CM 8870 explanations

[rajaram04]

Hello sir

what is the basic use of CM 8870 i.c. , what we call it ?

Seems it is related to sound work , please explain in very short

 

[tpetar]

Hello sir

what is the basic use of CM 8870 i.c. , what we call it ?

Seems it is related to sound work , please explain in very short

Its DTMF decoder (receiver), decodes dual tones and . IC id is 8870 and CM is manufacturer, also there is other manufacturers of this IC with other prefix to 8870. IC decode uses digital counting techniques to detect and decode all 16 DTMF tone pairs into a 4-bit code.

Read manufacturer datasheet you will find all data what you need.





Examples:

http://www.uchobby.com/index.php/2007/09/30/phone-to-microcontroller-interfacing-with-dtmf/
http://kishorepunniyamurthy.blogspot.com/2012/07/mobile-controlled-robot-dtmf-bluetooth.html
**broken link removed**
**broken link removed**

:wink: