TL/F/6392
54LS151/DM54LS151/DM74LS151
Data
Selector/Multiplexer
June 1989
54LS151/DM54LS151/DM74LS151
Data Selector/Multiplexer
General Description
This data selector/multiplexer contains full on-chip decod-
ing to select the desired data source. The ’LS151 selects
one-of-eight data sources. The ’LS151 has a strobe input
which must be at a low logic level to enable these devices.
A high level at the strobe forces the W output high, and the
Y output low.
The ’LS151 features complementary W and Y outputs.
Features
Y
Select one-of-eight data lines
Y
Performs parallel-to-serial conversion
Y
Permits multiplexing from N lines to one line
Y
Also for use as Boolean function generator
Y
Typical average propagation delay time data input to W
output 12.5 ns
Y
Typical power dissipation 30 mW
Y
Alternate Military/Aerospace device (54LS151) is avail-
able. Contact a National Semiconductor Sales Office/
Distributor for specifications.
Connection Diagram
Dual-In-Line Package
TL/F/6392–1
Order Number 54LS151DMQB, 54LS151FMQB, 54LS151LMQB,
DM54LS151J, DM54LS151W, DM74LS151M or DM74LS151N
See NS Package Number E20A, J16A, M16A, N16E or W16A
Truth Table
Inputs Outputs
Select Strobe
YW
CBA
S
XXX H L H
L L L L D0 D0
L L H L D1 D1
L H L L D2 D2
L H H L D3 D3
H L L L D4 D4
H L H L D5 D5
H H L L D6 D6
H H H L D7 D7
H e High Level, L e Low Level, X e Don’t Care
D0, D1...D7 e the level of the respective D input
C
1995 National Semiconductor Corporation RRD-B30M105/Printed in U. S. A.