Figure 11-1 shows an example of a PCB layout with the TMUX6121, TMUX6122, and TMUX6123.
Some key considerations are:
- Decouple the VDD and VSS pins with a 0.1-μF capacitor, placed as close to the pin as possible. Make sure that the capacitor voltage rating is sufficient for the VDD and VSS supplies.
- 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.