TECHNICAL DATA
IN74HC21A
Dual 4-Input AND Gate
The IN74HC21A is high-speed Si-gate CMOS device and is pin
compatible with pullup resistors with low power Schottky TTL (LSTTL).
The device provide the Dual 4-input AND function.
•
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
ORDERING INFORMATION
IN74HC21AN
Plastic
IN74HC21AD
SOIC
T
A
= -55° to 125° C for all packages
LOGIC DIAGRAM
PIN ASSIGNMENT
A1
B1
Y1
C1
C1
D1
A1
B1
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V CC
D2
C2
B2
A2
Y2
A2
B2
Y2
C2
D2
Y1
GND
FUNCTION TABLE
Inputs
A
L
PIN 14 =V
CC
PIN 7 = GND
Output
С
X
X
L
X
H
D
X
X
X
L
H
Y
L
L
L
L
H
B
X
L
X
X
H
X
X
X
H
X = don’t care
Rev. 00
IKSEMICON [ IK SEMICON CO., LTD ]
