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
Y
Y
Y
Y
Y
Y
Select one-of-eight data lines
Performs parallel-to-serial conversion
Permits multiplexing from N lines to one line
Also for use as Boolean function generator
Typical average propagation delay time data input to W
output 12 5 ns
Typical power dissipation 30 mW
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
Select
C
X
L
L
L
L
H
H
H
H
B
X
L
L
H
H
L
L
H
H
A
X
L
H
L
H
L
H
L
H
Strobe
S
H
L
L
L
L
L
L
L
L
Outputs
Y
L
D0
D1
D2
D3
D4
D5
D6
D7
W
H
D0
D1
D2
D3
D4
D5
D6
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
TL F 6392
RRD-B30M105 Printed in U S A
Absolute Maximum Ratings
(Note)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage
7V
Input Voltage
7V
Operating Free Air Temperature Range
b
55 C to
a
125 C
DM54LS and 54LS
DM74LS
0 C to
a
70 C
b
65 C to
a
150 C
Storage Temperature Range
Note
The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaran-
teed The device should not be operated at these limits The
parametric values defined in the ‘‘Electrical Characteristics’’
table are not guaranteed at the absolute maximum ratings
The ‘‘Recommended Operating Conditions’’ table will define
the conditions for actual device operation
Recommended Operating Conditions
Symbol
V
CC
V
IH
V
IL
I
OH
I
OL
T
A
Parameter
Min
Supply Voltage
High Level Input Voltage
Low Level Input Voltage
High Level Output Current
Low Level Output Current
Free Air Operating Temperature
b
55
DM54LS151
Nom
5
Max
55
Min
4 75
2
07
b
0 4
DM74LS151
Nom
5
Max
5 25
Units
V
V
08
b
0 4
45
2
V
mA
mA
C
4
125
0
8
70
Electrical Characteristics
Symbol
V
I
V
OH
Parameter
Input Clamp Voltage
High Level Output
Voltage
Low Level Output
Voltage
over recommended operating free air temperature range (unless otherwise noted)
Conditions
V
CC
e
Min I
I
e b
18 mA
V
CC
e
Min
V
IL
e
Max
V
CC
e
Min
V
IL
e
Max
I
OH
e
Max
V
IH
e
Min
I
OL
e
Max
V
IH
e
Min
DM54
DM74
DM54
DM74
DM74
25
27
34
34
0 25
0 35
0 25
04
05
04
01
20
b
0 4
Min
Typ
(Note 1)
Max
b
1 5
Units
V
V
V
OL
V
I
OL
e
4 mA V
CC
e
Min
I
I
I
IH
I
IL
I
OS
Input Current
Input Voltage
Max
V
CC
e
Max V
I
e
7V
V
CC
e
Max V
I
e
2 7V
V
CC
e
Max V
I
e
0 4V
V
CC
e
Max
(Note 2)
V
CC
e
Max (Note 3)
mA
mA
mA
mA
mA
High Level Input Current
Low Level Input Current
Short Circuit
Output Current
Supply Current
DM54
DM74
b
20
b
20
b
100
b
100
I
CC
6
10
Note 1
All typicals are at V
CC
e
5V T
A
e
25 C
Note 2
Not more than one output should be shorted at a time and the duration should not exceed one second
Note 3
I
CC
is measured with all outputs open strobe and data select inputs at 4 5V and all other inputs open
2
Switching Characteristics
at V
CC
e
5V and T
A
e
25 C (See Section 1 for Test Waveforms and Output Load)
Symbol
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
Parameter
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
From (Input)
To (output)
Select
(4 Levels) to Y
Select
(4 Levels) to Y
Select
(3 Levels) to W
Select
(3 Levels) to W
Strobe
to Y
Strobe
to Y
Strobe
to W
Strobe
to W
D0 thru D7
to Y
D0 thru D7
to Y
D0 thru D7
to W
D0 thru D7
to W
R
L
e
2 kX
C
L
e
15 pF
Min
Max
43
30
23
32
42
32
24
30
32
26
21
20
C
L
e
50 pF
Min
Max
46
36
25
40
44
40
27
36
35
33
25
27
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Units
Logic Diagram
LS151
Address Buffers for 54LS151 74LS151
TL F 6392 – 3
TL F 6392 – 2
See Address Buffers to the Right
3
Physical Dimensions
inches (millimeters)
Ceramic Leadless Chip Carrier Package (E)
Order Number 54LS151LMQB
NS Package Number E20A
Ceramic Dual-In-Line Package (J)
Order Number 54LS151DMQB or DM54LS151J
NS Package Number J16A
4
Physical Dimensions
inches (millimeters) (Continued)
16-Lead Small Outline Molded Package (M)
Order Number DM74LS151M
NS Package Number M16A
16-Lead Molded Dual-In-Line Package (N)
Order Number DM74LS151N
NS Package Number N16E
5
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