IN74HC273A
O
CTAL
D F
LIP
-F
LOP WITH
C
OMMON
C
LOCK AND
R
ESET
High-Performance Silicon-Gate CMOS
The IN74HC273A is identical in pinout to the LS/ALS273. The
device inputs are compatible with standard CMOS outputs; with
pullup resistors, they are compatible with LS/ALSTTL outputs.
This device consists of eight D flip-flops with common Clock
and Reset inputs. Each flip-flop is loaded with a low-to-high
transition of the Clock input. Reset is asynchronous and active
low.
Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 2.0 to 6.0 V
Low Input Current: 1.0
µA
High Noise Immunity Characteristic of CMOS Devices
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ORDERING INFORMATION
IN74HC273AN Plastic
IN74HC273ADW SOIC
T
A
= -55° to 125° C for all
packages
PIN ASSIGNMENT
LOGIC DIAGRAM
PIN 20=V
CC
PIN 10 = GND
Reset
L
H
H
H
H
FUNCTION TABLE
Inputs
Clock
X
D
X
H
L
X
X
Output
Q
L
H
L
no change
no change
L
X = don’t care
1
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