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SN65HVDA1040A-Q1: tPLH for SN65HVDA1040A-Q1

Part Number: SN65HVDA1040A-Q1

Dear Sirs,

My customer asked us about tPLH for SN65HVDA1040A-Q1.

The result of tPLH was different under the following conditions A and B.
A: When the bus first transitions to dominant after continuing recessive more than 20 μs
B: When transitioning from recessive to dominant after A

A result is about 20 nsec longer than B.

Do you know the possible causes of this phenomenon?
Please let  us know what you think about this phenomenon.

Best Regards,

Y.Hasebe