74273 datasheet(2/11 Pages) STMICROELECTRONICS

Teilenummer	74273

Bauteilbeschribung	OCTAL D TYPE FLIP FLOP WITH CLEAR

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TRUTH TABLE

INPUTS

OUTPUS

FUNCTION

CLEAR

CLOCK

D

Q

L

X

L

CLEAR

HL

L

HH

H

X

Qn

NO CHANGE

X: Don’t Care

LOGIC DIAGRAM

PIN DESCRIPTION

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

IEC LOGIC SYMBOL

M54/M74HC273

2/11

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