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74HCT138 3-to-8 Decoder
74HCT138
Texas Instrumentsic logic
The 74HCT138 is a 3-to-8 line decoder designed for high-speed memory decoding and data routing applications.
In stock
Specifications
3- Operating Voltage
- 4.5 V to 5.5 V
- Supply Current
- 80-µA max
- Interface
- TTL-compatible
Pinout
14Low 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 | Binary-select input |
| B | Input B | GPIO | Binary-select input |
| C | Input C | GPIO | Binary-select input |
| G1 | Enable 1 | GPIO | Active-low enable input |
| G2A | Enable 2A | GPIO | Active-low enable input |
| G2B | Enable 2B | GPIO | Active-low enable input |
| Y0 | Output Y0 | GPIO | 8-bit output line |
| Y1 | Output Y1 | GPIO | 8-bit output line |
| Y2 | Output Y2 | GPIO | 8-bit output line |
| Y3 | Output Y3 | GPIO | 8-bit output line |
| Y4 | Output Y4 | GPIO | 8-bit output line |
| Y5 | Output Y5 | GPIO | 8-bit output line |
| Y6 | Output Y6 | GPIO | 8-bit output line |
| Y7 | Output Y7 | GPIO | 8-bit output line |
Interactive pinout
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74HCT138
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