M74HC563

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INPUT AND OUTPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION

TRUTH TABLE

X: Don’t Care

Z: High Impedance

(*): Q outputs are latched at the time when the LE input is taken low logic level.

LOGIC DIAGRAM

PIN No

SYMBOL

NAME AND FUNCTION

1OE

3 State Output Enable

Input (Active LOW)

2, 3, 4, 5, 6,

7, 8, 9

D0 to D7

Data Inputs

12, 13, 14,

15, 16, 17,

18, 19

Q0 to Q7

3 State Latch Outputs

11

LE

Latch Enable Input

10

GND

Ground (0V)

20

Positive Supply Voltage

INPUTS

OUTPUTS

OE

LE

D

Q

H

XXZ

L

L

X

NO CHANGE (*)

LHL

H

LH

H

L