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Fairchild Semiconductor Electronic Components Datasheet

DM74S158 Datasheet

Quad 1 of 2 Line Data Selector/Multiplexer

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August 1986
Revised April 2000
DM74S157 DM74S158
Quad 1 of 2 Line Data Selector/Multiplexer
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. The DM74S157 presents true data whereas
the DM74S158 presents inverted data to minimize propa-
gation delay time.
Applications
• Expand any data input point
• Multiplex dual data buses
• Generate four functions of two variables (one variable is
common)
• Source programmable counters
Features
s Buffered inputs and outputs
s Typical propagation time
DM74S157 5 ns
DM74S158 4 ns
s Typical power dissipation
DM74S157 250 mW
DM74S158 195 mW
Ordering Code:
Order Number
DM74S157N
DM74S158N
Package Number
Package Description
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Connection Diagrams
DM74S157
DM74S158
© 2000 Fairchild Semiconductor Corporation DS006470
www.fairchildsemi.com


Fairchild Semiconductor Electronic Components Datasheet

DM74S158 Datasheet

Quad 1 of 2 Line Data Selector/Multiplexer

No Preview Available !

Function Table
H = HIGH Level
L = LOW Level
X = Don’t Care
Strobe
H
L
L
L
L
Logic Diagrams
Inputs
Select
A
XX
LL
LH
HX
HX
B
X
X
X
L
H
DM74S157
Output Y
DM74S157 DM74S158
LH
LH
HL
LH
HL
DM74S158
www.fairchildsemi.com
2


Part Number DM74S158
Description Quad 1 of 2 Line Data Selector/Multiplexer
Maker Fairchild Semiconductor
Total Page 5 Pages
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