IN74ACT21
D
UAL
4-I
NPUT
AND G
ATE
High-Speed Silicon-Gate CMOS
The IN74ACT21 is identical in pinout to the LS/ALS21,
HC/HCT21. The IN74ACT21 may be used as a level converter
for interfacing TTL or NMOS outputs to High Speed CMOS
inputs.
•
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
IN74ACT21N Plastic
IN74ACT21D SOIC
T
A
= -40° to 85° C for all
packages
•
•
•
•
PIN ASSIGNMENT
LOGIC DIAGRAM
NC = NO CONNECTION
FUNCTION TABLE
Inputs
Output
A
B
C
D
Y
L
X
X
X
L
X
L
X
X
L
X
X
L
X
L
X
X
X
L
L
H
H
H
H
H
X = don’t care
PIN 14 =V
CC
PIN 7 = GND
PINS 3,11 = NO CONNECTION
1