Customer has T1040 power-up question. They are planning on having all voltage rails come up ratiometrically (see image). This looks to be OK but they would like verification.
Have a great day,
The T1040 data sheet available on the NXP site (link) provides the power sequencing requirements. It should be satisfied. There are 3 groups of power supplies. There is not ordering requirement with respect to one another in the same group. Groups 1,2 and 3 must be ordered sequentially such that voltage rails on a previous step must reach 90% of their value before the voltage rails on the current step reach 10% of theirs
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