Please, tell me of them :-)

Let's analyse it from an engineering viewpoint - not thinking of that this is something which nobody specified so there is no warranty to make it consistently and without impact on other parts of the chip (and also not thinking on legal etc. consequences).

If destruction of the output (N-channel) transistor is required I can think of only one method - put a voltage up to VCC on it while switched on. Each other way the input protection diodes would be involved, with possibly more significant impact on the circuit as a whole. Now this can be varied by limiting the voltage and current in amplitude and time in attempt to protect the bonds and the ground connection of the transistor which might be connected to other parts of the circuit... Basically, it should not harm the other parts of the circuit in other way than overheating, so the aim is to minimize the power and energy needed to melt the N-transistor's channel.

Some experimentation would be needed, definitively...

Jan Waclawek


PS.: Jez, good to see you here again.