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TUSB4041I: Power up timing requirements

Kuramochi Tadahiko
Guru 28715 points
Part Number: TUSB4041I

Hi,

I would like to ask the Power up timing requirements of the datasheet.

I think that (1) is mentioned about the time from power-on to the GSTz, however the td1 is specified the time of relation during VDD and VDD33.

What is relation between td1 and note(1)?

About note(2), what does "power-on relationship" mean?

Best Regards,

Kuramochi

  • 0
    TI__Guru 60870 points
    HI TQ,

    The ramp order of 3.3V and 1.1V (power-on relationship) only matters if the application is using a passive reset circuit. In that case, td1 applies. If there is an active reset to the hub, then only td2 applies to GRSTz timing.

    Regards,
    JMMN