flloyd@L1-A.West.Sun.COM (Fred Lloyd SUN Phoenix SE 602-275-5537 x17) (04/23/91)
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. Thanks in advance - -fred -- | Fred Lloyd AA7BQ Fred.Lloyd@West.sun.com | | Sun Microsystems, Inc. ...sun!flloyd | | Phoenix, AZ (reality -- what a concept!) (602) 275-4242 |
sp@questor.wimsey.bc.ca (Steve Pershing) (04/25/91)
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. Check out Sierra Semiconductor's SC11202/sc11203/sc11204 DTMF receivers. They all take a standard TV color-burst crystal (3.58Mhz) and are available in DIP and SOIC packages. Sierra is in San Jose at 2075 N. Capitol Avenue, 95132, tel: 408 263 9300, and has a Fax at 408 263 3337. Hope that helps. --- Steve Pershing, System Administrator : The QUESTOR Project: FREE Usenet News/Internet Mail; Sci, Med, AIDS, more : :===========================================================================: : Internet: sp@questor.wimsey.bc.ca : POST: 1027 Davie Street, Box 486 : : Phones: Voice/FAX: +1 604 682 6659 : Vancouver, British Columbia : : Data/BBS: +1 604 681 0670 : Canada V6E 4L2 :
whinery@hale.ifa.hawaii.edu (Alan Whinery) (04/25/91)
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 have only ever seen two -- the SSI201P and SSI202P, which are made by Silicon Systems, Inc.. The specs are easy to come by, but I don't know of any suppliers. Radio Shack showcased the 201 a couple of years ago, but no longer sells them. Alan whinery@hale.ifa.hawaii.edu -- ========================================================================= | D. Alan Whinery| The Institute for Astronomy, University of Hawaii | | Technical Genius| Internet: whinery@hale.ifa.hawaii.edu | | Potential Writer| 71350.3005@compuserve.com
dcl@gvgspd.GVG.TEK.COM (D.C. Ladner) (04/26/91)
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. Try OKI Semiconductor MSM6920RS or 6945 .... Single chip solution. ~dcl --------------------------------------------------------------------------- |\/\/\/| dcl@gvgspd.GVG.TEK.COM | | ___________________________ D.C. Ladner | | / \ DSD Engineering | (o)(o) | Who said that ...... | Grass Valley Group C _) \___________________________/ Grass Valley, California | ,___| __/ (916) 478 - 4072 | / DISCLAIMER: YES INDEED! /----\ -----------------------------------------------------------------
Ed_Meyer@mindlink.bc.ca (Ed Meyer) (04/26/91)
In addition to the offering by Sierra and Motorola, there is also a company called Teltone (or very close to that spelling) which, if memory serves, also offer DTMF encoder/decoder ICs. Ed Meyer
cyborg@kauri.vuw.ac.nz (Alex Ivopol) (04/27/91)
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. Check out the MC145436 (Motorola). It has 4 bit output with strobe, decodes all 16 tones, outputs can be placed into high impedance mode. From memory, the only external components are a 3.579545Mhz Xtal in parallel with a 1Mohm resistor. It provides an output clock for chaining several such devices from a single Xtal. Maximum supply voltage is 6v. I got the data sheet somewhere around here so if anyone is interested I can mail more info... -- Alex T. IVOPOL cyborg@kauri.vuw.ac.nz
sp@questor.wimsey.bc.ca (Steve Pershing) (04/28/91)
Ed_Meyer@mindlink.bc.ca (Ed Meyer) writes: > In addition to the offering by Sierra and Motorola, there is also a company > called Teltone (or very close to that spelling) which, if memory serves, also > offer DTMF encoder/decoder ICs. Ed is right... (I forgot about that one!) In case you have trouble locating them, they are in Seattle, Wa. (or one of its many suburbs). --- Steve Pershing, System Administrator : The QUESTOR Project: FREE Usenet News/Internet Mail; Sci, Med, AIDS, more : :===========================================================================: : Internet: sp@questor.wimsey.bc.ca : POST: 1027 Davie Street, Box 486 : : Phones: Voice/FAX: +1 604 682 6659 : Vancouver, British Columbia : : Data/BBS: +1 604 681 0670 : Canada V6E 4L2 :
robf@mcs213j.cs.umr.edu (Rob Fugina) (04/29/91)
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