74LS139D Decoder/Demultiplexer
74LS139D is a 2 to 4 decoder/demultiplexer with low driven outputs.
The active LOW Enable ~G input can be used as data input line in demultiplexing applications. The circuit can also be used as a function generator, providing all four minterms of four variables.
Function table
| Inputs | Outputs | |||||
|---|---|---|---|---|---|---|
| Enable ~G | SELECT | |||||
| B | A | Y0 | Y1 | Y2 | Y3 | |
| H | X | X | H | H | H | H |
| L | L | L | L | H | H | H |
| L | L | H | H | L | H | H |
| L | H | L | H | H | L | H |
| L | H | H | H | H | H | L |
H = HIGH Level
L = LOW Level
X = Don't Care
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