CMX138A Description
The CMX138A is a half-duplex, audio scrambler and sub-audio signalling processor IC for Analogue Twoway Radio applications. This makes it a suitable device for the leisure radio markets (FRS, MURS, PMR446 and GMRS). This device provides a user programmable frequency inversion audio scrambler, panding and pre/deemphasis performing simultaneous processing of Sub-audio and In-band signalling.
CMX138A Key Features
- Programmable Audio Scrambler
- Concurrent Audio/Signalling Operations
- Full Audio-band Processing: Pre and De-emphasis, pandor, Scrambler and Selectable 2.55/3 kHz Filters
- Auxiliary ADC and Auxiliary DAC
- Selectable Audio Processing Order
- Sub-audio Signalling: CTCSS, DCS
- Auxiliary System Clock Output
- Tx Output for Single-point Modulation
- Low-power (3.0V to 3.6V) Operation
- Flexible Powersave Modes
CMX138A Applications
- performing simultaneous processing of Sub-audio and In-band signalling