z

Fig.5 Logic diagram.