NSC DM74LS157 Quad 2-line to 1-line data selectors/multiplexer Datasheet

54LS157/DM54LS157/DM74LS157,
54LS158/DM54LS158/DM74LS158
Quad 2-Line to 1-Line Data Selectors/Multiplexers
General Description
Features
These data selectors/multiplexers contain inverters and
drivers to supply full on-chip data selection to the four output 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. The LS157 presents true data whereas the LS158
presents inverted data to minimize propagation delay time.
Y
Applications
Y
Y
Y
Y
Y
Y
Y
Expand any data input point
Multiplex dual data buses
Generate four functions of two variables (one variable
is common)
Source programmable counters
Buffered inputs and outputs
Typical Propagation Time
LS157 9 ns
LS158 7 ns
Typical Power Dissipation
LS157 49 mW
LS158 24 mW
Alternate
Military/Aerospace
device
(54LS157,
54LS158) is available. Contact a National Semiconductor Sales Office/Distributor for specifications.
Connection Diagrams
Dual-In-Line Package
Dual-In-Line Package
TL/F/6396 – 2
TL/F/6396 – 1
Order Number 54LS158DMQB, 54LS158FMQB,
54LS158LMQB, DM54LS158J, DM54LS158W,
DM74LS158M or DM74LS158N
See NS Package Number E20A, J16A,
M16A, N16E or W16A
Order Number 54LS157DMQB, 54LS157FMQB,
54LS157LMQB, DM54LS157J, DM54LS157W,
DM74LS157M or DM74LS157N
See NS Package Number E20A, J16A,
M16A, N16E or W16A
Function Table
Inputs
Output Y
Strobe
Select
A
B
LS157
LS158
H
L
L
L
L
X
L
L
H
H
X
L
H
X
X
X
X
X
L
H
L
L
H
L
H
H
H
L
H
L
H e High Level, L e Low Level, X e Don’t Care
C1995 National Semiconductor Corporation
TL/F/6396
RRD-B30M105/Printed in U. S. A.
54LS157/DM54LS157/DM74LS157, 54LS158/DM54LS158/DM74LS158
Quad 2-Line to 1-Line Data Selectors/Multiplexers
June 1989
Absolute Maximum Ratings (Note)
Note: The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaranteed. 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.
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
Storage Temperature Range
b 65§ C to a 150§ C
Recommended Operating Conditions
Symbol
DM54LS157
Parameter
VCC
Supply Voltage
VIH
High Level Input Voltage
VIL
Low Level Input Voltage
IOH
High Level Output Current
IOL
Low Level Output Current
TA
Free Air Operating Temperature
DM74LS157
Units
Min
Nom
Max
Min
Nom
Max
4.5
5
5.5
4.75
5
5.25
2
2
V
0.7
0.8
V
b 0.4
b 0.4
mA
4
b 55
V
125
0
8
mA
70
§C
Max
Units
b 1.5
V
’LS157 Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
VI
VOH
VOL
II
IIH
IIL
IOS
ICC
Parameter
Conditions
Min
Typ
(Note 1)
Input Clamp Voltage
VCC e Min, II e b18 mA
High Level Output
Voltage
VCC e Min, IOH e Max
VIL e Max, VIH e Min
Low Level Output
Voltage
VCC e Min, IOL e Max
VIL e Max, VIH e Min
DM54
0.25
0.4
DM74
0.35
0.5
IOL e 4 mA, VCC e Min
DM74
0.25
0.4
Input Current @ Max
Input Voltage
VCC e Max
VI e 7V
S or G
0.2
A or B
0.1
High Level Input
Current
VCC e Max
VI e 2.7V
S or G
40
A or B
20
Low Level Input
Current
VCC e Max
VI e 0.4V
S or G
b 0.8
A or B
b 0.4
Short Circuit
Output Current
VCC e Max
(Note 2)
Supply Current
VCC e Max (Note 3)
DM54
2.5
3.4
DM74
2.7
3.4
DM54
b 20
b 100
DM74
b 20
b 100
9.7
Note 1: All typicals are at VCC e 5V, TA 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: ICC is measured with 4.5V applied to all inputs and all outputs open.
2
V
16
V
mA
mA
mA
mA
mA
’LS157 Switching Characteristics
at VCC e 5V and TA e 25§ C (See Section 1 for Test Waveforms and Output Load)
Symbol
RL e 2 kX
From (Input)
To (Output)
Parameter
CL e 15 pF
Min
CL e 50 pF
Max
Min
Units
Max
tPLH
Propagation Delay Time
Low to High Level Output
Data
to Y
14
18
ns
tPHL
Propagation Delay Time
High to Low Level Output
Data
to Y
14
23
ns
tPLH
Propagation Delay Time
Low to High Level Output
Strobe
to Y
20
24
ns
tPHL
Propagation Delay Time
High to Low Level Output
Strobe
to Y
21
30
ns
tPLH
Propagation Delay Time
Low to High Level Output
Select
to Y
23
28
ns
tPHL
Propagation Delay Time
High to Low Level Output
Select
to Y
27
32
ns
Recommended Operating Conditions
Symbol
DM54LS158
Parameter
DM74LS158
Units
Min
Nom
Max
Min
Nom
Max
4.5
5
5.5
4.75
5
5.25
V
0.7
0.8
V
VCC
Supply Voltage
VIH
High Level Input Voltage
VIL
Low Level Input Voltage
IOH
High Level Output Current
b 0.4
b 0.4
mA
IOL
Low Level Output Current
4
8
mA
TA
Free Air Operating Temperature
70
§C
Max
Units
b 1.5
V
2
2
b 55
125
V
0
’LS158 Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
Typ
(Note 1)
VI
Input Clamp Voltage
VCC e Min, II e b18 mA
VOH
High Level Output
Voltage
VCC e Min, IOH e Max
VIL e Max, VIH e Min
DM54
2.5
3.4
DM74
2.7
3.4
Low Level Output
Voltage
VCC e Min, IOL e Max
VIL e Max, VIH e Min
DM54
0.25
0.4
DM74
0.35
0.5
IOL e 4 mA, VCC e Min
DM74
0.25
0.4
Input Current @ Max
Input Voltage
VCC e Max
VI e 7V
S or G
0.2
A or B
0.1
High Level Input
Current
VCC e Max
VI e 2.7V
S or G
40
A or B
20
Low Level Input
Current
VCC e Max
VI e 0.4V
S or G
b 0.8
A or B
b 0.4
Short Circuit
Output Current
VCC e Max
(Note 2)
Supply Current
VCC e Max (Note 3)
VOL
II
IIH
IIL
IOS
ICC
DM54
b 20
b 100
DM74
b 20
b 100
4.8
Note 1: All typicals are at VCC e 5V, TA 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: ICC is measured with 4.5V applied to all inputs and all outputs open.
3
V
8
V
mA
mA
mA
mA
mA
’LS158 Switching Characteristics
at VCC e 5V and TA e 25§ C (See Section 1 for Test Waveforms and Output Load)
Symbol
Parameter
From (Input)
To (Output)
RL e 2 kX
CL e 15 pF
Min
Max
CL e 50 pF
Min
Units
Max
tPLH
Propagation Delay Time
Low to High Level Output
Data
to Y
12
18
ns
tPHL
Propagation Delay Time
High to Low Level Output
Data
to Y
12
21
ns
tPLH
Propagation Delay Time
Low to High Level Output
Strobe
to Y
17
23
ns
tPHL
Propagation Delay Time
High to Low Level Output
Strobe
to Y
18
28
ns
tPLH
Propagation Delay Time
Low to High Level Output
Select
to Y
20
24
ns
tPHL
Propagation Delay Time
High to Low Level Output
Select
to Y
24
36
ns
Logic Diagrams
LS157
LS158
TL/F/6396 – 4
TL/F/6396–3
4
5
Physical Dimensions inches (millimeters)
Ceramic Leadless Chip Carrier Package (E)
Order Number 54LS157LMQB or 54LS158LMQB
NS Package Number E20A
16-Lead Ceramic Dual-In-Line Package (J)
Order Number 54LS157DMQB, 54LS158DMQB, DM54LS157J or DM54LS158J
NS Package Number J16A
6
Physical Dimensions inches (millimeters) (Continued)
16-Lead Small Outline Molded Package (M)
Order Number DM74LS157M or DM74LS158M
NS Package Number M16A
16-Lead Molded Dual-In-Line Package (N)
Order Number DM74LS157N or DM74LS158N
NS Package Number N16E
7
54LS157/DM54LS157/DM74LS157, 54LS158/DM54LS158/DM74LS158
Quad 2-Line to 1-Line Data Selectors/Multiplexers
Physical Dimensions inches (millimeters) (Continued)
16-Lead Ceramic Flat Package (W)
Order Number 54LS157FMQB, 54LS158FMQB, DM54LS157W or DM54LS158W
NS Package Number W16A
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