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PDF ( 数据手册 , 数据表 ) 54AC139

零件编号 54AC139
描述 Dual 1-of-4 Decoder/Demultiplexer
制造商 National Semiconductor
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54AC139 数据手册, 描述, 功能
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August 1998
54AC139 54ACT139
Dual 1-of-4 Decoder/Demultiplexer
General Description
The ’AC/’ACT139 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 ’AC/
’ACT139 can be used as a function generator providing all
four minterms of two variables.
n Multifunction capability
n Two completely independent 1-of-4 decoders
n Active LOW mutually exclusive outputs
n Outputs source/sink 24 mA
n ’ACT139 has TTL-compatible inputs
n Standard Military Drawing (SMD)
— ’AC139: 5962-87623
— ’ACT139: 5962-87553
Features
n ICC reduced by 50%
Logic Symbols
IEEE/IEC
DS100269-8
DS100269-1
Pin Names
A0, A1
E
O0– O3
DS100269-2
Description
Address Inputs
Enable Inputs
Outputs
FACT® is a registered trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100269
www.national.com







54AC139 pdf, 数据表
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
16 Lead Ceramic Flatpak (F)
NS Package Number W16A
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DE-
VICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMI-
CONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or sys- 2. A critical component in any component of a life support
tems which, (a) are intended for surgical implant into
device or system whose failure to perform can be rea-
the body, or (b) support or sustain life, and whose fail-
sonably expected to cause the failure of the life support
ure to perform when properly used in accordance
device or system, or to affect its safety or effectiveness.
with instructions for use provided in the labeling, can
be reasonably expected to result in a significant injury
to the user.
National Semiconductor
Corporation
Americas
Tel: 1-800-272-9959
Fax: 1-800-737-7018
www.national.com
National Semiconductor
Europe
Fax: +49 (0) 1 80-530 85 86
Deutsch Tel: +49 (0) 1 80-530 85 85
English Tel: +49 (0) 1 80-532 78 32
Français Tel: +49 (0) 1 80-532 93 58
Italiano Tel: +49 (0) 1 80-534 16 80
National Semiconductor
Asia Pacific Customer
Response Group
Tel: 65-2544466
Fax: 65-2504466
National Semiconductor
Japan Ltd.
Tel: 81-3-5620-6175
Fax: 81-3-5620-6179
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.














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