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Original question:

DS90UB954-Q1: DS90UB954-Q1

DS90UB954-Q1: Rising time of VDDIO and VDD18

Ben Kuo
Expert 7560 points
Part Number: DS90UB954-Q1

Dear expert,

Customer connect VDDIO and VDD18 together(1.8V for both rail).

According to datasheet figure 55 VDDIO can be connect to VDD18 with T_rise_min=0.2ms.

Question:

Is T_rise_min= 0.1ms acceptable for DS90UB954? 

What's side effect is we don't meet this spec?

Thanks.

Regards,

Ben

  • 0
    TI__Guru** 103215 points

    Hello Ben,

    Please ensure that the datasheet recommendation of >0.2ms rise time is used for this rail. Anything outside of the datasheet recommendations has not been validated and may cause unpredictable behavior. 

    Best Regards,

    Casey