[sdiy] SN94280?? Sound Generator?

[Jeff Barganier]

Ken and John:  Thanks for the information and leads.  I found what I
needed.
-Jeff

-----Original Message-----
From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl] On Behalf Of john mahoney
Sent: Friday, September 10, 2004 9:00 AM
To: 'synth-DIY'
Cc: Jeff Barganier
Subject: Re: [sdiy] SN94280?? Sound Generator?

----- Original Message ----- 
From: "Jeff Barganier"

> Does anyone have any information on this 16 pin TI chip?  I was
unable
> to find anything on the web.  According to (what I think is) the
date
> stamp on the chip it was made in October 1979.

The SN94281 was sold at the Shack. It is likely the sister chip to the
SN94280. The 281 has an on-board 125mW audio amplifier. If my
assumption is correct, the 280 is identical except that it has a
low-level output (even lower than 125mW, that is).

I'm basing this guesswork on the SN76477 & SN76488 chips. The 77
didn't have an amp whereas the 88 did. Pinouts are the same.

The 8-page datasheet for the SN94281 can be found at the top of this
page:
http://www.decodesystems.com/old-ics.html
--
john