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74LS138 3-to-8 Decoder
74LS138
Texas Instrumentsic logic
The 74LS138 is a 3-to-8 line decoder/demultiplexer with active-high outputs.
In stock
Specifications
3- Operating Voltage
- 5 V to 12 V, typical 5.0 V to 5.5 V for CMOS versions.
- Supply Current
- ≤30 µA (typical)
- Package
- LCCC, CFP, CDIP
Pinout
16Low 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 |
|---|---|---|---|
| 1 | A0 | GPIO | Input A0 |
| 2 | A1 | GPIO | Input A1 |
| 3 | A2 | GPIO | Input A2 |
| 4 | G0 | GPIO | Output G0 |
| 5 | G1 | GPIO | Output G1 |
| 6 | G2 | GPIO | Output G2 |
| 7 | G3 | GPIO | Output G3 |
| 8 | G4 | GPIO | Output G4 |
| 9 | G5 | GPIO | Output G5 |
| 10 | G6 | GPIO | Output G6 |
| 11 | G7 | GPIO | Output G7 |
| 12 | VCC | POWER | Power supply |
| 13 | G8 | GPIO | Output G8 |
| 14 | VSS | GND | Ground |
| 15 | OE | GPIO | Output enable |
| 16 | VCC | POWER | Power supply (repeated) |
Interactive pinout
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74LS138
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