Quick question for someone with a bit more experience.
I'm working on a product which will sit in an environment which is likely to experience some static discharge from time to time. Basically, some sensors are connected to an MCU over on average 30 meters of cable, so I guess some static discharge is bound to happen from time to time.
I have been testing the system with the following circuit to protect the MCU pin with no "incidents" so far:
As you can see, there are two ESD TVS diodes (D401 and D404), and two Schottky diodes (D402 and D403) protecting the MCU pin "DQ".
For a final production board, I would like to reduce BOM, and hence my question is whether having two sets of diodes (TVS and the Schottky) is completely redundant? If yes, should I remove the Schottky or the TVS diodes to reduce BOM?