Seeking a DTMF tone detector IC

Guest
I am searching for a DTMF decoder chip.

The 8870 was the device of choice, but that kind of gives away my age, as
it is obsolete.

icmaster.com sends me off looking for several:

TSC75T204 TDK
CD22204 Intersil

and a couple others I cannot recall, and each manufacturers website comes
up with nothing on a search. I am a contract designer, and new to the
area, so I don't have a lot of sales contacts yet to help push this chase
down the road. Digikey, Mouser, et al don't seem to have any DTMF chips.

Does anyone have knowledge or suggestions for a DTMF tone detector IC that
is actually available?


Much obliged for an help.

John
 
I've got a few of the Motorola decoder chips around here.Found them when I
went looking for a DS1287.
Also found 2102 AND 5102 RAM chips as well as a whack of other 'oddball'
items.
Jay in Ontario
 
<uvcceet@juno.com> wrote in message
news:41e839e1$2$woehfu$mr2ice@news.aros.net...
I am searching for a DTMF decoder chip.

The 8870 was the device of choice, but that kind of gives away my age, as
it is obsolete.
Click to expand...
Now that's depressing ... that is the first one I thought of also !! ;-)

mikey
 
Generation and Recognition of DTMF Signals With the Microcontroller MSP430

http://www-s.ti.com/sc/psheets/slaae16/slaae16.pdf

uvcceet@juno.com wrote:
I am searching for a DTMF decoder chip.

The 8870 was the device of choice, but that kind of gives away my age, as
it is obsolete.

icmaster.com sends me off looking for several:

TSC75T204 TDK
CD22204 Intersil

and a couple others I cannot recall, and each manufacturers website comes
up with nothing on a search. I am a contract designer, and new to the
area, so I don't have a lot of sales contacts yet to help push this chase
down the road. Digikey, Mouser, et al don't seem to have any DTMF chips.

Does anyone have knowledge or suggestions for a DTMF tone detector IC that
is actually available?


Much obliged for an help.

John
Click to expand...
 
Subject: Seeking a DTMF tone detector IC
From: uvcceet@juno.com
Date: 1/14/05 1:29 PM Pacific Standard Time

I am searching for a DTMF decoder chip.

The 8870 was the device of choice, but that kind of gives away my age, as
it is obsolete.

icmaster.com sends me off looking for several:

TSC75T204 TDK
CD22204 Intersil

and a couple others I cannot recall, and each manufacturers website comes
up with nothing on a search. I am a contract designer, and new to the
area, so I don't have a lot of sales contacts yet to help push this chase
down the road. Digikey, Mouser, et al don't seem to have any DTMF chips.

Does anyone have knowledge or suggestions for a DTMF tone detector IC that
is actually available?

I did a project in 2001 that used chips I got from Teltone, however I just went
Click to expand...
to their site for you and it looks like they no longer sell chips.

Sorry, I tried


Rocky
 
On Fri, 14 Jan 2005 14:29:43 -0700, uvcceet@juno.com wrote:

I am searching for a DTMF decoder chip.

The 8870 was the device of choice, but that kind of gives away my age, as
it is obsolete.

icmaster.com sends me off looking for several:

TSC75T204 TDK
CD22204 Intersil

and a couple others I cannot recall, and each manufacturers website comes
up with nothing on a search. I am a contract designer, and new to the
area, so I don't have a lot of sales contacts yet to help push this chase
down the road. Digikey, Mouser, et al don't seem to have any DTMF chips.

Does anyone have knowledge or suggestions for a DTMF tone detector IC that
is actually available?


Much obliged for an help.

John
Click to expand...
You could try the LM567 tone decoder chip - if I remember correctly you'll probably need to use
several of these if you need to decode multiple tones.

Oz-Rod
 
I have several of the 8870 chips in storage. Don't know how many until I
dig them up, but there should be 50-100 of them. If you're interested,
email me and I'll dig them out.

Len


uvcceet@juno.com wrote in news:41e839e1$2$woehfu$mr2ice@news.aros.net:

I am searching for a DTMF decoder chip.

The 8870 was the device of choice, but that kind of gives away my age,
as it is obsolete.

icmaster.com sends me off looking for several:

TSC75T204 TDK
CD22204 Intersil

and a couple others I cannot recall, and each manufacturers website
comes up with nothing on a search. I am a contract designer, and new
to the area, so I don't have a lot of sales contacts yet to help push
this chase down the road. Digikey, Mouser, et al don't seem to have
any DTMF chips.

Does anyone have knowledge or suggestions for a DTMF tone detector IC
that is actually available?


Much obliged for an help.

John
Click to expand...
 
Very much obliged to everyone who took the time to point me towards
sources of DTMF tone detectors.

I am happy to have found a source for the venerable 8870, but am somewhat
miffed at all the vendors and web sites that declared it dead and gone.
icmaster.com does not even have it in its archives.

I haven't used the eem/icmaster web site much. Is it that unreliable? I
used to use their catalogs all the time, and even was thrilled when it
went to CD, pre-www.

Digikey, mouser, newark, etc, all have no reference to any decoders, so it
was nice to find so many folks who know so much and could help me out.

I need the source for a client's project, but I thank all those who
offered a few, and dozens, if I needed them.

Once you get past the politics, there is still a lot of good help and
advice to be had. :)

Thanks a lot,

John
 
I read in sci.electronics.design that uvcceet@juno.com wrote (in
<41e96d57$2$woehfu$mr2ice@news.aros.net>) about 'Found a DTMF tone
detector IC', on Sat, 15 Jan 2005:

Once you get past the politics, there is still a lot of good help and
advice to be had. :)
Click to expand...
If you mean the political discussions here on s.e.d., a lot of that is
because we don't have enough interesting electronics problems brought to
us. I was very surprised at the volume of the thread on speech
compression.
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
 
<uvcceet@juno.com> wrote in message
news:41e839e1$2$woehfu$mr2ice@news.aros.net...
I am searching for a DTMF decoder chip.

The 8870 was the device of choice, but that kind of gives away my age, as
it is obsolete.

icmaster.com sends me off looking for several:

TSC75T204 TDK
CD22204 Intersil

and a couple others I cannot recall, and each manufacturers website comes
up with nothing on a search. I am a contract designer, and new to the
area, so I don't have a lot of sales contacts yet to help push this chase
down the road. Digikey, Mouser, et al don't seem to have any DTMF chips.

Does anyone have knowledge or suggestions for a DTMF tone detector IC
that
is actually available?


Much obliged for an help.

John
Click to expand...

Zarlink appears to be still supplying these ICs.

http://products.zarlink.com/product_profiles/MT8870D.htm


Good luck.

John
 
Found another decoder chip for you - MC145436

Here in good ole AUS - www.jaycar.com.au - have them for A$7.50.

Cheers

On Fri, 14 Jan 2005 14:29:43 -0700, uvcceet@juno.com wrote:

I am searching for a DTMF decoder chip.

The 8870 was the device of choice, but that kind of gives away my age, as
it is obsolete.

icmaster.com sends me off looking for several:

TSC75T204 TDK
CD22204 Intersil

and a couple others I cannot recall, and each manufacturers website comes
up with nothing on a search. I am a contract designer, and new to the
area, so I don't have a lot of sales contacts yet to help push this chase
down the road. Digikey, Mouser, et al don't seem to have any DTMF chips.

Does anyone have knowledge or suggestions for a DTMF tone detector IC that
is actually available?


Much obliged for an help.

John
Click to expand...
 
I've got those Moto parts here,just pay for the postage and handling from
Hamilton,Ontario.
I gota clean out the shop pretty soon.......ugh, I'm drowning in the 'neat
old stuff'

Jay
 
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