SN74LS139D
MOTOROLA SN74LS139D, SN74LS139DR2, SN74LS139M, SN74LS139MEL, SN74LS139ML1 Datasheet
...
Semiconductor Components Industries, LLC, 1999
December, 1999 – Rev. 6
1 Publication Order Number:
SN74LS139/D
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.
• 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
GUARANTEED OPERATING RANGES
Symbol Parameter Min Typ Max Unit
V
CC
Supply Voltage 4.75 5.0 5.25 V
T
A
Operating Ambient
T emperature Range
0 25 70 °C
I
OH
Output Current – High –0.4 mA
I
OL
Output Current – Low 8.0 mA
LOW
POWER
SCHOTTKY
Device Package Shipping
ORDERING INFORMATION
SN74LS139N 16 Pin DIP 2000 Units/Box
SN74LS139D 16 Pin
SOIC
D SUFFIX
CASE 751B
http://onsemi.com
2500/Tape & Reel
PLASTIC
N SUFFIX
CASE 648
16
1
16
1
SN74LS139
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2
CONNECTION DIAGRAM DIP (TOP VIEW)
Address Inputs
Enable (Active LOW) Input
Active LOW Outputs
A
0
, A
1
E
O
0
– O
3
0.5 U.L.
0.5 U.L.
10 U.L.
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.
HIGH LOW
(Note a)LOADING
PIN NAMES
NOTE:
The Flatpak version has the same
pinouts (Connection Diagram) as
the Dual In-Line Package.
14 13 12 1 1 10 9
123456
7
16 15
8
V
CC
E
b
GND
A
0b
A
1b
O
0b
O
1b
O
2b
O
3b
E
a
O
0a
O
1a
A
0a
A
1a
V
CC
= PIN 16
GND = PIN 8
O
1
123 151413
4 5 6 7 12 11 10 9
EA
0
A
1
DECODER a DECODER b
O
0
O
2
O
3
EA
0
A
1
O
2a
O
3a
O
1
O
0
O
2
O
3
LOGIC SYMBOL
SN74LS139
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3
LOGIC DIAGRAM
V
CC
= PIN 16
GND = PIN 8
= PIN NUMBERS
A
0a
A
1a
E
a
A
0b
O
3a
O
0b
O
1b
O
2b
O
3b
O
1a
O
2a
E
b
A
1b
O
0a
12 116 74 5 10 9
1 2 3 15 14 13
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 OUTPUTS
E A
0
A
1
O
0
O
1
O
2
O
3
H X X H H H H
L LLLHHH
L HLHLHH
L LHHHLH
L HHHHHL
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Figure a
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
2
O
3
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
2
O
3
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