IN74HCT240A
OCTAL 3-STATE INVERTING BUFFER/LINE
DRIVER/LINE RECEIVER
High-Performance Silicon-Gate CMOS
The IN74HCT240A is identical in pinout to the LS/ALS240.
The IN74HCT240A may be used as a level converter for
interfacing TTL or NMOS outputs to High Speed CMOS inputs.
This octal inverting buffer/line driver/line receiver is designed
to be used with 3-state memory address drivers, clock drivers,
and other bus-oriented systems. The device has inverting
outputs and two active-low output enables.
• 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
ORDERING INFORMATION
IN74HCT240AN Plastic
IN74HCT240ADW SOIC
TA = -55° to 125° C for all
packages
PIN ASSIGNMENT
LOGIC DIAGRAM
FUNCTION TABLE
Inputs
Outputs
YA,YB
Enable A,
A,B
Enable B
PIN 20=VCC
L
L
H
X
H
L
Z
PIN 10 = GND
L
H
X = don’t care
Z = high impedance
1
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