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TCA9535 / Delta Icc

S.Satoshi
Guru 21685 points

Hi,

I know that there is delta Icc spec in Rev.B datasheet, but it was deleted at Rev.C. Please let me ask about it.

  1. Can you explain what was delta Icc?
  2. Can you explain why you deleted this spec?

Best Regards,

Sonoki

  • 0
    TI__Expert 5140 points

    Hi Sonoki,

    Thanks for the question.

    In a revision of the datasheet, It was decided that the specification delta ICC in the electrical characteristics only showed a single data point of additional standby current that was shown throughout the device. This can range from different configurations in the device when certain inputs are tied high or Grounded.

    If you take a look at the graph below, which can be found in the Typical Characteristics section of the datasheet, we show various curves of delta ICC for the customer.

    Thanks,

    Siby

  • 0 in reply to Siby James
    Guru 21685 points

    Hi Siby,

    Thank you for your comment. Let me ask two more question.

    1. Regarding the meaning of delta Icc, I understand that it's an additional Icc to Quiescent current at standby mode, right?
    2. Regarding delta Icc in Rev.B datasheet, the unit was "mA" but I believe that this was typo and it should be "uA" because "mA" is too large for delta Icc. Is my understanding correct?

    Best Regards,

    Sonoki

  • 0 in reply to S.Satoshi
    TI__Expert 5140 points
    Hi Sonoki,

    1. Delta ICC is additional current if any of the pins are not at GND or VCC. The best case operation will occur when Vi = VCC or GND and anything in between will have shoot through current.

    2. This was a typo. As you can see in the new Revision of the datasheet with the graph. The units on the Y-Axis are in "uA."

    Thanks,
    Siby