SN54LS139 Datasheet, PDF (1/5 Pages) Motorola, Inc – DUAL 1-OF-4 DECODER/ DEMULTIPLEXER

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.
• 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 Eb AOb A1b O0b O1b O2b O3b
16 15 14 13 12 11 10 9
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
1
2
3
4 56
78
Ea A0a A1a O0a O1a O2a O3a GND
PIN NAMES
LOADING (Note a)
HIGH
LOW
A0, A1
E
O0 – O3
Address Inputs
Enable (Active LOW) Input
Active LOW Outputs (Note b)
0.5 U.L.
0.5 U.L.
10 U.L.
0.25 U.L.
0.25 U.L.
5 (2.5) U.L.
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
A0a A1a
2
3
Eb
15
A0b A1b
14
13
VCC = PIN 16
GND = PIN 8
= PIN NUMBERS
4
5
6
7
12
11
10
9
O0a O1a O2a O3a O0b O1b O2b O3b
FAST AND LS TTL DATA
5-235
SN54/74LS139
DUAL 1-OF-4 DECODER/
DEMULTIPLEXER
LOW POWER SCHOTTKY
16
1
J SUFFIX
CERAMIC
CASE 620-09
16
1
N SUFFIX
PLASTIC
CASE 648-08
16
1
D SUFFIX
SOIC
CASE 751B-03
ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
SN74LSXXXD SOIC
LOGIC SYMBOL
1
23
15 14 13
E
A0 A1
DECODER a
O0 O1 O2 O3
E
A0 A1
DECODER b
O0 O1 O2 O3
4 56 7
12 11 10 9
VCC = PIN 16
GND = PIN 8