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DM74LS157W Folha de dados(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Nome de Peças DM74LS157W
Descrição Electrónicos  Quad 2-Line to 1-Line Data Selectors/Multiplexers
Download  8 Pages
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Fabricante Electrônico  NSC [National Semiconductor (TI)]
Página de início  http://www.national.com
Logo NSC - National Semiconductor (TI)

DM74LS157W Folha de dados(HTML) 1 Page - National Semiconductor (TI)

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TLF6396
June 1989
54LS157DM54LS157DM74LS157
54LS158DM54LS158DM74LS158
Quad 2-Line to 1-Line Data SelectorsMultiplexers
General Description
These data selectorsmultiplexers 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
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
LS157
9 ns
LS158
7 ns
Y
Typical Power Dissipation
LS157
49 mW
LS158
24 mW
Y
Alternate
MilitaryAerospace
device
(54LS157
54LS158) is available Contact a National Semiconduc-
tor Sales OfficeDistributor for specifications
Connection Diagrams
Dual-In-Line Package
TLF6396 – 1
Order Number 54LS157DMQB 54LS157FMQB
54LS157LMQB DM54LS157J DM54LS157W
DM74LS157M or DM74LS157N
See NS Package Number E20A J16A
M16A N16E or W16A
Dual-In-Line Package
TLF6396 – 2
Order Number 54LS158DMQB 54LS158FMQB
54LS158LMQB DM54LS158J DM54LS158W
DM74LS158M or DM74LS158N
See NS Package Number E20A J16A
M16A N16E or W16A
Function Table
Inputs
Output Y
Strobe
Select
A
B
LS157
LS158
HX
X
X
L
H
LL
L
X
L
H
LL
H
X
H
L
LH
X
L
L
H
LH
X
H
H
L
H e High Level L e Low Level X e Don’t Care
C1995 National Semiconductor Corporation
RRD-B30M105Printed in U S A


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