DLPS037F October 2014 – June 2021 DLPC900
With the exception of USB_DAT, the DLPC900 does not support any other 5-V tolerant I/O. However, I2C typically have 5V requirements and special measures must be taken to support them. It is recommended that a 5-V to 3.3-V level shifter be used.
It is strongly recommended that a 0.5-W external series resistance (of 22 Ω) to limit the potential impact of a continuous short circuit between either USB D+ or USB D– to either Vbus, GND, the other data line, or the cable. For additional protection, also add an optional 200-mA Schottky diode from USB_DAT to VDD33.