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From: robf@mcs213j.cs.umr.edu (Rob Fugina)
Newsgroups: sci.electronics
Subject: Re: ? Touch Tone Decoder IC
Message-ID: <2690@umriscc.isc.umr.edu>
Date: 28 Apr 91 18:38:29 GMT
References: <1629@west.West.Sun.COM>
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In article <1629@west.West.Sun.COM> flloyd@L1-A.West.Sun.COM (Fred Lloyd SUN Phoenix SE 602-275-5537 x17) writes:
>Can anyone recommend a good Touch Tone Decoder IC?  I'd like to decode
>all 16 tones with a 4 bit output and strobe.  I'd like a cheap solution
>with minimum parts count. 

Although I have never used the chips, I have a Teltone Electronics data
book, and it seems their M8870 is exactly what you want.  There are other
companies that make touch tone decoders that probably are pin-compatable
that include the "8870" in the device number.  The reason I haven't used
the chips is that I can't find anywhere to get ahold of one...yes, one.
The only place I've found them at all is with Active Electronics, (not the
Teltone part, but another brand), and that particular item has a $25
line-item minimum due to how they stock it.  Hope I helped a bit...

Rob  robf@cs.umr.edu