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TCA9617B: SCLB SDAB working current

Charles Zhang1
Expert 3430 points
Part Number: TCA9617B

Hi Team,

Is there any way to evaluate the working current on SCLB and SDAB pin? We can only find quiescent current spec in the datasheet.

Regards,

  • +1
    Guru 317250 points

    What do you mean with "working current"?

    "Quiescent" means that the I/Os are not switching. The datasheet lists the supply current for both high and low states; the total supply current depends on how much the I²C bus is in each state.

    The current sunk by the outputs when they are driving low depends mainly on the pull-up resistor values, so it cannot be specified in the datasheet. Use I = (VCC − VOL) / Rpullup, where VOL is about 0.5 V.