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54ACT139
Dual 1-of-4 Decoder/Demultiplexer
General Description
The 鈥橝C/鈥橝CT139 is a high-speed, dual 1-of-4 decoder/
demultiplexer. The device has two independent decoders,
each accepting two inputs and providing four
mutually-exclusive active-LOW outputs. Each decoder has
an active-LOW Enable input which can be used as a data in-
put for a 4-output demultiplexer. Each half of the 鈥橝C/
鈥橝CT139 can be used as a function generator providing all
four minterms of two variables.
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Multifunction capability
Two completely independent 1-of-4 decoders
Active LOW mutually exclusive outputs
Outputs source/sink 24 mA
鈥橝CT139 has TTL-compatible inputs
Standard Military Drawing (SMD)
鈥?鈥橝C139: 5962-87623
鈥?鈥橝CT139: 5962-87553
Features
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I
CC
reduced by 50%
Logic Symbols
IEEE/IEC
DS100269-8
DS100269-2
Pin Names
A
0
, A
1
E
O
0
鈥揙
3
Description
Address Inputs
Enable Inputs
Outputs
DS100269-1
FACT
廬
is a registered trademark of Fairchild Semiconductor Corporation.
漏 1998 National Semiconductor Corporation
DS100269
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