My design intent for this part is to power VDD(I2C-BUS) at 3.3V and VDD (P) at 3.3V, but I want to use the part to control 5V I/Os through PO-P7 as the part is 5V tolerant.
1. The diagram is taken from their datasheet (page 14) for their I/O protection diodes. What’s the breakdown voltage of the ESD protection diode? See datasheet.
2. Would the ESD diode conduct continuously if I connect P0-P7 at 5V but have VDD(P) at 3.3V? My P0-P7 would be drawing 3-5mA per port pin.
3. Are the P0-P7 5V tolerant if both the VDD supplies are at 3.3V?