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[SOLVED] MT8870 o/p does not go to zero when after removing the dtmf input

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alisufian

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hey everyone ,
MT8870 o/p does not go to zero when there is no dtmf input, mean when i input a dtmf tone i can see o/p on Q1 Q2 Q3 and Q4 pins , but as i remove the dtmf i/p the previous o/p do not disappear.
plz do me favor. and sorry in advance for my bad english
 

That would appear to be the correct behavior from the datasheet. You need to monitor the StD pin.

Keith
 
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