DM74LS273 Datasheet, PDF (1/6 Pages) Fairchild Semiconductor – 8-Bit Register with Clear

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
V_CC = 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
D_n
Q_n
X
L
H
H
L
L
© 2000 Fairchild Semiconductor Corporation DS009825
www.fairchildsemi.com