CMX838 FRS/PMR446/GMRS 'Family Radio' Processor

Description
The highly integrated CMX838 Family Radio Processor includes subaudio, audio, and synthesizer functions to serve as the core engine for low cost, high performance FRS, PMR446, and GMRS radio designs. Its flexibility supports both simple and advanced multi-channel radios without cost penalties. Integrated Tx voltage reference and baseband clock generation circuits eliminate the need for external components. The CMX838’s features directly supports advanced end product functions such as: group calling, scanning, automatic scanner response tone setup, and Tone Cloning™.
By using the CMX838 one global radio design can support multiple standards and markets.
Controlled via a serial interface (C-BUS) the Family Radio Processor operates from a 3V to 5V supply and is available in 28-pin TSSOP (CMX838E1) and 28-pin SOIC (CMX838D1) packages.

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Features Advanced 'Any-One-of-Any' CTCSS Sub-Audio 50-Tone Processor Fast Decode Time IRQ on Any/All Valid Tones Fast Scan, Group Calling, Auto Response Tone Select and Tone Cloning Support Supply Independent Output Level RF Synthesiser for FRS, PMR446, MURS and GMRS RF Channels Configurable Charge-Pump Audio Call Tone Generator Audio Processing Provides: Mic Amplifies, Pre and De-Emphasis, Limiter, Post Limiter Filtering, Mic, Rx and Tx Digital Gain Controls and Dual Tx Outputs Serial Control Interface Signal Source and 'External' Functions	Applications Family Radio Service (FRS) Pan-European PMR 446; Hand Portable Mobile Radio General Mobile Radio Service (GMRS) Package Styles: - CMX838D1 - CMX838E1 Supply Requirement: 2.7V power supply

Description The highly integrated CMX838 Family Radio Processor includes subaudio, audio, and synthesizer functions to serve as the core engine for low cost, high performance FRS, PMR446, and GMRS radio designs. Its flexibility supports both simple and advanced multi-channel radios without cost penalties. Integrated Tx voltage reference and baseband clock generation circuits eliminate the need for external components. The CMX838’s features directly supports advanced end product functions such as: group calling, scanning, automatic scanner response tone setup, and Tone Cloning™. By using the CMX838 one global radio design can support multiple standards and markets. Controlled via a serial interface (C-BUS) the Family Radio Processor operates from a 3V to 5V supply and is available in 28-pin TSSOP (CMX838E1) and 28-pin SOIC (CMX838D1) packages.