SendTo: piclist@mitvma.mit.edu

Hi again!

I want to correct and expand my last message about DTMF chips.

DTMF transmiters/generators

  Samsung KT3170 (equ Mittel 8870)
  Toshiba TC35218, TC35219 - 18 pin, 4 bit, 2.0-5.5V
  ( I think Toshiba has serial versions too, but I don't have any part number)
  NS TP5088 - 14 pin, 4 bit, 3-12V
  NS TP5089 - 16 pin, Row*Col, 3-12V


DTMF receivers

  Mittel 8880
  Motorola MC145436
  Toshiba TC35300, TC35301, 18 pin, 4 bit or 2 of 8, 5 V
          TC35304, TC35305, 14 pin, 4 bit, 5V
  ( I think Toshiba has serial versions too, but I don't have any part number)


Take a look at www.paranoia.com/~filipg. There is a DTMF FAQ covering
all about DTMF, including various chips.

Hey, why not use a software solution? Some time ago was a thread about
this. I recall there acctually is code (16C65?) available for DTMF
generation/reception.


Good luck!

P.S. sorry for such a mess...

mauricio

mauricio@arne.si
www.arne.si/~mauricio