DM74157 Просмотр технического описания (PDF) - Fairchild Semiconductor
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DM74157 Datasheet PDF : 3 Pages
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August 1986
Revised July 2001
DM74157
Quad 2-Line to 1-Line Data Selectors/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.
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 9 ns
s Typical power dissipation 150 mW
Ordering Code:
Order Number Package Number
Package Description
DM74157N
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
Connection Diagram
Logic Diagram
Function Table
Strobe
H
L
L
L
L
H = HIGH Level,
Inputs
Select
A
B
X
X
X
L
L
X
L
H
X
H
X
L
H
X
H
L = LOW Level, X = Don’t Care
Output Y
L
L
H
L
H
© 2001 Fairchild Semiconductor Corporation DS006550
www.fairchildsemi.com
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