[sci.electronics] Need info on DTMF decoder chips.

rpw3@rigden.wpd.sgi.com (Rob Warnock) (01/08/91)

In article <1991Jan6.213544.5386@techbook.com> tedpan@techbook.com
(Teddy Panarto) writes:
+---------------
| I've been looking for a DTMF decoder chip, NOT the chips that generate
| DTMF tone, but the ones that decode the tones to binary (for example) output.
| One that I know of is M-956, made by Teltone, but I have no luck on finding
| the company. Signetics also makes them, I believe. I live in Portland,
| Oregon, so if anyone can help me on where to find such chips, I'd be very
| grateful. It really doesn't matter what company makes the chips, as long as
| it's a DTMF decoder with (preferrably) binary output.
+---------------

Believe it or not, try your local Radio-Shack. They stock the Silicon Systems
SSI-102 (?) which is exactly what you're asking for. (I could be off a bit on
the part number.)


-Rob

-----
Rob Warnock, MS-9U/515		rpw3@sgi.com		rpw3@pei.com
Silicon Graphics, Inc.		(415)335-1673		Protocol Engines, Inc.
2011 N. Shoreline Blvd.
Mountain View, CA  94039-7311

paul@Data-IO.COM (Paul Brownlow) (01/09/91)

In article <1991Jan6.213544.5386@techbook.com> tedpan@techbook.com
(Teddy Panarto) writes:
+---------------
| I've been looking for a DTMF decoder chip, NOT the chips that generate
| DTMF tone, but the ones that decode the tones to binary (for example) output.
| One that I know of is M-956, made by Teltone, but I have no luck on finding
| the company.
+---------------

Teltone is headquartered in the Seattle area:

Teltone Corporation
10801 - 120th Av NE
Kirkland, WA 90834
(206) 827-9626

-- 
Paul Brownlow				| "Saddam Hussein is a liar" -G. Bush
Data I/O Corp.  Redmond, WA		| "George Bush is a liar" -S. Hussein
paul@data-io.com			| "You're a liar!" - Johnny Rotten
					| "Liar, liar, pants on fire" - kids

tad@ssc.UUCP (Tad Cook) (01/10/91)

In article <1991Jan6.213544.5386@techbook.com>, tedpan@techbook.com (Teddy Panarto) writes:
> I've been looking for a DTMF decoder chip, NOT the chips that generate
> DTMF tone, but the ones that decode the tones to binary (for example) output.
> One that I know of is M-956, made by Teltone, but I have no luck on finding
> the company. Signetics also makes them, I believe.

Teltone makes some very nice touchtone decoder chips.  Their address:

Teltone Corp.
10801 120th Ave. NE
Kirkland, WA 98033-5094

phone: 206-827-9626



Tad Cook
Seattle, WA
Packet: KT7H @ N7HFZ.WA.USA.NA
Phone: 206/527-4089 
MCI Mail: 3288544 
Telex: 6503288544 MCI UW  
USENET:...uw-beaver!sumax!amc-gw!ssc!tad
or, tad@ssc.UUCP

tad@ssc.UUCP (Tad Cook) (01/10/91)

In article <80276@sgi.sgi.com>, rpw3@rigden.wpd.sgi.com (Rob Warnock) writes:
> In article <1991Jan6.213544.5386@techbook.com> tedpan@techbook.com
> (Teddy Panarto) writes:
> +---------------
> | I've been looking for a DTMF decoder chip, NOT the chips that generate
> | DTMF tone, but the ones that decode the tones to binary (for example) output.
> | One that I know of is M-956, made by Teltone, but I have no luck on finding
> | the company. Signetics also makes them, I believe. I live in Portland,
> | Oregon, so if anyone can help me on where to find such chips, I'd be very
> | grateful. It really doesn't matter what company makes the chips, as long as
> | it's a DTMF decoder with (preferrably) binary output.
> +---------------
> 
> Believe it or not, try your local Radio-Shack. They stock the Silicon Systems
> SSI-102 (?) which is exactly what you're asking for. (I could be off a bit on
> the part number.)
> 

Radio Shack no longer carries the SSI touchtone decoder chips.  SSI is
still in business though:

Silicon Systems
14351 Mylford Road
Tustin, CA  92680

phone: 714-731-7110





Tad Cook
Seattle, WA
Packet: KT7H @ N7HFZ.WA.USA.NA
Phone: 206/527-4089 
MCI Mail: 3288544 
Telex: 6503288544 MCI UW  
USENET:...uw-beaver!sumax!amc-gw!ssc!tad
or, tad@ssc.UUCP

marshall@col.hp.com (Marshall Boss) (01/10/91)

     Try a Motorola MC145436.  It's listed in their Telecommunications 
     Device Data book on page 2-540.

     The part is a 14 pin dip.  It requires an external colorburst 
     crystal and a 1meg resistor.  All you do is pump your signal in
     one pin and you get a 4-bit binary code and a data valid signal.

     Dead easy ... Can't go wrong.

     Marshall Boss

gd@erg.sri.com (Greg DesBrisay) (01/10/91)

Teltone is located in Kirkland, Washington.  Their address and
telephone numbers are:

Teltone Corporation
10801-120th Avenue NE
Kirkland, WA 98033
Phone: 800-426-3926 or 206-827-9626
Fax: 206-827-6050
TWX: 910-449-2862


Greg

gd@erg.sri.com (Greg DesBrisay) (01/10/91)

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

vail@tegra.COM (Johnathan Vail) (01/16/91)

In article <80276@sgi.sgi.com> rpw3@rigden.wpd.sgi.com (Rob Warnock) writes:

   In article <1991Jan6.213544.5386@techbook.com> tedpan@techbook.com
   (Teddy Panarto) writes:
   +---------------
   | I've been looking for a DTMF decoder chip, NOT the chips that generate
   | DTMF tone, but the ones that decode the tones to binary (for example) output.
   | One that I know of is M-956, made by Teltone, but I have no luck on finding
   | the company. Signetics also makes them, I believe. I live in Portland,
   | Oregon, so if anyone can help me on where to find such chips, I'd be very
   | grateful. It really doesn't matter what company makes the chips, as long as
   | it's a DTMF decoder with (preferrably) binary output.
   +---------------

   Believe it or not, try your local Radio-Shack. They stock the Silicon Systems
   SSI-102 (?) which is exactly what you're asking for. (I could be off a bit on
   the part number.)

These are pretty good chips.  I have had some experience with them.
One suggestion is to get the ap-notes from SSI and add their
pre-filter.  That allows it to pick tones "out of the mud" or so I am
told.

Hope this helps, jv



"A screaming comes across the sky"
 _____
|     | Johnathan Vail | n1dxg@tegra.com
|Tegra| (508) 663-7435 | N1DXG@448.625-(WorldNet)
 -----  jv@n1dxg.ampr.org {...sun!sunne ..uunet}!tegra!vail

tad@ssc.UUCP (Tad Cook) (01/19/91)

In article <1930@atlas.tegra.COM>, vail@tegra.COM (Johnathan Vail) writes:
> In article <80276@sgi.sgi.com> rpw3@rigden.wpd.sgi.com (Rob Warnock) writes:
> 
>    In article <1991Jan6.213544.5386@techbook.com> tedpan@techbook.com
>    (Teddy Panarto) writes:
>    +---------------
>    | I've been looking for a DTMF decoder chip, NOT the chips that generate
>    | DTMF tone, but the ones that decode the tones to binary (for example) output.
> 
>    Believe it or not, try your local Radio-Shack. They stock the Silicon Systems
>    SSI-102 (?) which is exactly what you're asking for. (I could be off a bit on
>    the part number.)
> 

Radio Shack no longer stocks the SSI DTMF chips.  Here is SSI's address:

Silicon Systems
14351 Myford Road
Tustin, CA  92680

phone: 714-731-7110

Teltone also makes DTMF decoders.  Their phone number is 206-827-9626.



Tad Cook
Seattle, WA
Packet: KT7H @ N7HFZ.WA.USA.NA
Phone: 206/527-4089 
MCI Mail: 3288544 
Telex: 6503288544 MCI UW  
USENET:...uw-beaver!sumax!amc-gw!ssc!tad
or, tad@ssc.UUCP