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DM74ALS151 1 of 8 Line Data Selector/Multiplexer
April 1984
Revised February 2000
DM74ALS151
1 of 8 Line Data Selector/Multiplexer
General Description
This Data Selector/Multiplexer contains full on-chip decod-
ing to select one-of-eight data sources as a result of a
unique three-bit binary code at the Select inputs. Two com-
plementary outputs provide both inverting and non-invert-
ing buffer operation. A Strobe input is provided which,
when at the high level, disables all data inputs and forces
the Y output to the LOW state and the W output to the
HIGH state. The Select input buffers incorporate internal
overlap features to ensure that select input changes do not
cause invalid output transients.
Features
s
Advanced oxide-isolated, ion-implanted Schottky TTL
process
s
Switching performance is guaranteed over full tempera-
ture and V
CC
supply range
s
Pin and functional compatible with LS family counterpart
s
Improved output transient handling capability
Ordering Code:
Order Number
DM74ALS151M
DM74ALS151N
Package Number
M16A
N16E
Package Description
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Function 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
Y
S
H
L
L
L
L
L
L
L
L
L
D0
D1
D2
D3
D4
D5
D6
D7
H
D0
D1
D2
D3
D4
D5
D6
D7
W
Outputs
H
=
HIGH Level
L
=
LOW Level
X
=
Don't Care
D0 thru D7
=
the level of the respective D input
© 2000 Fairchild Semiconductor Corporation
DS006203
www.fairchildsemi.com
DM74ALS151
Logic Diagram
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2
DM74ALS151
Absolute Maximum Ratings
(Note 1)
Supply Voltage
Input Voltage
Operating Free Air Temperature Range
Storage Temperature Range
Typical
θ
JA
N Package
M Package
78.0°C/W
107.0°C/W
7V
7V
0°C to
+70°C
−65°C
to
+150°C
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
Symbol
V
CC
V
IH
V
IL
I
OH
I
OL
T
A
Supply Voltage
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Current
LOW Level Output Current
Free Air Operating Temperature
0
Parameter
Min
4.5
2
0.8
−2.6
24
70
Nom
5
Max
5.5
Units
V
V
V
mA
mA
°C
Electrical Characteristics
over recommended operating free-air temperature range. All typical values are measured at V
CC
=
5V, T
A
=
25°C.
Symbol
V
IK
V
OH
V
OL
I
I
I
IH
I
IL
I
O
I
CC
Parameter
Input Clamp Voltage
HIGH Level
Output Voltage
LOW Level Output Voltage
Input Current at Maximum
Input Voltage
HIGH Level Input Current
LOW Level Input Current
Output Drive Current
Supply Current
Conditions
V
CC
=
4.5V, I
IN
= −18
mA
V
CC
=
4.5V, I
OH
=
Max
I
OH
= −400 µA,
V
CC
=
4.5V to 5.5V
V
CC
=
4.5V
V
CC
=
5.5V, V
IN
=
7V
V
CC
=
5.5V, V
IN
=
2.7V
V
CC
=
5.5V, V
IN
=
0.4V
V
CC
=
5.5V, V
OUT
=
2.25V
V
CC
=
5.5V
All Inputs
=
4.5V
−30
7.5
I
OL
=
24 mA
2.4
V
CC
−
2
0.35
0.5
0.1
20
−0.1
−112
12
3.2
Min
Typ
Max
−1.5
Units
V
V
V
V
mA
µA
mA
mA
mA
3
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DM74ALS151
Switching Characteristics
over recommended operating free air temperature range
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
Conditions
V
CC
=
4.5V to 5.5V
C
L
=
50 pF
R
L
=
500Ω
From
Select
Select
Select
Select
Data
Data
Data
Data
Strobe
Strobe
Strobe
Strobe
To
Y
Y
W
W
Y
Y
W
W
Y
Y
W
W
Min
4
8
7
7
3
5
3
4
4
4
5
5
Max
18
24
24
23
10
15
15
15
18
19
19
23
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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4
