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Subject: Datasheet on NJM2069

From: Michael Hawkins <korgpolyex800@...>
Date: 2008-11-25

Hey Fran,

That's not the first time I've heard someone claim to have the datasheet for the NJM2069. Each time in the past, I have been bitterly disappointed when the claim has turned out to be only that - just a claim. I still have no datasheet for the NJM2069.

But every time I hear that claim I get heart palpitations because I've wanted that datasheet for years.

For two reasons, first, sometimes people need a replacement chip, like Ty might for example. And I've wanted to create a little PCB drop in equivalent filter. Second, I've always wanted to add a second filter and send DCO1 into filter 1 and DCO2 into filter 2.

Now, can you go find that datasheet - like - NOW - please. :-0

Mike.

From: narfman96 <narfman96@...>
To: korgpolyex@yahoogroups.com
Sent: Tuesday, November 25, 2008 7:35:39 AM
Subject: [korgpolyex] Re: Poly 800 problems, IC

Here is some info for the NJM2069:
KORG NJM2069
Pin# Function
1 Audio In GND (GND)
2 Mixer Signal 1 Level CV In
3 Mixer Signal 2 Level CV In
4 VCF Resonance CV In
5 VCF 12dB/oct Audio Out
6 VCF 24dB/oct Audio Out
7 VCA Signal In
8 VCA Level CV Log In
9 VCA Level CV Lin In
10 VCA Signal Out
11 Vss (GND)
12 -Vee (-5v)
13 VCF Cutoff CV Lin In
14 VCF Cutoff CV Log In
15 VCF cap C4
16 VCF cap C3
17 VCF cap C2
18 VCF cap C1
19 VCF Ext Audio In
20 Mixer Signal 2 In
21 Mixer Signal 1 In
22 +Vcc (+5v)
Which pin is busted? 2,3 or 20,21 Not sure if this can disable DCO1
but it sure looks like it could???
I've had good luck soldering to busted pins even if they were flush
with the side of the chip. Just remember the heat will now be much
closer to the inner workings. I also have the pdf datasheet for the
NJM2069 around here somewhere.
Good Luck, Fran