SNLS641 March 2019 DS90UB940N-Q1
PRODUCTION DATA.
The 1.8-V or 3.3-V inputs and outputs are powered from a separate VDDIO supply to offer compatibility with external system interface signals.
NOTE
When configuring the VDDIO power supplies, all the single-ended data and control input pins for device must scale together with the same operating VDDIO levels.