DUAL 1-OF-4 DECODER/
DEMULTIPLEXER
The LSTTL/MSI SN54/74LS139 is a high speed Dual 1-of-4 Decoder /De-
multiplexer. 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 Motorola TTL families.
SN54/74LS139
DUAL 1-OF-4 DECODER/
DEMULTIPLEXER
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
CONNECTION DIAGRAM DIP
(TOP VIEW)
VCC
16
Eb
15
AOb
14
A1b
13
O0b
12
O1b
11
O2b
10
O3b
9
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
J SUFFIX
CERAMIC
CASE 620-09
16
1
16
1
N SUFFIX
PLASTIC
CASE 648-08
1
Ea
2
A0a
3
A1a
4
O0a
5
O1a
6
O2a
7
O3a
8
GND
16
1
D SUFFIX
SOIC
CASE 751B-03
PIN NAMES
A0, A1
E
O0 – O3
Address Inputs
Enable (Active LOW) Input
Active LOW Outputs (Note b)
LOADING
(Note a)
HIGH
0.5 U.L.
0.5 U.L.
10 U.L.
LOW
0.25 U.L.
0.25 U.L.
5 (2.5) U.L.
ORDERING INFORMATION
SN54LSXXXJ
SN74LSXXXN
SN74LSXXXD
Ceramic
Plastic
SOIC
NOTES:
a) 1 TTL Unit Load (U.L.) = 40
µA
HIGH/1.6 mA LOW.
b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74)
Temperature Ranges.
LOGIC DIAGRAM
Ea
1
2
LOGIC SYMBOL
1
2 3
15
14 13
A0a A1a
3
15
Eb
14
A0b A1b
13
E
A0 A1
E
A0 A1
DECODER a
O0 O1 O2 O3
DECODER b
O0 O1 O2 O3
VCC = PIN 16
GND = PIN 8
= PIN NUMBERS
4
5
6
7
12 11 10 9
VCC = PIN 16
GND = PIN 8
4
5
6
7
12
11
10
9
O0a
O1a
O2a
O3a
O0b
O1b
O2b
O3b
FAST AND LS TTL DATA
5-235
MOTOROLA [ MOTOROLA, INC ]
