This *normally* should not happen. This is a "latch up" situation. Usually
occurs with cmos logic. What is your processor doing at the time of failure?
Is it programmed? Is there a proper POR condition present? Is the BOR used?
If not, the device is running away and performing illegal operations. It
could self destruct.
Rick

Michael Simpson wrote:

> Has any one ever experienced an 18F452 or 18F252 going into self destruct
> mode.   If I switch the power off and on real fast occasionally the chip
> will Start to overheat and eventually burn up.   This should not happen.
> But it does.  Nothing is connected to the chip other than 10K hold up
> resistor, 10Mhz Resonator and +5v power.
>
> --

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