National Semiconductor 54157, DM54157, DM74157 Technical data
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54157/DM54157/DM74157
Quad 2-Line to 1-Line Data Selectors/Multiplexers
54157/DM54157/DM74157 Quad 2-Line to 1-Line Data Selectors/Multiplexers
June 1989
General Description
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.
Applications
Y
Expand any data input point
Y
Multiplex dual data buses
Y
Generate four functions of two variables (one variable
is common)
Y
Source programmable counters
Connection Diagram
Dual-In-Line Package
Features
Y
Buffered inputs and outputs
Y
Typical propagation time 9 ns
Y
Typical power dissipation 150 mW
Y
Alternate Military/Aerospace device (54157) is available. Contact a National Semiconductor Sales Office/
Distributor for specifications.
TL/F/6550– 1
Order Number 54157DMQB, 54157FMQB, DM54157J, DM54157W or DM74157N
See NS Package Number J16A, N16E or W16A
Function Table
Inputs
Strobe Select A B
HXXXL
LLLXL
LLHXH
LHXLL
LHXHH
e
H
High Level, LeLow Level, XeDon’t Care
C
1995 National Semiconductor Corporation RRD-B30M105/Printed in U. S. A.
TL/F/6550
Output Y
Absolute Maximum Ratings (Note)
The ‘‘Absolute Maximum Ratings’’ are those values
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Supply Voltage 7V
Input Voltage 5.5V
Operating Free Air Temperature Range
DM54 and 54
DM74 0
Storage Temperature Range
b
55§Ctoa125§C
Ctoa70§C
§
b
65§Ctoa150§C
Note:
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.
Recommended Operating Conditions
Symbol Parameter
V
CC
V
IH
V
IL
I
OH
I
OL
T
A
Supply Voltage 4.5 5 5.5 4.75 5 5.25 V
High Level Input Voltage 2 2 V
Low Level Input Voltage 0.8 0.8 V
High Level Output Current
Low Level Output Current 16 16 mA
Free Air Operating Temperature
DM54157 DM74157
Min Nom Max Min Nom Max
b
0.8
b
55 125 0 70
b
Units
0.8 mA
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol Parameter Conditions Min
e
V
I
V
OH
V
OL
I
I
I
IH
I
IL
I
OS
I
CC
Note 1: All typicals are at V
Note 2: Not more than one output should be shorted at a time.
Note 3: I
Input Clamp Voltage V
High Level Output V
Voltage V
Low Level Output V
Voltage V
Input Current@Max V
Input Voltage
High Level Input Current V
Low Level Input Current V
Short Circuit V
Output Current (Note 2)
Supply Current V
e
e
5V, T
CC
is measured with 4.5V applied to all inputs and all outputs open.
CC
25§C.
A
CC
CC
IL
CC
IH
CC
CC
CC
CC
CC
e
e
eb
Min, I
e
Min, I
Max, V
e
Min, I
Min, V
e
Max, V
e
Max, V
e
Max, V
e
Max DM54
e
Max (Note 3) 30 48 mA
12 mA
I
e
Max
OH
e
Min
IH
e
Max
OL
e
Max
IL
e
5.5V
I
e
2.4V 40 mA
I
e
0.4V
I
DM74
b
b
2.4 3.4 V
20
18
Typ
(Note 1)
Max Units
b
1.5 V
0.4 V
1mA
b
1.6 mA
b
55
b
55
mA
C
§
2
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