M74HC564

2/11

INPUT AND OUTPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION

TRUTH TABLE

X: Don’t Care

Z: High Impedance

LOGIC DIAGRAM

This logic diagram has not be used to estimate propagation delays

PIN No

SYMBOL

NAME AND FUNCTION

1OE

3 State Output Enable

Input (Active LOW)

2, 3, 4, 5, 6,

7, 8, 9, 10

D0 to D7

Data Inputs

12, 13, 14,

15, 16, 17,

18, 19

Q0 to Q7

3 State Outputs

11

CLOCK

Clock Input (LOW to

HIGH, edge triggered)

10

GND

Ground (0V)

20

Positive Supply Voltage

INPUTS

OUTPUT

OE

CK

D

Q

H

XXZ

L

X

NO CHANGE

LL

H

LH

L