© 2000 Fairchild Semiconductor Corporation DS009825 www.fairchildsemi.com
October 1988
Revised March 2000
DM74LS273
8-
Bit
Regi
ster
wi
th
Clear
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
a73 Edge-triggered
a73 8-bit high speed register
a73 Parallel in and out
a73 Common clock and master reset

Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
V
CC
= Pin 20
GND = Pin 10
Pin Descriptions
Connection Diagram
Truth Table
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
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
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 Outputs
MR CP D
n
Q
n
LXXL
H c17 HH
H c17 LL