DM74LS157

更新时间： 2024-11-07 23:00:43

品牌	Logo	应用领域
美国国家半导体 - NSC		复用器
页数	文件大小	规格书
8页	162K
描述
Quad 2-Line to 1-Line Data Selectors/Multiplexers

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数据手册

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DM74LS157 数据手册

June 1989

54LS157/DM54LS157/DM74LS157,

54LS158/DM54LS158/DM74LS158

Quad 2-Line to 1-Line Data Selectors/Multiplexers

General Description

Features

Buffered inputs and outputs

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. The LS157 presents true data whereas the LS158

presents inverted data to minimize propagation delay time.

Typical Propagation Time

LS157 9 ns

LS158 7 ns

Typical Power Dissipation

LS157 49 mW

LS158 24 mW

Applications

Alternate

Military/Aerospace

device

(54LS157,

54LS158) is available. Contact a National Semiconduc-

tor Sales Office/Distributor for specifications.

Expand any data input point

Multiplex dual data buses

Generate four functions of two variables (one variable

is common)

Source programmable counters

Connection Diagrams

Dual-In-Line Package

TL/F/6396–2

TL/F/6396–1

Order Number 54LS158DMQB, 54LS158FMQB,

54LS158LMQB, DM54LS158J, DM54LS158W,

DM74LS158M or DM74LS158N

Order Number 54LS157DMQB, 54LS157FMQB,

54LS157LMQB, DM54LS157J, DM54LS157W,

DM74LS157M or DM74LS157N

See NS Package Number E20A, J16A,

M16A, N16E or W16A

See NS Package Number E20A, J16A,

M16A, N16E or W16A

Function Table

Inputs

Output Y

Strobe

Select

LS157

LS158

Low Level, X Don’t Care

High Level, L

1995 National Semiconductor Corporation

TL/F/6396

RRD-B30M105/Printed in U. S. A.

12 3 4 5 6 7 8

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与DM74LS157相关器件

型号	品牌	获取价格	描述	数据表
DM74LS157E	NSC	获取价格	Quad 2-Line to 1-Line Data Selectors/Multiplexers
DM74LS157J	NSC	获取价格	Quad 2-Line to 1-Line Data Selectors/Multiplexers
DM74LS157J	TI	获取价格	IC,LOGIC MUX,QUAD,2-INPUT,LS-TTL,DIP,16PIN,CERAMIC
DM74LS157J/A+	TI	获取价格	IC IC,LOGIC MUX,QUAD,2-INPUT,LS-TTL,DIP,16PIN,CERAMIC, Multiplexer/Demultiplexer
DM74LS157M	FAIRCHILD	获取价格	Quad 2-Line to 1-Line Data Selectors/Multiplexers
DM74LS157M	NSC	获取价格	Quad 2-Line to 1-Line Data Selectors/Multiplexers
DM74LS157MX	FAIRCHILD	获取价格	2-Input Digital Multiplexer
DM74LS157N	FAIRCHILD	获取价格	Quad 2-Line to 1-Line Data Selectors/Multiplexers
DM74LS157N	NSC	获取价格	Quad 2-Line to 1-Line Data Selectors/Multiplexers
DM74LS157N/A+	TI	获取价格	IC,LOGIC MUX,QUAD,2-INPUT,LS-TTL,DIP,16PIN,PLASTIC