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National Semiconductor |
July 1998
54ABT240
Octal Buffer/Line Driver with TRI-STATE® Outputs
General Description
The ’ABT240 is an inverting octal buffer and line driver de-
signed to be employed as a memory address driver, clock
driver and bus oriented transmitter or receiver which pro-
vides improved PC board density.
n Guaranteed latchup protection
n High impedance glitch free bus loading during entire
power up and power down cycle
n Nondestructive hot insertion capability
n Standard Microcircuit Drawing (SMD) — 5962-9318801
Features
n Output sink capability of 48 mA, source capability of
24 mA
Ordering Code
Military
54ABT240J-QML
54ABT240W-QML
54ABT240E-QML
Connection Diagrams
Package
Number
J20A
W20A
E20A
Package Description
20-Lead Ceramic Dual-In-Line
20-Lead Cerpack
20-Lead Ceramic Leadless Chip Carrier, Type C
Pin Assignment
for DIP and Flatpak
Pin Assignment
for LCC
DS100202-1
DS100202-2
Pin Names
OE1, OE2
I0– I7
O0– O7
Description
TRI-STATE Output
Enable Inputs
Inputs
Outputs
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100202
www.national.com
Truth Tables
Inputs
OE1
L
L
H
In
L
H
X
Inputs
OE2
L
L
H
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
In
L
H
X
Outputs
(Pins 12, 14, 16, 18)
H
L
Z
Outputs
(Pins 3, 5, 7, 9)
H
L
Z
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