LM324: was (RE: TL082/TLO84?)

[Paul Perry]

At 10:49 PM 1/03/99 -0600, Tim Curtis  wrote:

>Is this what I just had happen with a TL064? It looks like the negative and
>positive pins shorted and the chip burned up internally.
>So this is not uncommon?
>
I've never seen this happen.
What I have seen, is attempts to replace a single by a dual or quad (or vice-
versa) fail due to a slight change in layout producing high frequency
oscillations.
And, with a dual or quad, it is slightly liklier to happen because of the common
power pins. With proper layout and design, there shouldn't be any problems.

Sometimes when this sort of thing is just too mysterious, I replace the
offending
chip with another of identical pinout but different characteristics...
sometimes 
this can clarify the situation.

paul perry Melbourne Australia