The image below illustrates an example of a PCB layout with the TMUX7308F and TMUX7309F. Some key considerations are:
- For reliable operation, connect a 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.