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.
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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
IN74HC21AD
Plastic
SOIC
TA = -55° to 125° C for all packages
LOGIC DIAGRAM
PIN ASSIGNMENT
A1
V
A1
B1
1
2
3
4
5
6
7
14
13
12
11
10
9
CC
B1
Y1
C1
D2
C2
C1
D1
B2
A2
Y2
Y1
A2
GND
8
B2
Y2
C2
FUNCTION TABLE
D2
Inputs
Output
A
L
B
X
L
С
X
X
L
D
X
X
X
L
Y
L
L
L
L
H
X
X
X
H
PIN 14 =VCC
PIN 7 = GND
X
X
H
X
H
H
X = don’t care
Rev. 00
IKSEMICON [ IK SEMICON CO., LTD ]
