Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!ucsd!pacbell.com!decwrl!ads.com!sparkyfs.erg.sri.com!gd
From: gd@erg.sri.com (Greg DesBrisay)
Newsgroups: sci.electronics
Subject: Re: Need info on DTMF decoder chips.
Message-ID: <1991Jan10.014811.11119@erg.sri.com>
Date: 10 Jan 91 01:48:11 GMT
References: <1991Jan6.213544.5386@techbook.com>
Sender: news@erg.sri.com
Distribution: usa
Organization: SRI International, Menlo Park, CA
Lines: 24



Here's a list that I compiled a couple of months ago of companies that
make DTMF receivers.

	Teltone in Kirkland, WA (800-426-3926, 206-827-6050 (fax))
	   makes their 8870 DTMF receiver (18-pin DIP, single 5V
	   supply, aprox. $5.75 ea. in single quantities)

	Sierra Semiconductor in San Jose, CA 
	   makes DTMF receivers (SC11202/SC11203/SC11204 and
	   SC11270/SC11271), and transceivers (SC11280, SC11289, and
	   SC11290).  Most of these require only a single 5V supply.
	   The complete circuit for the SC11280 transceiver requires
	   only a few external resistors and capacitors and an
	   external crystal, and it can interface directly to a
	   microprocessor. 

	Silicon Systems in Tustin, CA
	   also makes several DTMF receivers and transceivers that all
	   operate on a single 5V supply as well.


Greg DesBrisay