CMX608 datasheet(1/70 Pages) CMLMICRO

部件名	CMX608

功能描述	Integrated Input and Output Channel Filters

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制造商	CMLMICRO [CML Microcircuits]

网页	http://www.cmlmicro.com

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CML Microcircuits

COMMUNICATION SEMICONDUCTORS

CMX608/CMX618/

CMX638

RALCWI Vocoders

 2014 CML Microsystems Plc

D/608_18_38/11

September 2014

Provisional Issue

Features

Applications

 Near Toll Quality RALCWI Coding Algorithm

 Digital PMR, LMR, Voice Radio

 Multiple Bit Rate Modes:



2400 or 2750 bps



3600 bps with FEC Enabled

 Digital Trunking

 DMR TDMA

 4-bit Viterbi Soft Decision Decoding

 DMR FDMA, dPMR

 Integrated Audio CODEC (CMX618/CMX638 only)

 Digital Voice Scrambling and Encryption

 Integrated Input and Output Channel Filters

 Digital WLL

 20ms, 40ms, 60ms and 80ms Packet Lengths

 Voice Storage and Playback Systems

 No Licensing or Royalty Payments

 Regenerative Digital Voice Repeaters

 Ancillary Audio Functions:



Voice Activity Detector



Comfort Noise Generator



DTMF and Single Tone Regeneration

 Messaging Systems

 VoIP Systems

 Voice Pagers

 1.8V Low Power Operation, 3.3V Tolerant I/O

 Half-Duplex Vocoding (CMX608/CMX618)

 Small 48-pin LQFP and VQFN Packages

 Full-Duplex Vocoding (CMX638 only)

1.

Brief Description

The CMX608/CMX618/CMX638 are flexible, high integration, high performance, RALCWI (Robust

Advanced Low Complexity Waveform Interpolation) Vocoders, offering near toll quality voice at very low bit

rates. A Forward Error Correction (FEC) engine provides optimum performance in real life applications.

The RALCWI Vocoder comprises four independent functions which are selectable by the host: Voice

Encoder, FEC Encoder, Voice Decoder and FEC Decoder. The CMX608 and CMX618 are half-duplex

Vocoders and the CMX638 is a full-duplex Vocoder with integrated voice CODEC.The CMX618 includes

an integrated voice CODEC, offering a complete analogue voice to low bit rate vocoded data function, with

integrated channel filters removing the need for external components, whereas the CMX608 requires an

external voice CODEC.

CMX608/CMX618/CMX638 operate from a dual power supply (1.8V and 3.3V) and are available in both

48-pin LQFP (L4) and 48-pin VQFN (Q3) packages.

Continued overleaf .....

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