Click to expand full text
MC74AC139, MC74ACT139
Dual 1-of-4 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.
Features
• Multifunctional Capability • Two Completely Independent 1−of−4 Decoders • Active LOW Mutually Exclusive Outputs • Outputs Source/Sink 24 mA • ′ACT139 Has TTL Compatible Inputs • These are Pb−Free Devices
VCC Eb A0b A1b O0b O1b O2b O3b 16 15 14 13 12 11 10 9
12345678 Ea A0a A1a O0a O1a O2a O3a GND
Figure 1.
MC74ACT139 Datasheet
