54FCT138 Datasheet, PDF (1/7 Pages) National Semiconductor (TI) – 1-of-8 Decoder/Demultiplexer

October 1999
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
54FCT138DMQB
54FCT138FMQB
54FCT138LMQB
Logic Symbols
Package
Number
J16A
W16A
E20A
Package Description
16-Lead Ceramic Dual-In-Line
16-Lead Cerpack
20-Lead Ceramic Leadless Chip Carrier, Type C
Connection Diagrams
Pin Assignment
for DIP and Flatpak
IEEE/IEC
DS100963-1
DS100963-2
Pin Assignment
for LCC
DS100963-7
Pin Names
A₀– A₂
E₁– E₂
E₃
O₀– O₇
Description
Address Inputs
Enable Inputs
Enable Input
Outputs
FACT^® is a registered trademark of Fairchild Semiconductor Corporation.
© 1999 National Semiconductor Corporation DS100963
DS100963-3
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