CMX7261L9-TR1K

Telecom Overview

The CMX7261L9-TR1K is a full-duplex multi-transcoder IC from CML Micro, utilizing FirmASIC technology to integrate multiple digital voice coding algorithms on a single chip. It supports Linear PCM, G.711, G.729A, G.723.1, and CVSD codecs via Function Image uploads. The device operates on a 3.0V to 3.6V supply with typical current consumption of 670µA in idle mode. Processing delays range from 15ms for PCM/G.711 to 75ms for G.723.1. It features configurable GPIO, programmable attenuators, and interfaces including C-BUS and master/slave PCM.

Telecom Feature Summary

• Supports multiple digital voice coding algorithms including G.723.1, G.729A, G.711, Linear PCM, and CVSD through uploadable Function Images
• Enables both full-duplex and half-duplex operation with selectable input and output sources
• Integrates auxiliary functions such as configurable GPIO, digitally controlled attenuators, and voice activity detection
• Provides flexible interfacing options via host C-BUS port and separate master/slave PCM serial interface

Telecom Applications

• Digital radio systems
• Personal area network voice links
• Privacy-type digital voice links
• Wireless PABX
• VoIP systems

Telecom Procurement Notes

Verify the specific Function Image configuration required for your application, as codec support depends on the uploaded data file during initialization. Confirm that the L9 suffix corresponds to the 64-LQFP package type suitable for surface mount assembly. Ensure compatibility with the 3.0V to 3.6V operating voltage range and check for any end-of-life or not-for-new-designation status before finalizing procurement plans.

Telecom Selection Notes

Select this component when a single-chip solution is needed for transcoding between various legacy and modern voice codecs without an external DSP. Choose based on the required Function Image set; FI-1.x supports G.729A while FI-2.x supports G.723.1. Consider the 64-pin LQFP package for board layout constraints. Verify that the processing delay requirements align with the 15ms to 75ms latency ranges specified for different algorithms.

Telecom Part Context

The CMX7261 belongs to CML’s Dura Talk™ digital voice processor range, designed for high flexibility in digital voice coding. It leverages proprietary FirmASIC technology to combine analog, digital, firmware, and memory technologies. This family allows for customization and future algorithm updates via Function Images, offering advantages over traditional ASICs, FPGAs, and DSPs in terms of time-to-market and development risk reduction.

Telecom Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. As the CMX7261 utilizes unique FirmASIC technology and Function Image configurations, direct pin-to-pin replacements may not exist. Evaluate alternative CML Micro transcoders or general-purpose DSPs if specific algorithm support differs.