DUAL 1-OF-4 DECODER/DEMULTIPLEXER
MC74AC139 MC74ACT139
Dual 1ĆofĆ4 Decoder/Demultiplexer
The MC74AC139/74ACT139 is a high-speed, dual 1-of-4 decoder/demu...
Description
MC74AC139 MC74ACT139
Dual 1ĆofĆ4 Decoder/Demultiplexer
The MC74AC139/74ACT139 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 MC74AC139/74ACT139 can be used as a function generator providing four minterms of two variables.
Multifunction Capability Two Completely Independent 1-of-4 Decoders Active LOW Mutually Exclusive Outputs Outputs Source/Sink 24 mA ′ACT139 Has TTL Compatible Inputs
VCC Eb A0b A1b O0b O1b O2b O3b 16 15 14 13 12 11 10 9
DUAL 1-OF-4 DECODER/DEMULTIPLEXER
N SUFFIX CASE 648-08
PLASTIC
12345678 Ea A0a A1a O0a O1a O2a O3a GND
TRUTH TABLE
Inputs
E A0 A1 O0
HXX
LLL LHL LLH LHH
H
L H H H
H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial
Outputs
O1 O2
HH HH LH HL HH
O3
H H H H L
PI...
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