Pin configuration of mt8870 dtmf decoder 2.2.1 dtmf decoder circuit Decoder dtmf roll zoom over Decoder dtmf circuit diagram keypad microcontroller
ctcss decoder encoder, sub audio tone, subtone, 88,5Hz, Tone squelch
Datasheet dtmf digchip
Cm8870 datasheet
Ctcss decoder encoder, sub audio tone, subtone, 88,5hz, tone squelch .
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