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August, 2019 CML: Frequency Inversion Audio Scrambler
Winston-Salem, NC — Recognizing the growing need to protect commu- nication systems from the threat of being compromised by unauthorized parties, CML Microcircuits has intro- duced the CMX7158. Based on the company’s proprietary FirmASIC® technology to facilitate configuration, this compact user-programmable scrambler IC is optimized for inclu- sion in multifunction audio systems, as well as handheld wireless/cellular equipment. Maintaining good audio quality,
it can rapidly switch between clear and scrambled voice modes through a programmable frequency inversion
point, with minimal delay. Fur - thermore, its completely independ- ent Tx and Rx signal paths make the IC capable of full duplex operation. Due to FirmASIC, a Function
Image™ is generated in which the CMX7158’s functional parameters are defined. This is loaded to the sys-
tem upon power-up/device initializa- tion — either from the system’s host microcontroller (across the C-BUS interface) or through an attached serial
flash memory. Dual-tone
multi-frequency (DTMF) encode/ decode, Selcall signaling and VOX detection on both channels are among the other main features encompassed. Key applications
for the CMX7158 audio scrambler IC.
CMX7158 include cellular radio accessories, Bluetooth headsets, wired/wireless access control sys- tems, private mobile radio (PMR) and land mobile radio (LMR) radio hardware, as well as legacy wireline
telephony. Supplied in a space-sav- ing 48-pin VQFN package, it sup- ports low-power operation (drawing from a 3 to 3.6V source, with power conserving modes available). The numerous analog audio interfaces incorporated make integration into existing system designs very straightforward. To assist engineers during the development process, CML offers the PE0402 evaluation
board to accompany the CMX7158. Contact: CML Microcircuits
(USA), Inc., 486 N. Patterson Avenue, Suite 301, Winston-Salem, NC 27101 % 336-744-5050 fax: 336-744-5054 E-mail:
us.sales@
cmlmicro.com Web:
www.cmlmicro.com
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