The only time I have ever had an AT89C52 over heat is when I put the PLCC-to-DIP converter in the wrong way.

Luckily the programmer was fine, but it turned the AT89C52 into a useless piece of plastic.

I think it might be in wrong, or you are using a programmer which wasn't designed for an AT89C52.

Check VERY thoroughly what you are doing, I'm pretty sure you've wrecked that chip, and putting any more in will wreck them too.


Chris.