SI32261-C-GM2

Telecom Overview

The SI32261-C-GM2 is a dual Foreign Exchange Station (FXS) interface integrated circuit from the ProSLIC family, manufactured by Skyworks Solutions Inc. It integrates two complete telephony channels within an 8 x 8 mm 60-pin QFN package. The device operates on a single 3.3 V supply and supports battery voltages up to -140 V. Key electrical specifications include a supply voltage range of 3.13 V to 3.47 V, a maximum DC feed current of 45 mA, and a typical idle channel noise of 8 dBrnC. It features built-in dc-dc controllers for optimized power efficiency and supports wideband audio.

Telecom Feature Summary

• Integrates two complete FXS channels with BORSCHT functionality in a compact 60-pin QFN package
• Includes internal balanced or unbalanced ringing generators with adaptive and low-power capabilities
• Supports PCM and SPI bus digital interfaces alongside software-programmable line parameters
• Features integrated dc-dc controllers compatible with full tracking, shared supplies, or fixed rails

Telecom Applications

• VoIP gateways and routers
• xDSL Integrated Access Devices (IADs)
• Optical Network Terminals/Units (ONT/U)
• Analog Terminal Adapters (ATA)

Telecom Procurement Notes

Verify the specific suffix 'GM2' against official Skyworks documentation to confirm temperature grade and packaging details. Ensure compatibility with existing hardware designs regarding the 60-pin QFN footprint and thermal requirements. Confirm that the -140 V rating aligns with the target application's line voltage standards.

Telecom Selection Notes

Select this component when designing systems requiring dual-channel analog telephone interfaces with high voltage support. The -140 V rating distinguishes it from lower-voltage variants suitable for standard PSTN environments. Consider the wideband audio capability and programmable impedance settings for optimizing voice quality and loop performance.

Telecom Part Context

This part belongs to the Si32260/1 Dual ProSLIC family, which combines SLIC and CODEC functionality into a single CMOS device. The series is designed to replace traditional discrete solutions, offering reduced board space and simplified configuration through supported APIs. It serves as a core interface for modern telecommunications equipment.

Telecom Replacement Considerations

Direct replacements include other variants within the Si32260/1 family, such as the Si32261-C-FM2, depending on required operating temperature ranges and battery voltage ratings. Verify pinout compatibility and software configuration portability before substitution.