The following images illustrate an example of a
PCB layout with the TMUX8108 and TMUX8109. Some key considerations are:
- For reliable operation, connect at least one decoupling
capacitor ranging from 0.1 μF to 10 μF between VDD and VSS
to GND. We recommend a 0.1 μF and 1 μF capacitor, placing the lowest value
capacitor as close to the pin as possible. Make sure that the capacitor voltage
rating is sufficient for the supply voltage.
- Keep the input lines as short as possible.
- Use a solid ground plane to help distribute heat and reduce
electromagnetic interference (EMI) noise pickup.
- Do not run sensitive analog traces in parallel with digital
traces. Avoid crossing digital and analog traces if possible, and only make
perpendicular crossings when necessary.