M74HC273

2/11

INPUT AND OUTPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION

TRUTH TABLE

X : Don’t Care

LOGIC DIAGRAM

This logic diagram has not be used to estimate propagation delays

PIN No

SYMBOL

NAME AND FUNCTION

1

CLEAR

Master Reset Input

(Active LOW)

2, 5, 6, 9, 12,

15, 16, 19

Q0 to Q7

Flip Flop Outputs

3, 4, 7, 8, 13,

14, 17, 18

D0 to D7

Data Inputs

11

CLOCK

Clock Input (LOW to

HIGH, Edge Triggered)

10

GND

Ground (0V)

20

Vcc

Positive Supply Voltage

INPUTS

OUTPUTS

FUNCTION

CLEAR

CLOCK

D

Q

L

X

X

L

CLEAR

HL

L

HH

H

H

X

Qn

NO CHANGE