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TCA39416: VCCA and VCCB requirement

Part Number: TCA39416

I am reading the datasheet for VCCA and VCCB requirement.

One area says 0.72 V to 1.98 V on both A and B ports; VCCA VCCB

In another area says It is operational from 0.72 V to 1.98 V on both the A-side and B-side with VCCA must be less than VCCB for proper operation. 

My question is wheather VCCA can be the same voltage level as VCCB? Please clarify.