I am using "54VCXH163245" bidirectional level shifter in one of my ongoing projects. I am using VCCA as 3.3V and VCCB as 1.8V. My queries are: 1. Is there any power-on sequencing requirement for 1.8V and 3.3V for this device.?

[AKuna.1]

However, For similar level translator device like "54AC164245", there is an explicit requirement of sequencing of 3.3V and 5.0V . Please confirm and clarify.

Then datasheet of device "54VCXH163245" says VCCA must be higher or equal to VCCB, but for "54AC164245 ", the requirement is exactly reverse(VDD1 (VCCB) must be higher than or equal to VDD2 (VCCA)). Kindly clarify.

Also is it ok to tie unused ports of "54VCXH163245" device to VSS(GND)?