CMX7261L9

Telecom Overview

The CMX7261L9 is a full-duplex multi-transcoder IC manufactured by CML Micro, designed for digital voice coding and transcoding applications. It integrates multiple voice codecs including G.723.1, G.729A, G.711, Linear PCM, and CVSD within a single chip using FirmASIC® technology. The device operates on a 3.0V to 3.6V supply with typical current consumption of 670µA in idle mode. It supports configurable GPIO, programmable attenuators, and interfaces via a host C-BUS port and a separate master/slave PCM serial interface. The component is housed in a 64-LQFP (10x10) surface-mount package.

Telecom Feature Summary

• Supports multiple digital voice coding algorithms including G.723.1, G.729A, G.711, Linear PCM, and CVSD via Function Image™ upload.
• Capable of both full-duplex and half-duplex operation with selectable input/output sources such as analogue audio, C-BUS, or external PCM codec.
• Integrates auxiliary functions including configurable GPIO, programmable digitally controlled attenuators, and voice activity detection.
• Built on FirmASIC® technology allowing for flexible feature sets and potential future algorithm customization without hardware changes.

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 ordering suffix L9 corresponds to the 64-LQFP package variant when sourcing. Confirm the Function Image™ version required for the target application, as functionality depends on the uploaded data file during initialization. Check manufacturer documentation for any end-of-life notices or minimum order quantity restrictions associated with this component.

Telecom Selection Notes

Select the CMX7261L9 when a 64-pin LQFP package is required for the design layout. Ensure the system architecture supports the necessary 3.0V to 3.6V power supply rails. Verify that the host controller can communicate via the C-BUS interface and that the specific voice coding algorithms needed are supported by the available Function Images™ for this device family.

Telecom Part Context

The CMX7261L9 belongs to the CMX7261 Multi-Transcoder series from CML Micro's Dura Talk™ range. It shares core functionality with other variants like the CMX7261Q1, differing primarily in the physical package type. The L9 suffix specifically denotes the 64-LQFP (10x10mm) surface-mount package, distinguishing it from the VQFN option while maintaining identical electrical and logical performance characteristics.

Telecom Replacement Considerations

The CMX7261Q1 serves as a direct functional substitute, offering identical processing capabilities but utilizing a 64-VQFN (9x9mm) package instead of the LQFP form factor. Designers must verify footprint compatibility and thermal management requirements when switching between these package options.

Telecom FAQ

How is the functionality of the CMX7261L9 determined?

Functionality is defined by uploading a Function Image™ data file during device initialization. This allows the same silicon platform to support different combinations of voice coding algorithms.

What power supply voltages does the CMX7261L9 require?

The device requires a digital supply voltage ranging from 3.0V to 3.6V and an analogue supply voltage also ranging from 3.0V to 3.6V.

Can the CMX7261L9 operate in half-duplex mode?

Yes, the CMX7261L9 supports both full-duplex and half-duplex operation modes, allowing flexibility in how transcoder outputs are routed to various ports.