SI32287-A-FM

Telecom Overview

The Si32287-A-FM is a dual Foreign Exchange Station (FXS) telephony interface IC from Skyworks Solutions. It operates on a single 3.3 V supply and integrates two complete FXS channels within an 8 x 8 mm 56-pin QFN package. The device supports PCM interfaces with daisy-chain mode, DTMF detection, and Smart Ringing capabilities. It features built-in dc-dc converter controllers for optimized battery voltage generation and includes a DSP for self-testing and metallic loop testing. The component is designed for wideband audio applications and supports standard operating temperatures ranging from 0 °C to +70 °C.

Telecom Feature Summary

• Integrates two complete FXS channels in a compact 56-pin QFN package
• Supports PCM interfaces with daisy-chain mode and DTMF detection
• Features Smart Ringing technology to reduce peak current requirements
• Includes integrated dc-dc controllers and DSP for line diagnostics

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 ordering suffix against official Skyworks documentation to confirm package type and temperature range. Ensure compatibility with required digital interfaces and check for any recent product change notifications regarding manufacturing sites or material composition before finalizing procurement plans.

Telecom Selection Notes

Select this model when dual FXS functionality with PCM daisy-chain support and DTMF detection is required. The inclusion of Smart Ringing makes it suitable for designs aiming to minimize peak current draw from AC-DC adapters. Confirm that the 0 °C to +70 °C industrial temperature range meets the environmental specifications of the target application.

Telecom Part Context

This component belongs to the Si3228x family of Dual ProSLIC devices. It shares core architecture with variants like the Si32283-A-FM but adds Smart Ringing and specific PCM daisy-chain configurations. The family provides comprehensive BORSCHT functions for analog telephony integration into digital networks.

Telecom Replacement Considerations

The Si32287-A-GM serves as the commercial-grade alternative with an extended -40 °C to +85 °C temperature range. Other family members such as the Si32283-A-FM offer similar PCM and DTMF features but lack the Smart Ringing capability found in the Si32287 series.