Telecoms, Datacoms, Wireless, IoT


Split-band scrambler for secure comms

8 November 2000 Telecoms, Datacoms, Wireless, IoT

CML has released what it says is a simple-to-use dual-mode, low-cost, voice-band scrambler to keep conversations private. The CMX264 frequency domain scrambler uses split-band frequency inversion scrambling which provides a superior level of speech privacy to single inversion methods. To further enhance security the device has 'easy-to-implement' fixed and rolling code capabilities. All the filtering required is also featured on-chip.

Typical current requirement is 3 mA at 3,0 V making the CMX264 the ideal solution for any audio application where low power consumption is critical. These include mobile radio and FRS/PMR446 handsets, both wireline and mobile telephones, fixed or rolling code voice scramblers and baby alarms. Energy efficiency is increased by the device's standby mode.

The CMX264 operates using a simple serial interface or microprocessor control. For full duplex operation Tx and Rx audio paths are separate. The device is available in a 24-pin SSOP package.





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