http://sewingwitch.com/ken/pics/307AAP3.jpg

Text reads:

QTC
307AAP3
9622G

I'm guessing the QTC is Fairchild Opto so this is probably some old
optocoupler.

On Tue, 01 Jul 2008 03:02:56 -0500, Kenneth Porter
put finger to keyboard and composed:

http://sewingwitch.com/ken/pics/307AAP3.jpg

Text reads:

QTC
307AAP3
9622G

I'm guessing the QTC is Fairchild Opto so this is probably some old
optocoupler.

FWIW, the number "307AAP3" at usbid.com brings up Fairchild as the
manufacturer. "9622" is probably a YYWW date code.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

On Jul 1, 4:02*am, Kenneth Porter
wrote:
http://sewingwitch.com/ken/pics/307AAP3.jpg

Text reads:

QTC
307AAP3
9622G

I'm guessing the QTC is Fairchild Opto so this is probably some old
optocoupler.

Any chance this is a Maxim DG 307AAP ?

On Jul 1, 4:02*am, Kenneth Porter
wrote:
http://sewingwitch.com/ken/pics/307AAP3.jpg

Text reads:

QTC
307AAP3
9622G

I'm guessing the QTC is Fairchild Opto so this is probably some old
optocoupler.

Mr. Land wrote:
Any chance this is a Maxim DG 307AAP ?

On Jul 1, 4:02 am, Kenneth Porter
wrote:
http://sewingwitch.com/ken/pics/307AAP3.jpg

Text reads:

QTC
307AAP3
9622G

I'm guessing the QTC is Fairchild Opto so this is probably some old
optocoupler.

I went to Mouser and searched 307AAP3 and got nothing.
On QTC I got mostly these guys,
http://www.mouser.com/phoenix.
One piece that came up was http://www.mouser.com/fairchildsemi,
and this was an opto device, but a sensor only.
Being a through hole device probably puts it at '96 or older, since
surface mount has taken over, so at 12 years this may be a junk/surplus
part and not even on any major site. Get some 20 year old data books and
you might find it.
Good luck,
Bill Baka

"Mr. Land" wrote:

Any chance this is a Maxim DG 307AAP ?

Not with QTC on it.

'Quality Technologies' IIRC.

Graham

I now believe that QTC is Quaestus Corporation, an optocoupler supplier
which was acquired by Fairchild and then sold to Everlight.

On Wed, 02 Jul 2008 14:09:49 -0500, Kenneth Porter
wrote:

:I now believe that QTC is Quaestus Corporation, an optocoupler supplier
:which was acquired by Fairchild and then sold to Everlight.


It seems you are correct
http://sec.edgar-online.com/2001/04/...8/Section4.asp

The operational name however, was QT Optoelectronics.

The first SEC application to acquire QT Opto was made in 1995 and it was
completed around early 2000. In 2001 QT Optoelectronics Inc. formally became
"Fairchild Semiconductor - Optoelectronics Group".

In 2006 Everlight Electronic Co (Ltd) Taiwan acquired the opto business from
Fairchild.

For those curious to know what happened:

http://www.tacticalgamer.com/hardwar...8712-identify-
chip.html