[sdiy] Question for Yamaha tech?

[Senso]

Hi guys,

Tried this one at AH, but no smile so far. Maybe I have more luck here.

Does anybody know what kind of IC this is:
M51620P (8-dip)

It also says YIG8531 which, on the one hand, looks like a date code, 
but also has the letter markings that suggest it to be one of the 
Yamaha IG chips.

Of Google was my first try, which gave absolutely zero returns except 
one. The most surprising part was that there wasn't even a single 
question from anyone about it, something you will *always* encounter 
when a chip is rare.

The one entry was from sounddoctorin (yes, you Bob), but it gave no 
info except the entry M51620P/IG00150, suggesting it was the same as 
this Yamaha lfo.

Anyone?

Thanks,
Senso

PS: With all the information on the web about synthesizer parts, how 
come there is virtually nothing about Yamaha's integrated circuits?
I'd like to know more about the rest of the M516xx series as well...

-- 

----------------------------------------------------------------
................... VINTAGE PLANET ..................
.................. The Last Resort for ..................
... parts, books, manuals, sounds and more ...
............. http://www.vintageplanet.nl ............
----------------------------------------------------------------