TCA9617A: TCA9617 - I2C Problem

Part Number:TCA9617A

Hi Team,

I am using the TI  TCA9617 component for I2C bus.

My Aardvark device works at 3.3V voltage level and the Slave device (my chip) works at 1.8V voltage level.

I have some difficulties in running the I2C bus at 800K and have some questions:

1                     Are there known problems with this chip?

2                      Which value of pull-up resistors should be used for each side of the chip?

Thanks,

Shlomi