SI32261-C-ZM2

Telecom Overview

The Skyworks Solutions Inc. SI32261-C-ZM2 is a single-chip dual ProSLIC device implementing two complete foreign exchange station (FXS) telephony interfaces within an 8 x 8 mm 60-pin QFN package. It operates from a 3.3 V supply with a voltage range of 3.13 V to 3.47 V and supports standard PCM/SPI or GCI digital bus interfaces. The device features built-in DC-DC converter controllers for optimal battery voltage generation, supporting linefeed voltage ratings of –140 V. It provides wideband audio capabilities, DTMF detection, and comprehensive line diagnostics including metallic loop testing.

Telecom Feature Summary

• Implements two complete FXS channels performing all BORSCHT functions in a single package
• Integrates DSP-based self-testing and metallic loop testing (MLT) capabilities
• Supports wideband audio for enhanced voice quality beyond PSTN standards
• Features internal balanced or unbalanced ringing generators with adaptive control

Telecom Applications

• VoIP gateways and routers
• xDSL Integrated Access Devices (IADs)
• Analog Terminal Adapters (ATA)
• Private Branch Exchange (PBX) systems

Telecom Procurement Notes

Verify the specific suffix ZM2 against official Skyworks documentation to confirm temperature grade and packaging details. Ensure compatibility with the 60-pin QFN footprint and check for moisture sensitivity level requirements during assembly. Confirm that the –140 V rating aligns with the target high-voltage ringing application design.

Telecom Selection Notes

Select this model for applications requiring dual FXS channels with integrated DC-DC control and wideband audio support. The 8 x 8 mm package is suitable for designs needing GCI interface support, which is not available in the smaller 6 x 8 mm variant. Verify power supply constraints match the 3.3 V nominal requirement and thermal dissipation limits for the QFN-60 package.

Telecom Part Context

The SI32261-C-ZM2 belongs to the Si32260/1 family of ProSLIC devices. The 'Si32261' designation indicates a –140 V linefeed rating compared to the –110 V rating of the Si32260. This family supports both tracking and shared battery supply configurations to optimize power consumption in various telephony infrastructure deployments.

Telecom Replacement Considerations

The Si32260-C-ZM2 serves as a functional substitute if the application requires a lower –110 V linefeed rating instead of –140 V. Both devices share identical pinouts, packages, and core functionalities within the ProSLIC family.