P82B96: How to determine Sx / Sy capacitor (C2)

Hello Sakai-san,

The C2 capacitance shown on Figure 10 (and referenced in Table 1) is intended to represent the capacitive loading of the PCB.  This would be the sum of the parasitic trace capacitance as well as the pin capacitance of any devices connected to the bus.  Per the I2C standard, this can be as high as 400 pF total.  For a given load capacitance value, a pull-up resistance should be chosen so that the desired signal rise times can be met.  (For more details on pull-up resistor selection, you can reference http://www.ti.com/lit/an/slva689/slva689.pdf).

Please let us know if you have any further questions.

Regards,
Max