According to the datasheet, section 7.3, Vih min is 0.9V. According to section 8.3.1, the ON pin is compatible with GPIOs of 1.5V and above.
We intend to use this device with a 1.2V GPIO on our custom ASIC, and can guarantee higher than 1.0V. Will the device work properly? What are the risks?
If that doesn't work we need to quickly redesign. Thank you!