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TUSB4041I: power sequencing

[FAE] Andrew Wang
Genius 10685 points
Part Number: TUSB4041I


Hi Team,

Customer has quick question regarding power sequencing statement in our datasheet, I too cannot understand how it means.

Per datasheet saying: "The VDD33 and VDD have no power-on relationship unless...

GRSTz is only connected to a capacitor to GND. Then VDD must be stable minimum of 10 μs before the VDD33."

  1. Per my understanding after reading this statement above, we suggest customer to do the sequence below:VDD stable -> 10ms wait time ->  VDD33 stable -> 3ms wait time -> GRSTz      => is this correct?
  2. Can any expert please show alternative way of connection with GRSTz, besides 1uF to GND as shown in EVM sch? So customer doesn't need to have power sequencing. thx.

Andrew