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Электронный компонент: 54157DMQB

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TL F 6550
54157DM54157DM74157
Quad
2-Line
to
1-Line
Data
SelectorsMultiplexers
June 1989
54157 DM54157 DM74157
Quad 2-Line to 1-Line Data Selectors Multiplexers
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
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
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 avail-
able Contact a National Semiconductor Sales Office
Distributor for specifications
Connection Diagram
Dual-In-Line Package
TL F 6550 1
Order Number 54157DMQB 54157FMQB DM54157J DM54157W or DM74157N
See NS Package Number J16A N16E or W16A
Function Table
Inputs
Output Y
Strobe
Select
A
B
H
X
X
X
L
L
L
L
X
L
L
L
H
X
H
L
H
X
L
L
L
H
X
H
H
H
e
High Level L
e
Low Level X
e
Don't Care
C1995 National Semiconductor Corporation
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
5 5V
Operating Free Air Temperature Range
DM54 and 54
b
55 C to
a
125 C
DM74
0 C to
a
70 C
Storage Temperature Range
b
65 C to
a
150 C
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
Parameter
DM54157
DM74157
Units
Min
Nom
Max
Min
Nom
Max
V
CC
Supply Voltage
4 5
5
5 5
4 75
5
5 25
V
V
IH
High Level Input Voltage
2
2
V
V
IL
Low Level Input Voltage
0 8
0 8
V
I
OH
High Level Output Current
b
0 8
b
0 8
mA
I
OL
Low Level Output Current
16
16
mA
T
A
Free Air Operating Temperature
b
55
125
0
70
C
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
(Note 1)
V
I
Input Clamp Voltage
V
CC
e
Min I
I
e b
12 mA
b
1 5
V
V
OH
High Level Output
V
CC
e
Min I
OH
e
Max
2 4
3 4
V
Voltage
V
IL
e
Max V
IH
e
Min
V
OL
Low Level Output
V
CC
e
Min I
OL
e
Max
0 4
V
Voltage
V
IH
e
Min V
IL
e
Max
I
I
Input Current
Max
V
CC
e
Max V
I
e
5 5V
1
mA
Input Voltage
I
IH
High Level Input Current
V
CC
e
Max V
I
e
2 4V
40
m
A
I
IL
Low Level Input Current
V
CC
e
Max V
I
e
0 4V
b
1 6
mA
I
OS
Short Circuit
V
CC
e
Max
DM54
b
20
b
55
mA
Output Current
(Note 2)
DM74
b
18
b
55
I
CC
Supply Current
V
CC
e
Max (Note 3)
30
48
mA
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
Note 3
I
CC
is measured with 4 5V applied to all inputs and all outputs 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
Parameter
From (Input)
R
L
e
400X C
L
e
15 pF
Units
To (Output)
Min
Max
t
PLH
Propagation Delay Time
Data
14
ns
Low to High Level Output
to Y
t
PHL
Propagation Delay Time
Data
14
ns
High to Low Level Output
to Y
t
PLH
Propagation Delay Time
Strobe
20
ns
Low to High Level Output
to Y
t
PHL
Propagation Delay Time
Strobe
21
ns
High to Low Level Output
to Y
t
PLH
Propagation Delay Time
Select
23
ns
Low to High Level Output
to Y
t
PHL
Propagation Delay Time
Select
27
ns
High to Low Level Output
to Y
Logic Diagram
157
TL F 6550 2
3
4
Physical Dimensions
inches (millimeters)
16-Lead Ceramic Dual-In-Line Package (J)
Order Number 54157W or DM54157J
NS Package Number J16A
16-Lead Molded Dual-In-Line Package (N)
Order Number DM74157N
NS Package Number N16E
5