[sdiy] [AH] Fake CEM3374s, SSM2040s (what about IR3109 ?)

[ChristianH]

Apparently, there is a totally different SHARP chip with the same
number:
http://www.seekchip.com/icstock-I/IR3109.html
Automotive - so it's no surprise they have'em by the thousands...

Chris



On Thu, 4 Aug 2011 07:52:17 -0700 (PDT) Kenneth Elhardt
<elhardt at att.net> wrote:

> I'm on a borrowed Macbook computer right now so don't have access to all the links I've collected, but I've been confused over Roland IR3109 filter chips. I've found a number of places that have hundreds or even thousands in stock. Sometimes they'll even show a photo of the chip, and sure enough, it shows a Roland IR3109. But the description may show Sharp as the manufacturer and/or call it a 14 pin DIP (IR3109 is 16 pin DIP), and sometimes the functional description of the chip doesn't match Roland's. I don't know if the name IR3109 is used for more than one type of chip or what's going on. I got so fed up with the unknown and getting no response to my email, I followed the tip of another AH member and bought a used "beat to shit" PH-2 phaser for $25 and extracted the two IR3109's myself.
> 
> One example of a list of sources for IR3109's available by the thousands.
> 
> http://www.chinaicmart.com/series-IR3/IR3109.html
> 
> -Elhardt