SI32286-A-FM

Telecom Overview

The Si32286-A-FM is a dual-channel Foreign Exchange Station (FXS) telephony interface IC from the Skyworks Si3228x ProSLIC family. It integrates two complete FXS channels within an 8 x 8 mm 56-pin QFN package, operating on a single 3.3 V supply. The device supports PCM interfaces with daisy-chain mode and features Smart Ringing to reduce peak current consumption. Key capabilities include wideband audio processing, DTMF generation, programmable AC impedance, and integrated DC-DC controllers for optimized battery voltage tracking.

Telecom Feature Summary

• Dual FXS channel integration in a compact QFN56 package
• Smart Ringing technology for reduced peak current and lower-cost adapter requirements
• PCM interface support with daisy-chain configuration capability
• Integrated DSP for wideband voice, DTMF generation, and line diagnostics

Telecom Applications

• VoIP gateways and routers
• Analog Terminal Adapters (ATA)
• Wireless Fixed Terminals (WFT)
• Private Branch Exchange (PBX)

Telecom Procurement Notes

Verify component authenticity through authorized Skyworks distributors or direct manufacturer channels. Confirm RoHS compliance status and check for specific manufacturing lot traceability requirements before finalizing orders. Ensure packaging integrity matches standard tray specifications for surface-mount assembly processes.

Telecom Selection Notes

Select this model when PCM daisy-chain connectivity and Smart Ringing are required alongside dual FXS functionality. Compare against the Si32287 variant if DTMF detection is necessary, as this specific part number focuses on generation rather than detection. Verify that the 0 to 70 °C commercial temperature range aligns with the target application environment.

Telecom Part Context

This component belongs to the Si3228x series of Dual ProSLIC devices designed to replace traditional discrete telephony solutions. It consolidates BORSCHT functions into a single chip, reducing board space and power consumption compared to legacy designs. The FM suffix indicates the commercial temperature grade and standard tray packaging format.

Telecom Replacement Considerations

The Si32286-A-GM serves as the industrial temperature (-40 to 85 °C) equivalent. For applications requiring DTMF detection instead of generation, consider the Si32287-A-FM.