Wiring
The following components are required to wire a 74HC4067 breakout board:
- A 74HC4067 breakout board.
- Buttons or switches.
Important
MobiFlight only supports connecting buttons to multiplexers. Encoders must be connected directly to a board.
The +5V power can come directly from the connected board. When using the chip directly without a breakout board, ensure the EN pin is connected to GND through a 10kΩ resistor.
Tip
When connecting additional multiplexers to the same board, they must share the S0–S3 pins. Each multiplexer must use a dedicated SIG line.
In electrically noisy environments, a pull-up resistor can be connected between +5V and SIG to increase signal reliability. Use a 10kΩ resistor with +5V data signals, and a 1–5kΩ resistor with +3.3V data signals.