TECHNICAL DATA
IN74ACT273
Octal D Flip-Flop with
Common Clock and Reset
High-Speed Silicon-Gate CMOS
The IN74ACT273 is identical in pinout to the LS/ALS273,
HC/HCT273. The IN74ACT273 may be used as a level converter for
interfacing TTL or NMOS outputs to High Speed CMOS inputs.
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.
•
•
•
•
•
TTL/NMOS Compatible Input Levels
Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 4.5 to 5.5 V
Low Input Current: 1.0 µA; 0.1 µA @ 25°C
Outputs Source/Sink 24 mA
ORDERING INFORMATION
IN74ACT273N Plastic
IN74ACT273DW SOIC
TA = -40° to 85° C for all packages
PIN ASSIGNMENT
LOGIC DIAGRAM
FUNCTION TABLE
Inputs
Clock
X
Output
Reset
L
D
X
H
L
Q
L
H
PIN 20=VCC
PIN 10 = GND
H
H
L
H
L
X
X
no change
no change
H
X = don’t care
Rev. 00