Dtmf Decoder Mt8870. The mt8870d mt8870d 1 is a complete dtmf receiver integrating both the bandsplit filter and digital decoder functions. Dual tone multiple frequency technologies were introduced by bell labs to replace pulse dialing in telephones.
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It is a complete dtmf receiver integrating both the band split filter and digital decoding functions. Dual tone multiple frequency technologies were introduced by bell labs to replace pulse dialing in telephones. The mt8870 is a complete dtmf receiver integrating both the bandsplit filter and digital decoder functions.
This module works as a tone decoder that uses its 3 5 mm audio connector socket to get the input audio signal.
October 2006 ordering information. Mt8870 is a dtmf decoder module that generates a 4 bit digital code with respect to the dtmf audio signal. The mt8870 decoder ic is integrated with an operational amplifier with user adjustable guard time. October 2006 ordering information.
