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TCAL6416: SDA and SCL Input state with no power

FXtreme Electronics
Prodigy 210 points
Part Number: TCAL6416

Hi:)

When the TCAL6416 has no power on either the VCCI / VCCP, is it still possible to have a functioning I2C bus connected? I2C bus operates at 3.3V.

Thanks!

  • +1
    Guru 317060 points

    Yes; the absolute maximum ratings and recommended operating conditions allow voltages above VCCI on the I²C pins. (The IIOK specification in the absolute maximum ratings would imply that SDA has a clamping diode to VCCI, but this appears to be an error.)