CMX885 – Marine VHF Audio and Signalling Processor

Product description

The CMX885 is a half-duplex, audio, signalling and data processing IC for use in Marine VHF radio systems.

Complete voice-band processing, filtering, pre- or de-emphasis and frequency inversion scrambling. Signal routing and filtering is included to assist host µC based signal encoding/decoding applications.

A 1200bps Digital Selcall (DSC)/Automatic Transmitter Identification System (ATIS) modem with protocol support and National Oceanic and Atmospheric Administration (NOAA) National Weather Radio (NWR) decoding are supported.

A DTMF encoder/decoder, a full complement of auxiliary ADCs and DACs and dual synthesised clock outputs are included.

The device also has flexible powersaving modes and is available in 48-pin VQFN and LQFP packages.

Read More

Devices are available through our distributors below:

Features

• Concurrent Audio, Signalling and Data Operations
• Complete Audio Band Processing:
  – Selectable Audio Processing Order
  – Pre and De-emphasis
  – Selectable 2.55/3.0 kHz Filtering
  – Limiter
• Programmable Voice-band Scrambler
• In-band Signalling:
  – DTMF
  – NOAA NWR
• DTMF and Audio Tone Encoder
• Dual Auxiliary ADC with 4 Multiplexed Inputs
• C-BUS Serial Interface to Host µController
• Four x Auxiliary DACs
• Dual Programmable System Clock Outputs
• Tx Outputs for Single or Two-point Modulation
• Three x Analogue Inputs
• Digital Gain Adjustment
• DSC/ATIS Modem for Marine Applications
• Default 3.6864MHz Xtal/Clock
• Low Power Operation with Flexible Powersave Modes
• Compact VQFN and LQFP Packages

Design resources