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BOOSTXL-TPS650861: I2C pull up voltage

Ashish Kumar Pandey
Prodigy 115 points
Part Number: BOOSTXL-TPS650861
Other Parts Discussed in Thread: TPS650861,

Hi,

Kindly clarify what is correct pull up voltage for I2C ?? 1.8V or 3.3 V ??

As mentioned in the datasheet of TPS650861 the pull up voltage should be 1.8V but the same I2C pins are pulled up to 3.3V in the  BOOSTXL-TPS650861??

Regards,

Ashish 

  • 0
    TI__Mastermind 27720 points

    Hi Ashish, 

    If you refer to the recommended operating conditions section of the TPS650861 datasheet (page 8) it states the recommended maximum voltage for the I2C pins (CLK & DATA) is 3.3V. For the I2C connections you are free to have the pull up voltage be either 1.8V or 3.3V, whichever fits better in your end system. 

    Best Regards,

    Garrett