Hello all, I selected ARM as the toolchain but I guess this is a general question actually. Every device that I saw so far clearly specifies the allowed temperature operational range. But what happens in terms of electrical properties if you, say, exceed that by heating the device (stopping short of melting the device)?
Mil-spec is -55 .. +125C Industry is -40 .. +80C Also look at automotive -40 .. +125C
An important factor is that the memory retention times will be greatly reduced at high temperatures.
I saw an EEPROM where the retention was 25 years at +30C and 3 years at +70C. A factor ten in rentention time for 40C difference (and every +10C at a fixed distance on the logarithmic scale). Extrapolate that and you would get 4 months at +110C and maybe 12 days at +150C.
In real life, there is very much variance between individual chips and individual memory cells, so don't bet too much on your EEPROM being able to correctly store your data.