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TUSB8020B GRSTz at Startup

Hi Team,

I have some questions about this sentence in the datasheet:

A minimum reset duration of 3 ms is required, which is defined as the time when the power supplies are in the

recommended operating range to the deassertion of GRSTz. This can be generated using programmable-delay

supervisory device or using an RC circuit.

I already found this here in the forums but it is a little bit unspecific in some therms:

Questions I still have:

  • Which supply rail is the internal pull-up connected to and approximately what is its value?
  •  Is there an internal voltage rail monitor that waits until both regulators are in regulation before allowing the capacitor to charge through the internal pull-up?
  •  What do you consider ramping “quickly” or “slower”?

Thank you for your time!

Best Regards,

SF