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DM74LS273SJX

8-Bit Register with Clear

Fairchild Semiconductor 

October 1988

Revised March 2000

DM74LS273

8-Bit Register with Clear

General Description

The DM74LS273 is a high speed 8-bit register, consisting

of eight D-type flip-flops with a common Clock and an

asynchronous active LOW Master Reset. This device is

supplied in a 20-pin package featuring 0.3 inch row spac-

ing.

Features

s Edge-triggered

s 8-bit high speed register

s Parallel in and out

s Common clock and master reset

Ordering Code:

Order Number Package Number

Package Description

DM74LS273WM

M20B

20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide

DM74LS273SJ

M20D

20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

DM74LS273N

N20A

20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Logic Symbol

Connection Diagram

VCC = Pin 20

GND = Pin 10

Pin Descriptions

Truth Table

Pin Names

Description

CP

Clock Pulse Input (Active Rising Edge)

D0–D7

Data Inputs

MR

Asynchronous Master Reset Input (Active LOW)

Q0–Q7 Flip-Flop Outputs

Inputs

MR

CP

L

H

H

X

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

Outputs

Dn

Qn

X

L

H

H

L

L

© 2000 Fairchild Semiconductor Corporation DS009825

www.fairchildsemi.com

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