DM74157 Datasheet, PDF (1/3 Pages) Fairchild Semiconductor – Quad 2-Line to 1-Line Data Selectors/Multiplexer

August 1986
Revised February 2000
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
Inputs
Strobe
Select
A
B
H
X
X
X
L
L
L
X
L
L
H
X
L
H
X
L
L
H
X
H
H = HIGH Level, L = LOW Level, X = Don’t Care
Output Y
L
L
H
L
H
© 2000 Fairchild Semiconductor Corporation DS006550
www.fairchildsemi.com