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54157 の電気的特性と機能

54157のメーカーはNational Semiconductorです、この部品の機能は「Quad 2-Line to 1-Line Data Selectors/Multiplexers」です。


製品の詳細 ( Datasheet PDF )

部品番号 54157
部品説明 Quad 2-Line to 1-Line Data Selectors/Multiplexers
メーカ National Semiconductor
ロゴ National Semiconductor ロゴ 




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54157 Datasheet, 54157 PDF,ピン配置, 機能
June 1989
54157 DM54157 DM74157
Quad 2-Line to 1-Line Data Selectors Multiplexers
General Description
These data selectors multiplexers contain inverters and
drivers to supply full on-chip data selection to the four out-
put gates A separate strobe input is provided A 4-bit word
is selected from one of two sources and is routed to the four
outputs
Applications
Y Expand any data input point
Y Multiplex dual data buses
Y Generate four functions of two variables (one variable
is common)
Y Source programmable counters
Features
Y Buffered inputs and outputs
Y Typical propagation time 9 ns
Y Typical power dissipation 150 mW
Y Alternate Military Aerospace device (54157) is avail-
able Contact a National Semiconductor Sales Office
Distributor for specifications
Connection Diagram
Dual-In-Line Package
TL F 6550 – 1
Order Number 54157DMQB 54157FMQB DM54157J DM54157W or DM74157N
See NS Package Number J16A N16E or W16A
Function Table
Inputs
Strobe Select A B
H X XX
L L LX
L L HX
L H XL
L H XH
H e High Level L e Low Level X e Don’t Care
Output Y
L
L
H
L
H
C1995 National Semiconductor Corporation TL F 6550
RRD-B30M105 Printed in U S A

1 Page





54157 pdf, ピン配列
Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load)
Symbol
Parameter
From (Input)
To (Output)
RL e 400X CL e 15 pF
Min Max
Units
tPLH
Propagation Delay Time
Low to High Level Output
Data
to Y
14 ns
tPHL
Propagation Delay Time
High to Low Level Output
Data
to Y
14 ns
tPLH
Propagation Delay Time
Low to High Level Output
Strobe
to Y
20 ns
tPHL
Propagation Delay Time
High to Low Level Output
Strobe
to Y
21 ns
tPLH
Propagation Delay Time
Low to High Level Output
Select
to Y
23 ns
tPHL
Propagation Delay Time
High to Low Level Output
Select
to Y
27 ns
Logic Diagram
157
TL F 6550 – 2
3


3Pages


54157 電子部品, 半導体
Physical Dimensions inches (millimeters) (Continued)
16-Lead Ceramic Flat Package (W)
Order Number 54157FMQB or DM54157W
NS Package Number W16A
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION As used herein
1 Life support devices or systems are devices or
systems which (a) are intended for surgical implant
into the body or (b) support or sustain life and whose
failure to perform when properly used in accordance
with instructions for use provided in the labeling can
be reasonably expected to result in a significant injury
to the user
2 A critical component is any component of a life
support device or system whose failure to perform can
be reasonably expected to cause the failure of the life
support device or system or to affect its safety or
effectiveness
National Semiconductor
Corporation
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Arlington TX 76017
Tel 1(800) 272-9959
Fax 1(800) 737-7018
National Semiconductor
Europe
Fax (a49) 0-180-530 85 86
Email cnjwge tevm2 nsc com
Deutsch Tel (a49) 0-180-530 85 85
English Tel (a49) 0-180-532 78 32
Fran ais Tel (a49) 0-180-532 93 58
Italiano Tel (a49) 0-180-534 16 80
National Semiconductor
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Ocean Centre 5 Canton Rd
Tsimshatsui Kowloon
Hong Kong
Tel (852) 2737-1600
Fax (852) 2736-9960
National Semiconductor
Japan Ltd
Tel 81-043-299-2309
Fax 81-043-299-2408
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

6 Page



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共有リンク

Link :


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