Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.1 6/24/83; site burl.UUCP
Path: utzoo!watmath!clyde!burl!pmh
From: pmh@burl.UUCP (Peter M. Hermsen)
Newsgroups: net.micro
Subject: 300/1200 Bell 212a compatible modem chip set available
Message-ID: <500@burl.UUCP>
Date: Wed, 11-Jul-84 12:41:12 EDT
Article-I.D.: burl.500
Posted: Wed Jul 11 12:41:12 1984
Date-Received: Thu, 12-Jul-84 03:51:48 EDT
Organization: AT&T Technologies; Burlington, NC
Lines: 39

--
Ok all you 1200 baud fanatics out there in net land. Has anyone
thought of looking at EXAR for their 1200 baud chip set? How about
the set of :
1. XR-14412 FSK Modem 300 Baud
2. XR-2120  Filter-Switched Capacitor
3. XR-2123  PSK modem 1200 Baud

The chips listed above are available for about $65.00 total in
single quantities from EXAR's distrubutors. There was a good article
in EDN magazine concerning these chips and the modem they constitute
when assembled as a unit with a few vanilla flavored CMOS devices
and 2 LSTTL's. By the way, the issue that had the article was EDN
May 17, 1984. The article "Low-cost modem circuit meets Bell
Standard 212A" was submitted by Jim Lange at EXAR. (Let's give
credit where credit is due.) 
I called EXAR and they sent me a complete schematic, board layout
and source listing (8748 controller optional). The address is:
	EXAR Integrated Systems, Inc.
	750 Palomar Avenue
	Sunnyvale, CA 94086
 	
	(408) 732-7970

Give them a call or drop them a line. The info they provide is very
useful.

Disclaimer: I have no affiliation with EXAR. I am offering this
article as a public service :-).
--
-- 
From the non-linear mind of a non-anonymous hacker!!
				Pete Hermsen
ihnp4!	\			PO Box 2304
akgua!	 \burl!pmh		Burlington, NC 27216
cornell! /			(919) 228-4215 (w)
ulysses!/

"Not all roads lead to Hollywood..."