Microcontrollers with high temperature range.

Hi,
I am looking for components which works at high temperature. Especially I am looking for microcontrollers which works at 180 °C to 200 °C. I need to found microcontroller which works fine at extreme conditions. If the microcontroller have built in CAN interface then it would be really nice? or any other methods and microcontrollers that i can use for my project.

I don't know much about this subject, but I found this: TI High-Temperature Guide
Good luck finding a cheap one..

Since mosfets have typicaly maximum junction temperature of 175°C, I doubt you will find a reliable silicon chip working above that.
Oh I see that the ceramic packages are supposed to work up to 210°C, my bad.