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JM54AC138 Datasheet, PDF (1/10 Pages) National Semiconductor (TI) – 1-of-8 Decoder Demultiplexer | |||
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August 1998
54AC138 ⢠54ACT138
1-of-8 Decoder/Demultiplexer
General Description
The âAC/âACT138 is a high-speed 1-of-8 decoder/
demultiplexer. This device is ideally suited for high-speed bi-
polar memory chip select address decoding. The multiple in-
put enables allow parallel expansion to a 1-of-24 decoder
using just three âAC/âACT138 devices or a 1-of-32 decoder
using four âAC/âACT138 devices and one inverter.
Features
n ICC reduced by 50%
n Demultiplexing capability
n Multiple input enable for easy expansion
n Active LOW mutually exclusive outputs
n Outputs source/sink 24 mA
n âACT138 has TTL-compatible inputs
n Standard Microcircuit Drawing (SMD)
â âAC138: 5962-87622
â âACT138: 5962-87554
Logic Symbols
Connection Diagrams
Pin Assignment
for DIP and Flatpak
IEEE/IEC
DS100268-1
Pin Names
A0â A2
E1â E2
E3
O0â O7
Description
Address Inputs
Enable Inputs
Enable Input
Outputs
DS100268-7
DS100268-2
Pin Assignment
for LCC
DS100268-3
FACT® is a registered trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100268
www.national.com
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