DM74157 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
鈥?Expand any data input point
鈥?Multiplex dual data buses
鈥?Generate four functions of two variables (one variable is
common)
鈥?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
DM74157N
Package Number
N16E
Package Description
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Connection Diagram
Logic Diagram
Function Table
Inputs
Strobe
H
L
L
L
L
Select
X
L
L
H
H
A
X
L
H
X
X
B
X
X
X
L
H
Output Y
L
L
H
L
H
H
=
HIGH Level, L
=
LOW Level, X
=
Don鈥檛 Care
漏 2000 Fairchild Semiconductor Corporation
DS006550
www.fairchildsemi.com