CMX882 Baseband Processor for Leisure Radios with Data

Brief Description
CMX882, a full-function half-duplex audio and signalling processor IC for FRS and PMR446 type facilities suitable for both complex and simple end-designs. Under the control of the host μC, all voiceband requirements are catered for: voiceband and sub-audio filtering, pre/de-emphasis, compression and expansion and audio routing and global level setting with single or two-point modulation in the transmit path.
The combination of new and standard signalling functions of this product offer, under software control, increased functionality, versatility and privacy. Standard Extended-Code CTCSS and DCS functions are integrated with the new XTCSS code implementation. XTCSS provides additional and improved squelchcentred privacy codes with the added advantage of "silent operation"; no annoying interference from other sub-audio users. XTCSS fitted radios enjoy more privacy and flexibility of operation.
For advanced and enhanced radio operation, the CMX882 provides a 1200/2400 bps free-format and packet data FFSK/MSK modem for text messaging/paging, passing GPS location data (compatible with NMEA 0183) and other data applications.
With ultra low power requirements and graduated powersave, this product only requires a smaller, lower power μC than existing FRS/PMR446 solutions. It is available in compact SSOP and TSSOP packages.