CMX883 Baseband Processor for Leisure Radios

Brief Description
CMX883, a full-function half-duplex audio and signalling processor IC for FRS and PMR446 type facilities 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 are integrated with the new XTCSS code implementation. XTCSS provides additional and improved squelch-centred privacy codes with the added advantage of "silent operation"; no annoying interference from other subaudio users. XTCSS fitted radios enjoy more privacy and flexibility of operation.
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.