• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 32 subscribers
  • Views 179 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TUSB4020BI: power up sequence

Hailiang Zhang
Expert 6385 points
Part Number: TUSB4020BI

Hi Team，

1, Please help to double check whether VDD33 can rise together with VDD11, or VDD11 needs to be at least 10u earlier than VDD33?

2. Is there a recommended minimum value for connecting GRSTs to ground with only one capacitor?

Regards，
Hailiang

  • +1
    TI__Mastermind 20840 points

    Hi Hailiang,

    Hailiang Zhang said:
    1, Please help to double check whether VDD33 can rise together with VDD11, or VDD11 needs to be at least 10u earlier than VDD33?

    This depends on how GRSTz is setup. If GRSTz is connected to ground via a capacitor, then VDD11 needs to be stable at least 10uS before VDD33.

    Hailiang Zhang said:
    2. Is there a recommended minimum value for connecting GRSTs to ground with only one capacitor?

    For recommended value, or typical application has one 1uF capacitor used to connect the pin the ground.

    Please let me know if you have any other questions.

    Thanks,

    Ryan