Home > Caelera offers Enhanced Audio Scrambler and Sub-Audio Signalling Processor ICs from CML

Caelera offers Enhanced Audio Scrambler and Sub-Audio Signalling Processor ICs from CML

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Caelera  is a supplier of semiconductors and semiconductor-based modules for electronics manufacturers and designers in Australia as well as New Zealand.  

CML Microcircuits, a leading innovator and provider of low-power semiconductors for global wireless and wireline communications markets has announced the launch of new audio scramblers and sub-audio signalling processors in its family of analogue two-way radio ICs.  

The CMX138A, an upgrade based on the hugely successful CMX138 IC is intended for use in half duplex analogue two-way radios or family radio equipment, particularly suited to enhanced MURS, GMRS, PMR446 and FRS designs.  

Highly integrated by design, the device provides user programmable frequency inversion audio scramblers with signal processing functions, CTCSS, DCS and in-band tones, allowing comprehensive voice processing and tone control.  

Key enhancements for the CMX138A include:

  • Improved limiter functions
  • Enhanced CTCSS and DCS performance
  • New input Automatic Gain Control (AGC) function
  • In-band tone operation enabled down to 288Hz
  • Improved audio compandor, which enhances the performance of compressed signals

These developments are designed to provide even greater levels of tone control and voice processing, making the CMX138A the complete audio solution.  

Other important features include: 

  • Auxiliary ADC channel
  • Auxiliary DAC interface with optional RAMDAC to facilitate transmitter power ramping
  • Auxiliary system clock output and transmit output for single-point-modulation
  • Crystal clock generator with buffered output to provide a common system clock if required

The CMX138A is available in a small, low-power (3.0V to 3.6V), 28-pin (E1) TSSOP package.

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