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DP83867E/IS temperature failure modes

Other Parts Discussed in Thread: DP83867E, DP83867IS

Hi

I'm deciding between the DP83867E and DP83867IS parts.

My design may need to go beyond the +85C temp requirement - still unsure.


Is there any data on failure modes above +85C?

 I’ll assume there isn’t any actual component changes, just up-screened?

My thought was that since SGMII is pretty high speed stuff and if that was an area of concern/difficulty above +85C then it would make sense to go with the +105C device. 

Cheers

Calum