[sdiy] DIP LM13700 discontinuation

[chris]

On Thu, 20 May 2021 10:07:19 +0200 Steve via Synth-diy <synth-diy at synth-diy.org> wrote:

> > And at that scale, the rework is also not hard, and I think it's far
> > easier to actually properly desolder SMT parts than through hole.
> There it would seem that smaller parts are easier - heat it all up with
> the hot air station (the cheap ATTEN 858D+ does it),
> which would seem difficult with SOIC of that pin count. (OK it's also
> not fun with e.g. UFQFPN with a nasty thermal sink in the middle)
> 
> IIRC I never de-soldered a SOIC - how *do* you do that? Flux and wick
> still leaves a little bit of connecting solder on many pins at the same
> time?
> I faintly remember once using a piece of lacquer insulated copper wire,
> dragging it under the first heated pin in line, then the next, and so
> forth, where the wire keeps the pins from the pads. That was not as big
> a part, though.

Using hot air this is easier than I had expected.

I once had to desolder a finger nail sized TQFP Atmel Mega 64, and it
was a breeze. I had suspected everything around would float away, but it
was possible to work exactly where I wanted. Only took a couple of
seconds.

I'd rather do that than suck-wicking a DIL-40.

Chris