IN74HCT20
D
UAL
4-I
NPUT
NAND G
ATE
High-Performance Silicon-Gate CMOS
The IN74HCT20 is identical in pinout to the LS/ALS20. The
IN74HCT20 may be used as a level converter for interfacing TTL
or NMOS outputs to High-Speed CMOS inputs.
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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
High Noise Immunity Characteristic of CMOS Devices
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ORDERING INFORMATION
IN74HCT20N Plastic
IN74HCT20D SOIC
T
A
= -55° to 125° C for all
packages
LOGIC DIAGRAM
PIN ASSIGNMENT
PIN 14 =V
CC
PIN 7 = GND
PINS 3,11 = NO CONNECTION
NC = NO CONNECTION
FUNCTION TABLE
Inputs
Output
A
B
C
D
Y
L
X
X
X
H
X
L
X
X
H
X
X
L
X
H
X
X
X
L
H
H
H
H
H
L
X = don’t care
1
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