TCA9517: About behavior at VCCA and VCCB=0V

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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

over 5 years ago

0 Max Robertson over 5 years ago

TI__Guru 62910 points

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

0 Hide over 5 years ago in reply to Max Robertson

Guru 21045 points

Hi Max-san,

Thank you for your response.

I’m looking forward to hearing from you.

Regards,

Kanemaru

0 Hide over 5 years ago in reply to Hide

Guru 21045 points

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

0 fhoude over 5 years ago

TI__Genius 17555 points

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

0 Hide over 5 years ago in reply to fhoude

Guru 21045 points

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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TCA9517: About behavior at VCCA and VCCB=0V