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2000 Fairchild Semiconductor Corporation
DS006468
www.fairchildsemi.com
August 1986
Revised April 2000
DM74S151
1-
of-
8
Dat
a
Se
lect
or/
M
u
l
t
i
pl
exer
wit
h
Compl
e
m
e
nt
ary
Outpu
t
s
DM74S151
1-of-8 Data Selector/Multiplexer
with Complementary Outputs
General Description
These data selectors/multiplexers contain full on-chip
decoding to select the desired data source. The
DM74S151 selects one-of-eight data sources. The
DM74S151 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 DM74S151 features complementary W and Y outputs.
Features
s
Select one-of-eight data lines
s
Performs parallel-to-serial conversion
s
Permits multiplexing from N lines to one line
s
Also for use as Boolean function generator
s
Typical average propagation delay time, data input to W
output 4.5 ns
s
Typical power dissipation 225 mW
Ordering Code:
Connection Diagram
Function Table
H
=
HIGH Level
L
=
LOW Level
X
=
Don't Care
D0, D1...D7
=
The level of the respective D input
Order Number
Package Number
Package Description
DM74S151N
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Inputs
Outputs
Select
Strobe
Y
W
C
B
A
S
X
X
X
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
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2
D
M
74S151
Logic Diagram
3
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DM74S151
Absolute Maximum Ratings
(Note 1)
Note 1: 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 tables are not guaranteed at the absolute maximum ratings.
The "Recommended Operating Conditions" table will define the conditions
for actual device operation.
Recommended Operating Conditions
Electrical Characteristics
over recommended operating free air temperature (unless otherwise noted)
Note 2: All typicals are at V
CC
=
5V, T
A
=
25
C.
Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 4: I
CC
is measured with the strobe and data select inputs at 4.5V, all other inputs and outputs OPEN.
Supply Voltage
7V
Input Voltage
5.5V
Operating Free Air Temperature Range
0
C to
+
70
C
Storage Temperature Range
-
65
C to
+
150
C
Symbol
Parameter
Min
Nom
Max
Units
V
CC
Supply Voltage
4.75
5
5.25
V
V
IH
HIGH Level Input Voltage
2
V
V
IL
LOW Level Input Voltage
0.8
V
I
OH
HIGH Level Output Current
-
1
mA
I
OL
LOW Level Output Current
20
mA
T
A
Free Air Operating Temperature
0
70
C
Symbol
Parameter
Conditions
Min
Typ
Max
Units
(Note 2)
V
I
Input Clamp Voltage
V
CC
=
Min, I
I
=
-
18 mA
-
1.2
V
V
OH
HIGH Level
V
CC
=
Min, I
OH
=
Max,
2.7
3.4
V
Output Voltage
V
IL
=
Max, V
IH
=
Min
V
OL
LOW Level
V
CC
=
Min, I
OL
=
Max
0.5
V
Output Voltage
V
IH
=
Min, V
IL
=
Max
I
I
Input Current @ Max Input Voltage
V
CC
=
Max, V
I
=
5.5V
1
mA
I
IH
HIGH Level Input Current
V
CC
=
Max, V
I
=
2.7V
50
A
I
IL
LOW Level Input Current
V
CC
=
Max, V
I
=
0.5V
-
2
mA
I
OS
Short Circuit Output Current
V
CC
=
Max (Note 3)
-
40
-
100
mA
I
CC
Supply Current
V
CC
=
Max (Note 4)
45
70
mA
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4
D
M
74S151
Switching Characteristics
at V
CC
=
5V and T
A
=
25
C
R
L
=
280
Symbol
Parameter
From (Input)
C
L
=
15 pF
C
L
=
50 pF
Units
To (Output)
Min
Max
Min
Max
t
PLH
Propagation Delay Time
Select to Y (4 Levels)
18
21
ns
LOW-to-HIGH Level Output
t
PHL
Propagation Delay Time
Select to Y (4 Levels)
18
21
ns
HIGH-to-LOW Level Output
t
PLH
Propagation Delay Time
Select to W (3 Levels)
15
18
ns
LOW-to-HIGH Level Output
t
PHL
Propagation Delay Time
Select to W (3 Levels)
13.5
17
ns
HIGH-to-LOW Level Output
t
PLH
Propagation Delay Time
Strobe to Y
16.5
19
ns
LOW-to-HIGH Level Output
t
PHL
Propagation Delay Time
Strobe to Y
18
21
ns
HIGH-to-LOW Level Output
t
PLH
Propagation Delay Time
Strobe to W
13
16
ns
LOW-to-HIGH Level Output
t
PHL
Propagation Delay Time
Strobe to W
12
16
ns
HIGH-to-LOW Level Output
t
PLH
Propagation Delay Time
D0 thru D7 to Y
12
15
ns
LOW-to-HIGH Level Output
t
PHL
Propagation Delay Time
D0 thru D7 to Y
12
15
ns
HIGH-to-LOW Level Output
t
PLH
Propagation Delay Time
D0 thru D7 to W
7
9
ns
LOW-to-HIGH Level Output
t
PHL
Propagation Delay Time
D0 thru D7 to W
7
10
ns
HIGH-to-LOW Level Output
5
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DM74S151
1-
of-
8
Dat
a
Se
lect
or/
M
u
l
t
i
pl
exer
wit
h
Compl
e
m
e
nt
ary
Outpu
t
s
Physical Dimensions
inches (millimeters) unless otherwise noted
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Package Number N16E
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
LIFE SUPPORT POLICY
FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be rea-
sonably expected to result in a significant injury to the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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