[sdiy] Latvian CEM Synth IC clones

[chris]

Can QFN be hand-soldered without an oven?

Chris



On Tue, 13 Mar 2018 11:10:51 +0000 paula at synth.net wrote:

> Tom,
> 
>   For me it's a size thing. I mean consider, a VCO, VCF, VCA and ADSR in 
> a 4mm squared package?? I mean you've got a synth voice in such a small 
> space. Small space = lower cost and better thermal coupling if you have 
> multiple voices.
> 
> Paula
> 
> On 2018-03-13 10:22, Tom Bugs wrote:
> > Can you expand a bit on that Paula?
> > I've never really considered them...
> > Is it mainly a size thing or am I missing something 
> > interesting/important?
> > 
> > 
> > On 13/03/2018 10:16, paula at synth.net wrote:
> >> QFNs are awesome.
> >> 
> >> On 2018-03-13 09:00, Roman Sowa wrote:
> >>> I've read somewhere that they don't do SOIC for anything greater than
> >>> 16 pins, but can't remember exact explanation. In general it was in a
> >>> spirit of "SOIC sucks". In every Alfa QFN chip they say about center
> >>> pad greatly improving thermal stability.
> >>> 
> >>> Roman
> >>> 
> >>> W dniu 2018-03-12 o 22:34, Jay Schwichtenberg pisze:
> >>>> Wonder why they didn't do the AS3320 as a SOIC. Maybe they didn't 
> >>>> have 18 pin SOIC packages and had QFN packages.
> >>>> 
> >>>> Jay S.
> >>>> 
> >>>> *From:*Synth-diy [mailto:synth-diy-bounces at synth-diy.org] *On Behalf 
> >>>> Of *cheater00 cheater00
> >>>> *Sent:* Monday, March 12, 2018 12:27 PM
> >>>> *To:* synth-diy mailing list
> >>>> *Subject:* [sdiy] Latvian CEM Synth IC clones
> >>>> 
> >>>> Of interest
> >>>> 
> >>>> http://www.alfarzpp.lv/eng/sc/application.php
> >>>> 
> >>>> 
> >>>> 
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