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TCA9517: About behavior at VCCA and VCCB=0V

Part Number: TCA9517

Hi Team,

 

I understand that All inputs and I/Os are over-voltage tolerant to 5.5 V, even when the device is unpowered (VCCB and/or VCCA = 0 V).

Then, I/Os voltage (SDAA and SCLA) don’t leak out to VCCA and VCCB pins.

Is my understanding correct?

 

Regards,

Kanemaru

  • Hello Kanemaru-san,

    Yes, I believe your understanding is correct but will look into this further to be able to confirm fully. We will get back to you early next week.

    Max
  • In reply to Max Robertson:

    Hi Max-san,

    Thank you for your response.

    I’m looking forward to hearing from you.

    Regards,

    Kanemaru

  • In reply to hideto kanemaru:

    Hi Max-san,

    Could you please let us know the current status?

    If you could reply by today, it would be very helpful.

    I’d greatly appreciate your verification.

    Regards,

    Kanemaru

  • There is a pull up resistor between SDA/SCL and VCC so that will always be in the path and could be considered a leakage path. The part it's self won't leak additional current between the nodes.
    -Francis Houde
  • In reply to fhoude:

    Hi Francis-san,

     

    Thank you for your prompt reply.

    I understand that TCA9517DGKR does not have a leakage path between I/O pins (SDAx and SCLx) and VCCx pins.

     

    Regards,

    Kanemaru

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