[sdiy] Mystery IC

[David Osborne]

Many thanks everyone, that has all been really useful. 
Looks like they could make a handy little cv quantizer or waveshaper/distorter maybe...
As soon as i get a weekend off work, I'll see what I can come up with.
 
davido


-----Original Message-----
From: Tim Parkhurst [mailto:tim.parkhurst at gmail.com]
Sent: 22 May 2008 23:16
To: Fabio Gonzalez
Cc: David Osborne; synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] Mystery IC


Interesting. It sounds sort of like half a LM3915 bar graph chip... with open collector outputs.

Tim (sounds like... ) Servo
-- 
"Imagination is more important than knowledge." - Albert Einstein


On Thu, May 22, 2008 at 3:02 PM, Fabio Gonzalez <u2arte26 at gmail.com> wrote:

Not datasheet, just.. asciisheet?

TL487C
IC Voltage Level Indicator, 5 steps, Log response, Open Collector Outputs

pin 1 = ground
pin 2 = Q1 |
pin 3 = Q2 | All outputs
pin 4 = Q3 | Open collector
pin 5 = Q4 |
pin 6 = Q5 |
pin 7 = Vcc (12Vdc max)
pin 8 = Analog In (no idea about the range)

Hope it helps,

Fabio
.


On 5/22/08, David Osborne <DavidO at matinee.co.uk> wrote:
> Hi everyone,
>
>  I have little bag of a mysterious chip which I do not know how to identify. They are an 8pin DIP labelled TL487CP, with a texas Intruments logo. I've searched the intertubes, and cannot find anything to give a clue as to what it may be, let alone a datasheet. I assume it is quite old, as the TI website does not come up with anything from that part number.
>  Does anyone have any ideas how one may go about looking for information about it?
>
>  Regards
>  Davido
>
>  David Osborne
>  AV Studio Manager
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