SN74LS139
Dual 1-of-4 Decoder/
Demultiplexer
The LSTTL/MSI SN74LS139 is a high speed Dual 1-of-4
Decoder/Demultiplexer. The device has two independent decoders,
each accepting two inputs and providing four mutually exclusive
active LOW Outputs. Each decoder has an active LOW Enable input
which can be used as a data input for a 4-output demultiplexer. Each
half of the LS139 can be used as a function generator providing all
four minterms of two variables. The LS139 is fabricated with the
Schottky barrier diode process for high speed and is completely
compatible with all ON Semiconductor TTL families.
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LOW
POWER
SCHOTTKY
•
•
•
•
•
•
Schottky Process for High Speed
Multifunction Capability
Two Completely Independent 1-of-4 Decoders
Active Low Mutually Exclusive Outputs
Input Clamp Diodes Limit High Speed Termination Effects
ESD > 3500 Volts
16
1
GUARANTEED OPERATING RANGES
Symbol
V
CC
T
A
I
OH
I
OL
Parameter
Supply Voltage
Operating Ambient
Temperature Range
Output Current – High
Output Current – Low
Min
4.75
0
Typ
5.0
25
Max
5.25
70
– 0.4
8.0
Unit
V
°C
mA
mA
16
PLASTIC
N SUFFIX
CASE 648
1
SOIC
D SUFFIX
CASE 751B
ORDERING INFORMATION
Device
SN74LS139N
SN74LS139D
Package
16 Pin DIP
16 Pin
Shipping
2000 Units/Box
2500/Tape & Reel
©
Semiconductor Components Industries, LLC, 1999
1
December, 1999 – Rev. 6
Publication Order Number:
SN74LS139/D
SN74LS139
CONNECTION DIAGRAM DIP
(TOP VIEW)
V
CC
16
E
b
15
A
0b
14
A
1b
13
O
0b
12
O
1b
11
O
2b
10
O
3b
9
NOTE:
The Flatpak version has the same
pinouts (Connection Diagram) as
the Dual In-Line Package.
1
E
a
2
A
0a
3
A
1a
4
O
0a
5
O
1a
6
O
2a
7
O
3a
8
GND
LOADING
(Note a)
PIN NAMES
A
0
, A
1
E
O
0
– O
3
Address Inputs
Enable (Active LOW) Input
Active LOW Outputs
HIGH
0.5 U.L.
0.5 U.L.
10 U.L.
LOW
0.25 U.L.
0.25 U.L.
5 U.L.
NOTES:
a) 1 TTL Unit Load (U.L.) = 40
m
A HIGH/1.6 mA LOW.
LOGIC SYMBOL
1
2 3
15
14 13
E
A
0
A
1
E
A
0
A
1
DECODER a
O
0
O
1
O
2
O
3
DECODER b
O
0
O
1
O
2
O
3
4 5 6 7
12 11 10 9
V
CC
= PIN 16
GND = PIN 8
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2
SN74LS139
LOGIC DIAGRAM
E
a
1
2
A
0a
A
1a
3
15
E
b
A
0b
A
1b
14
13
V
CC
= PIN 16
GND = PIN 8
= PIN NUMBERS
4
5
6
7
12
11
10
9
O
0a
O
1a
O
2a
O
3a
O
0b
O
1b
O
2b
O
3b
FUNCTIONAL DESCRIPTION
The LS139 is a high speed dual 1-of-4 decoder/
demultiplexer fabricated with the Schottky barrier diode
process. The device has two independent decoders, each of
which accept two binary weighted inputs (A
0
, A
1
) and
provide four mutually exclusive active LOW outputs
(O
0
– O
3
). Each decoder has an active LOW Enable (E).
When E is HIGH all outputs are forced HIGH. The enable
can be used as the data input for a 4-output demultiplexer
application.
Each half of the LS139 generates all four minterms of two
variables. These four minterms are useful in some
applications, replacing multiple gate functions as shown in
Fig. a, and thereby reducing the number of packages
required in a logic network.
TRUTH TABLE
INPUTS
E
H
L
L
L
L
A
0
X
L
H
L
H
A
1
X
L
L
H
H
O
0
H
L
H
H
H
OUTPUTS
O
1
H
H
L
H
H
O
2
H
H
H
L
H
O
3
H
H
H
H
L
E
A
0
A
1
E
A
0
A
1
E
A
0
A
1
E
A
0
A
1
O
0
E
A
0
A
1
E
A
0
A
1
E
A
0
A
1
E
A
0
A
1
O
0
O
1
O
1
O
2
O
2
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
O
3
O
3
Figure a
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3
SN74LS139
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE
(unless otherwise specified)
Limits
Symbol
V
IH
V
IL
V
IK
V
OH
Parameter
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH Voltage
2.7
– 0.65
3.5
0.25
V
O
OL
Output LOW Voltage
0.35
I
IH
I
IL
I
OS
I
CC
Input HIGH Current
Input LOW Current
Short Circuit Current (Note 1)
Power Supply Current
– 20
0.5
20
0.1
– 0.4
–100
11
V
µA
mA
mA
mA
mA
I
OL
= 8.0 mA
0.4
Min
2.0
0.8
– 1.5
Typ
Max
Unit
V
V
V
V
V
Test Conditions
Guaranteed Input HIGH Voltage for
All Inputs
Guaranteed Input LOW Voltage for
All Inputs
V
CC
= MIN, I
IN
= – 18 mA
V
CC
= MIN, I
OH
= MAX, V
IN
= V
IH
or V
IL
per Truth Table
I
OL
= 4.0 mA
V
CC
= V
CC
MIN,
V
IN
= V
IL
or V
IH
per Truth Table
V
CC
= MAX, V
IN
= 2.7 V
V
CC
= MAX, V
IN
= 7.0 V
V
CC
= MAX, V
IN
= 0.4 V
V
CC
= MAX
V
CC
= MAX
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS
(T
A
= 25°C)
Symbol
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
Parameter
Propagation Delay
Address to Output
Propagation Delay
Address to Output
Propagation Delay
Enable to Output
Levels of
Delay
2
2
3
3
2
2
Limits
Min
Typ
13
22
18
25
16
21
Max
20
33
29
38
24
32
Unit
ns
ns
ns
V
CC
= 5.0 V
C
L
= 15 pF
Test Conditions
AC WAVEFORMS
V
IN
t
PLH
1.3 V
V
OUT
V
IN
1.3 V
t
PHL
1.3 V
1.3 V
t
PHL
1.3 V
t
PLH
1.3 V
V
OUT
1.3 V
1.3 V
Figure 1.
Figure 2.
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4
SN74LS139
PACKAGE DIMENSIONS
N SUFFIX
PLASTIC PACKAGE
CASE 648–08
ISSUE R
–A–
16
9
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.
5. ROUNDED CORNERS OPTIONAL.
DIM
A
B
C
D
F
G
H
J
K
L
M
S
INCHES
MIN
MAX
0.740
0.770
0.250
0.270
0.145
0.175
0.015
0.021
0.040
0.70
0.100 BSC
0.050 BSC
0.008
0.015
0.110
0.130
0.295
0.305
0
_
10
_
0.020
0.040
MILLIMETERS
MIN
MAX
18.80
19.55
6.35
6.85
3.69
4.44
0.39
0.53
1.02
1.77
2.54 BSC
1.27 BSC
0.21
0.38
2.80
3.30
7.50
7.74
0
_
10
_
0.51
1.01
B
1
8
F
S
C
L
–T–
H
G
D
16 PL
SEATING
PLANE
K
J
T A
M
M
0.25 (0.010)
M
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5
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