54FCT138

1-of-8 Decoder/Demultiplexer

General Description

The FCT138 is a high-speed 1-of-8 decoder/demultiplexer.

This device is ideally suited for high-speed bipolar memory

chip select address decoding. The multiple input enables al-

low parallel expansion to a 1-of-24 decoder using just three

FCT138 devices or a 1-of-32 decoder using four FCT138 de-

vices and one inverter.

Features

n Demultiplexing capability

n Multiple input enable for easy expansion

n Active LOW mutually exclusive outputs

n Outputs sink capability of 32mA, source capability of

12mA

n TTL input and output level compatible

n CMOS power consumption

n Standard Microcircuit Drawing (SMD) 5962-8765401

Ordering Code

Military

Package

Package Description

Number

54FCT138DMQB

J16A

16-Lead Ceramic Dual-In-Line

54FCT138FMQB

W16A

16-Lead Cerpack

54FCT138LMQB

E20A

20-Lead Ceramic Leadless Chip Carrier, Type C

Logic Symbols

Pin Names

Description

A

Address Inputs

E

Enable Inputs

E

3

Enable Input

O

Outputs

Connection Diagrams

DS100963-1

IEEE/IEC

DS100963-7

Pin Assignment

for DIP and Flatpak

DS100963-2

Pin Assignment

for LCC

DS100963-3

October 1999

© 1999 National Semiconductor Corporation

DS100963

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