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PCA9548A: Pull-up voltage level between SCL/SDA & SCn

Part Number: PCA9548A

Hi there:

I'd like to check an customer's application for PCA9548A.

Please refer the following picture from customer schematic.

We've known the VCC is 3.3V, 1.8V for SCL/SDA and 3.3V SC0~3

Is there any risk or suggestion for this different between those 2 voltage level?