Re: Anybody recognize a 40-pin IC marked PT1482B-01?

"Norm Dresner" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Each IC is marked with a manufacturer's logo that's a small circle in the
> middle of an "integral" sign (elongated S).  Might be Siliconix (or maybe
> WD).  Date codes range from '79-'81 on the board I have which has 18 of
> these beasts.  There's a raised center section, ~1cm square with a round
> circle in the middle.  It's covered over with a paint/tar compound;  I've
> scraped it off and the round circle is definitely not a "quartz" window
but
> just a round depression in the center.   The underside of the IC indicates
> that it was manufactured in Malaysia.  The underside is also marked
> AA1482-B00 with a lot and date code that doesn't agree with the one on the
> top.

The one I know with an integral sign is Integrated Device Technology, which
comes out and integral sign, and then dt.

I don't think I have a manual with the  1482, but maybe IDT will make it
easier to find.

-- glen