Do you know if these parts will work at >+85'C?
If yes, at what temp will performance start to degrade?
Both can work above 85 C. The performance will continue to degrade as you increase frequency, like it does when you go from 25 C to 85 C.
As Ta increases, Tj will exceed 150 C which will cause MTTF reduction. But the parts will continue to operate until some Ta without instant failure. We have not tested for Ta higher than 85 C; but electrical wise there should not be any instant failure at Ta=105 C.
What is your application ambient temp?
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