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)?
1) why are you concerned with this? 2) maybe I can save some data in an EEPROM will that not get hot too? 3) there are military and industrial temperature rangs available for many chips
Erik
Mil-spec is -55 .. +125C Industry is -40 .. +80C Also look at automotive -40 .. +125C
Erik, No, I am not in the weapons industry. My conscious would not allow that. I am curious because somebody asked me, and I didn't really know what to say. And then I asked myself: "what would I have done in such a situation?". control units of the kind that I work with are not expected to be exposed to more than, say, 50 degree celsius.
this is a perfect question for the forum - I would not want to put my MCBSTR9 in a microwave :)
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.
A microwave oven may represent more problems than just high temperatures :P
And then I asked myself: "what would I have done in such a situation?".
It's really quite simple: Don't be in such a situation!
A device can either withstand a given temperature, or it can't. If didn't, it's dead. Forever. Case closed.