Enable greater robustness against security breaches with frequency inversion audio scrambler

Understanding the growing demand to defend communication systems from the menace of being compromised by unauthorised individuals, CML Microcircuits has launched the CMX7158. Based on the company’s proprietary FirmASIC technology, to facilitate configuration, this compact user-programmable scrambler IC is optimised for incorporation in multi-function audio systems, as well as handheld wireless/cellular equipment.

Sustaining high levels of audio quality, it can quickly switch between clear and scrambled voice modes through a programmable frequency inversion point, with minimum delay being experienced. Moreover, its entirely independent Tx and Rx signal paths indicate that this IC is capable of full duplex operation.

Key applications for the device incorporate cellular radio accessories. Bluetooth headsets, wired/wireless access control systems, plus PMR and LMR radio hardware, as well as legacy wireline telephony. Supplied in a space-saving 48-pin VQFN package, it supports low power operation (drawing from a 3V-3.6V source, with power conserving modes available). The many analogue audio interfaces included making integration into current system designs straightforward. To aid engineers throughout the development process, the company provides the PE0402 evaluation board to accompany the device.