Dear Team:
Customer aksed us how to setting VCC, when upstrem (pin14,15) is 1.8V, downstream(pin4,5) is 3.3 V.
We checked datasheet SCL/SDA VIH voltage is 0.7xVCC. If we set Vcc=3.3V that VIH=0.7x3.3=2.3V over upstream 1.8V pull high voltage, In datashee 10.2.1 show we can set Vcc=3.3V.
Or in applikcation, upstrem (pin14,15) pull high voltage should be higher than downstream (pin4,5) pull high voltage, right?