I could say the same as Steve.

When we talk about destroying ICs, it's surely hundred times more likely to destroy them by electrostatic discharge than by heat. All modern components are very sensitive to electric charge (as we all know), but about overheating, when you solder one pin at a time, the pin gets heated, but not so much the closest semiconductor in an IC. The pins are connected to the core by tiny wires, which are (as far as I know) melted to pins. So they are also a good thermic barrier to the core. It's easier to destroy discrete components - diodes, transistors etc, than ICs.


Slobodan