5-235
FAST AND LS TTL DATA
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)
C0049C0052 C0049C0051 C0049C0050 C0049C0049 C0049C0048 C0057
C0049 C0050 C0051 C0052 C0053 C0054 C0055
C0049C0054 C0049C0053
C0056
C0086
C0067C0067
C0069
C0097
C0069
C0098
C0065
C0079C0098
C0065
C0049C0098
C0079
C0048C0098
C0079
C0050C0098
C0079
C0049C0098
C0079
C0051C0098
C0065
C0048C0097
C0065
C0049C0097
C0079
C0048C0097
C0079
C0049C0097
C0079
C0050C0097
C0079
C0051C0097
C0071C0078C0068
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
PIN NAMES LOADING (Note a)
HIGH LOW
A
0
, A
1
E
O
0
–O
3
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.
SN54/74LS139
DUAL 1-OF-4 DECODER/
DEMULTIPLEXER
LOW POWER SCHOTTKY
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
16
1
16
1
ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
SN74LSXXXD SOIC
16
1
D SUFFIX
SOIC
CASE 751B-03
LOGIC SYMBOL
C0086
C0067C0067
C0061 C0080C0073C0078 C0049C0054
C0071C0078C0068 C0061 C0080C0073C0078 C0056
C0079
C0049
C0049 C0050 C0051 C0049C0053 C0049C0052 C0049C0051
C0052 C0053 C0054 C0055 C0049C0050 C0049C0049 C0049C0048 C0057
C0069 C0065
C0048
C0065
C0049
DECODER a DECODER b
C0079
C0048
C0079
C0049
C0079
C0050
C0079
C0051
C0079
C0048
C0079
C0050
C0079
C0051
C0069 C0065
C0048
C0065
C0049
LOGIC DIAGRAM
C0086
C0067C0067
C0061 C0080C0073C0078 C0049C0054
C0071C0078C0068 C0061 C0080C0073C0078 C0056
C0061 C0080C0073C0078 C0078C0085C0077C0066C0069C0082C0083
C0065
C0048C0097
C0065
C0049C0097
C0069
C0097
C0065
C0048C0098
C0079
C0051C0097
C0079
C0048C0098
C0079
C0049C0098
C0079
C0050C0098
C0079
C0051C0098
C0079
C0049C0097
C0079
C0050C0097
C0069
C0098
C0065
C0049C0098
C0079
C0048C0097
C0049 C0050
C0055
C0051
C0053C0052 C0054 C0057C0049C0048
C0049C0052
C0049C0049C0049C0050
C0049C0051C0049C0053