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From: hplabs!mcdcup!phil@ucbvax.berkeley.edu (Phil Weinberg SPS)
Newsgroups: comp.dcom.telecom
Subject: Re: DTMF Decoder Wanted (or Chips/Schematics)
Message-ID: <14412@accuvax.nwu.edu>
Date: 7 Nov 90 01:30:02 GMT
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Reply-To: Phil Weinberg SPS <hplabs!mcdcup!phil@ucbvax.berkeley.edu>
Organization: Motorola Semiconductor Products, Sunnyvale , CA 94086-5303
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X-Telecom-Digest: Volume 10, Issue 795, Message 3 of 13


In article <14220@accuvax.nwu.edu>, aardvark!steve@tessi.uucp (Steve
Willoughby) is quoted as saying earlier:

> The problem is that I can't seem to find any references to
> DTMF-decoder chips or schematics of discrete-component circuits to do
> this function.  Any help would be appreciated.

Motorola Semiconductor makes a DTMF decoder chip called the MC145436.
It's available in a DIP package as a MC145436P ($3.09/each) or in a
surface mount version MC145436DW (also $3.09 each).  It should be
available at your Motorola authorized distributor.

You might want to get a copy of Motorola's Telecommunications Device
Data Book (motorola P/N DL136/D) which has all kind of telecom goodies
(or is that goodys?) that are available as standard off-the- shelf
devices.

No disclaimer.  I work for Motorola Semiconductor and hope you buy
bunches of our circuits!!

<< Usual Disclaimer >>
Phil Weinberg @ Motorola Semiconductor, Sunnyvale, CA 94086-5395 
UUCP:  {hplabs, mot,} !mcdcup!phil
Telephone:  +1 408-991-7385