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74HCT139 Dual 2-to-4 Decoder
74HCT139
Texas Instrumentsic logic
The 74HCT139 is a dual 2-to-4 decoder/demultiplexer designed for high-speed memory decoding or data routing applications.
In stock
Specifications
3- Operating Voltage
- 4.5 V to 5.5 V
- Supply Current
- 80-µA max ICC
- Interface
- TTL-compatible inputs, open-collector outputs
Pinout
8Low source legibility.The original manufacturer datasheet for this part was difficult to read, so this pinout may be incomplete or imperfect. Always confirm against the specific manufacturer’s datasheet before wiring.
| Pin | Name | Functions | Notes |
|---|---|---|---|
| A | Input A | GPIO | Input to the first decoder |
| B | Input B | GPIO | Input to the second decoder |
| G1 | Enable 1 | GPIO | Enable input for the first decoder |
| G2 | Enable 2 | GPIO | Enable input for the second decoder |
| Y0 | Output Y0 | GPIO | Output of the first decoder when enabled and A = 1, B = 0 |
| Y1 | Output Y1 | GPIO | Output of the second decoder when enabled and A = 1, B = 0 |
| Y2 | Output Y2 | GPIO | Output of the first decoder when enabled and A = 0, B = 1 |
| Y3 | Output Y3 | GPIO | Output of the second decoder when enabled and A = 0, B = 1 |
Interactive pinout
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74HCT139
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