Pvt SQUELCHTM CTCSS Encoder/Decoder

The MX375 is a CMOS LSI microcircuit which combines CTCSS Encode/Decode operation with voice band frequency inversion. Frequency inversion is achieved by modulating the input Audio with a 3333 Hz Carrier frequency. Higher voice band frequencies are translated downward, and lower frequencies upward, resulting in a mirror image voice transmission. PvtSQUELCH combines CTCSS with inverted speech to prevent users from understanding each others Communications unless the transmissions are accompanied by the groups assigned Tone Its net effect is to eliminate casual eavesdropping and give mobile Radio users a certain degree of privacy at a minimal price. Up to 38 PvtSQUELCH user groups (one per CTCSS tone) CAN share a single Radio channel. With PvtSQUELCH, competing businesses CAN share a Radio channel without compromising Communications security. By Consumer Microcircuits Limited
MX375 's PackagesMX375 's pdf datasheet



MX375 Pinout will be updated soon..., now you can download the pdf datasheet to check the pinouts !
MX375 Application circuits
MX375 circuits
This is one application circuit of MX375,If you need more circuits,please download MX375's pdf datasheet.


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