October 1999
54FCT540
Octal Buffer/Line Driver with TRI-STATE® Outputs
General Description
The ’FCT540 is an octal buffer/line drivers designed to be
employed as memory and address drivers, clock drivers and
bus oriented transmitter/receivers.
Features
n TRI-STATE inverting outputs
n Inputs and outputs opposite side of package, allowing
easier interface to microprocessors
n TTL input and output level compatible
n CMOS power consumption
n Output sink capability of 48mA, source capability of 12
mA
These devices are similar in function to the ’FCT240 while
providing flow-through architecture (inputs on opposite side
from outputs). This pinout arrangement makes these devices
especially useful as output ports for microprocessors, allow-
ing ease of layout and greater PC board density.
n Standard Microcircuit Drawing (SMD) 5962-8976701
Logic Symbol
Connection Diagrams
Pin Assignment
IEEE/IEC
for DIP and Flatpak
DS100970-3
DS100970-1
Pin Assignment for LCC
Inputs
Outputs
OE1
L
OE2
L
I
H
X
X
L
L
Z
Z
H
H
X
X
H
L
L
=
=
=
=
H
L
X
Z
HIGH Voltage Level
LOW Voltage Level
Immaterial
DS100970-2
High Impedance
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
™
FACT is a trademark of Fairchild Semiconductor Corporation.
© 1999 National Semiconductor Corporation
DS100970
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