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    Problem reading Data o/p from DTMF decoder with PIC 16F84

    dtmf 16f84a Hey people, i've connected a MITEL 8870 DTMF decoder to port b of my PIC.When i transmit a DTMF the decoder should give 5V on its data vaild and then the same voltage on it data outputs but i'm only getting 0.75 V on these outputs of the decoder. When i remove the pic and test the...

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