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TUSB4020BI: Power Sequencing

Thrinesh S
Prodigy 180 points

Part Number: TUSB4020BI

Hi Team,

 

Power sequencing required for active reset? If yes, what was the timing requirements for VDD33 and VDD11

image.png

There is a contradiction between the information provided in the datasheet and the schematic checklist.

image.png

  • 0
    TI__Guru**** 157685 points

    there are two conditions:

    1: if VDD is stable before VDD33, 1uf cap on GRST  is needed.

    2: if  if VDD33 is stable before VDD, GRST should be low at least 3ms after VDD stable either controlled by external signal or with larger Cap ( >2uf(.

    Best

    Brian