TCA39306: Question about using TCA39306 for I3C (1.2V <-> 3.3V) level shifting

Part Number: TCA39306

Hi,

I'm designing an I3C interface (1.2V to 3.3V) that needs to support up to 12.5MHz. I’m considering the TCA39306, but I ran into a few concerns and was hoping to get some advice here.

According to the datasheet, the TCA39306 doesn't support automatic switching between Open-Drain (OD)​ and Push-Pull (PP)​ modes. Since this chip requires external pull-up resistors for level shifting, I'm wondering:

1. Is this chip still a viable option for an I3C application?

2. If yes, how do I calculate the appropriate value for the external pull-up resistors?

   • Context:I've calculated the total load capacitance on both sides of the chip to be around 22pF. What should I consider next to determine the resistor values?

Any insights or suggestions would be greatly appreciated!

Thanks!