Cm8870 Circuit Diagram
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![Pin configuration of MT8870 DTMF decoder 2.2.1 DTMF Decoder Circuit](https://i2.wp.com/www.researchgate.net/profile/Bernard_Okon/publication/307477088/figure/download/fig1/AS:401080581148674@1472636470791/Pin-configuration-of-MT8870-DTMF-decoder-221-DTMF-Decoder-Circuit-Unit-design-Figure-6.png)
Pin configuration of mt8870 dtmf decoder 2.2.1 dtmf decoder circuit
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![Problems with MT8870 DTMF Decoder](https://i2.wp.com/i92.photobucket.com/albums/l34/VegaObscura3/MT8870.jpg)
![embedded-electronics: RF module based Remote control (DTMF IC)](https://2.bp.blogspot.com/-KkZcgEWp-PM/URXriiVLe3I/AAAAAAAAAGU/TYcobj9Riac/s1600/u.png)
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![What if you could call your house, type a few keys on your phone and](https://i2.wp.com/afiata.com/wp-content/uploads/2010/09/Phone-Line-Controller-using-CM8870-PIC16F84A-4N35-BC547-7805.jpg)
![ctcss decoder encoder, sub audio tone, subtone, 88,5Hz, Tone squelch](https://i2.wp.com/www.qsl.net/oe3mzc/mt8870.gif)
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![CM8870 datasheet - CMOS Integrated DTMF Receiver](https://i2.wp.com/www.digchip.com/image-datasheet/077/CM8870.jpg)