CMX7262L9

Telecom Overview

The CMX7262L9 is a professional radio vocoder IC supporting Tri-wave Excited Linear Prediction (TWELP) technology. It operates on a single 3.3V supply and features an integrated voiceband audio codec, eliminating the need for external DSPs or codecs. The device supports half-duplex operation with built-in Forward Error Correction (FEC) and noise reduction functions. It interfaces via a C-BUS host serial interface with streaming registers to reduce latency. The component is housed in a 64-pin LQFP package.

Telecom Feature Summary

• Implements TWELP vocoding for high-performance, low bit rate speech encoding and decoding.
• Integrates analogue-to-digital and digital-to-analogue converters for direct audio interfacing.
• Supports flexible signal routing between C-BUS transfers and analogue audio inputs/outputs.
• Includes auxiliary functions such as GPIOs, differential audio outputs, and speaker drivers.

Telecom Applications

• Half duplex digital radio systems
• Secure digital voice communications
• Digital Software Defined Radio (SDR)
• VoIP applications

Telecom Procurement Notes

Verify the specific ordering suffix 'L9' corresponds to the 64-LQFP package variant when sourcing. Confirm that the Function Image™ configuration matches the intended application requirements, as device functionality is defined by uploaded data files during initialization. Ensure compatibility with the host microcontroller's C-BUS interface timing specifications.

Telecom Selection Notes

Select this component for applications requiring integrated TWELP vocoding without external processing units. Consider the 64-pin LQFP package for through-hole or standard surface mount assembly needs. Evaluate power consumption requirements against the available powersave modes if battery operation is critical. Verify that the host system can support the required SPI or C-BUS communication protocols for Function Image™ loading.

Telecom Part Context

The CMX7262L9 belongs to the CMX7262 family of communication semiconductors from CML Microcircuits. It utilizes FirmASIC technology, allowing functional customization via uploaded Function Image™ files. This flexibility enables in-field upgrades and adaptation to various digital radio standards, including dPMR configurations when paired with compatible modem ICs like the CMX7141.

Telecom Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should verify pinout and electrical compatibility if considering alternative vocoder ICs from other manufacturers.