[sdiy] SSM chip reissue

[Kylee Kennedy]

Guarantee someone will create a tiny pcb to convert the SMT to DIP and
sort out the pin difference.

Kylee

On Sat, Apr 22, 2017 at 11:13 PM, Michael E Caloroso
<mec.forumreader at gmail.com> wrote:
> Looking at the datasheet...  SSI2144 is an "improved" version of the
> SSM2044; SMT format available, DIP is planned for future.  Works down
> to +/-4v, which puts it in low voltage designs.
>
> But... pinout is DIFFERENT.  Different enough that you DON'T want to
> plug a 2144 into an existing 2044 circuit.
>
> An SSM2040 reissue would be even better - the Rev1/2 P5s using the
> SSM2040 have a very colorful resonance.  It may not have on-board VC
> resonance, but the designer is free to use the feedback architecture
> of their choice and it can be configured into topologies other than
> lowpass.  The 2x44 includes VC resonance but the lowpass topology and
> feedback architecture is fixed on the die (although it does lower
> parts count).
>
> Interesting times... we can get brand new CEM3340s and SSI2144s.
>
> The SSM2050 VC EG was a problem IC... too much variance of transient
> timing between units.  SCI had to test EVERY SSM2050 for their P5s to
> get a matched set.  SSM2055 was a "replacement" that offered a pin for
> trimming the transients for matching between polyphonic voices, but
> CEM stole the market with their superior CEM3310.
>
> MC
>
> On 4/23/17, Justin Herrmann <ebn303afxcut at email.com> wrote:
>> Apparently some SSM chips are going to be released, new and improved, so to
>> speak:
>> http://www.matrixsynth.com/2017/04/ssm-chip-production-to-return-as-ssi.html?m=1
>>
>> Justin
>>
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