54FCT540

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.

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.

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

n Standard Microcircuit Drawing (SMD) 5962-8976701

Logic Symbol

Inputs

Outputs

OE

1

OE

2

I

LL

H

L

HX

X

Z

XH

X

Z

LL

L

H

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

Z = High Impedance

Connection Diagrams

IEEE/IEC

DS100970-1

Pin Assignment

for DIP and Flatpak

DS100970-3

Pin Assignment for LCC

DS100970-2

October 1999

© 1999 National Semiconductor Corporation

DS100970

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