DM74LS154 4-Line to 16-Line Decoder/Demultiplexer
August 1986
Revised March 2000
DM74LS154
4-Line to 16-Line Decoder/Demultiplexer
General Description
Each of these 4-line-to-16-line decoders utilizes TTL cir-
cuitry to decode four binary-coded inputs into one of six-
teen mutually exclusive outputs when both the strobe
inputs, G1 and G2, are LOW. The demultiplexing function
is performed by using the 4 input lines to address the out-
put line, passing data from one of the strobe inputs with the
other strobe input LOW. When either strobe input is HIGH,
all outputs are HIGH. These demultiplexers are ideally
suited for implementing high-performance memory decod-
ers. All inputs are buffered and input clamping diodes are
provided to minimize transmission-line effects and thereby
simplify system design.
Features
s
Decodes 4 binary-coded inputs into one of 16 mutually
exclusive outputs
s
Performs the demultiplexing function by distributing data
from one input line to any one of 16 outputs
s
Input clamping diodes simplify system design
s
High fan-out, low-impedance, totem-pole outputs
s
Typical propagation delay
3 levels of logic
Strobe
23 ns
19 ns
s
Typical power dissipation 45 mW
Ordering Code:
Order Number
DM74LS154WM
DM74LS154N
Package Number
M24B
N24A
Package Description
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-010, 0.600 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Logic Diagram
© 2000 Fairchild Semiconductor Corporation
DS006394
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DM74LS154
Function Table
Inputs
G1
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
H
G2
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
L
H
D
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
X
X
X
C
L
L
L
L
H
H
H
H
L
L
L
L
H
H
H
H
X
X
X
B
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
X
X
X
A
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
X
X
X
0
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
1
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
2
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
3
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
4
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
5
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
6
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
7
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
Outputs
8
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
9
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
10
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
11
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
12
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
13
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
14
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
15
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
=
HIGH Level
L
=
Low Level
X
=
Don’t Care
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2
DM74LS154
Absolute Maximum Ratings
(Note 1)
Supply Voltage
Input Voltage
Operating Free Air Temperature Range
Storage Temperature Range
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
4.75
2
0.8
−0.4
8
70
Nom
5
Max
5.25
Units
V
V
V
mA
mA
°C
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
V
I
V
OH
V
OL
Parameter
Input Clamp Voltage
HIGH Level
Output Voltage
LOW Level
Output Voltage
I
I
I
IH
I
IL
I
OS
I
CC
Input Current @ Max Input Voltage
HIGH Level Input Current
LOW Level Input Current
Short Circuit Output Current
Supply Current
Conditions
V
CC
=
Min, I
I
= −18
mA
V
CC
=
Min, I
OH
=
Max
V
IL
=
Max, V
IH
=
Min
V
CC
=
Min, I
OL
=
Max
V
IL
=
Max, V
IH
=
Min
I
OL
=
4 mA, V
CC
=
Min
V
CC
=
Max, V
I
=
7V
V
CC
=
Max, V
I
=
2.7V
V
CC
=
Max, V
I
=
0.4V
V
CC
=
Max (Note 3)
V
CC
=
Max (Note 4)
−20
9
2.7
3.4
0.25
0.35
0.25
0.4
0.5
0.4
0.1
20
−0.4
−100
14
mA
µA
mA
mA
mA
V
Min
Typ
(Note 2)
Max
−1.5
Units
V
V
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 all outputs OPEN and all inputs GROUNDED.
Switching Characteristics
at V
CC
=
5V and T
A
=
25°C
From (Input)
Symbol
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
To (Output)
C
L
=
15 pF
Min
Data to Output
Data to Output
Strobe to Output
Strobe to Output
Max
30
30
20
25
R
L
=
2 kΩ
C
L
=
50 pF
Min
Max
35
35
25
35
ns
ns
ns
ns
Units
3
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DM74LS154
Physical Dimensions
inches (millimeters) unless otherwise noted
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
Package Number M24B
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4
DM74LS154 4-Line to 16-Line Decoder/Demultiplexer
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-010, 0.600 Wide
Package Number N24A
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.
5
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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