Interactive chip reference
74HC138 DIP-16 pinout
74HC138 16-pin DIP-16 pinout. 3-to-8 line decoder/demultiplexer with active-low outputs
Pin reference
| Pin | Name | Function | Group |
|---|---|---|---|
| 1 | A0 | Address input bit 0 (LSB) | input |
| 2 | A1 | Address input bit 1 | input |
| 3 | A2 | Address input bit 2 (MSB) | input |
| 4 | /E1 | Enable G1 (active LOW) | control |
| 5 | /E2 | Enable G2A (active LOW) | control |
| 6 | E3 | Enable G2B (active HIGH) | control |
| 7 | /Y7 | Decoded output 7 (active LOW) | output |
| 8 | GND | Ground reference | ground |
| 9 | /Y6 | Decoded output 6 (active LOW) | output |
| 10 | /Y5 | Decoded output 5 (active LOW) | output |
| 11 | /Y4 | Decoded output 4 (active LOW) | output |
| 12 | /Y3 | Decoded output 3 (active LOW) | output |
| 13 | /Y2 | Decoded output 2 (active LOW) | output |
| 14 | /Y1 | Decoded output 1 (active LOW) | output |
| 15 | /Y0 | Decoded output 0 (active LOW) | output |
| 16 | VCC | Supply voltage (2V–6V) | power |
View the interactive 74HC138 package diagram and labeled pin details on WhichPin.