SI32287-A-GMR

Telecom Overview

The Si32287-A-GMR is a dual-channel Foreign Exchange Station (FXS) telephony interface within the Si3228x ProSLIC family. It integrates two complete FXS channels in an 8 x 8 mm 56-pin QFN package, operating from a 3.3 V supply with a maximum battery voltage of -106 V and an industrial temperature range of -40 °C to +85 °C. The device supports PCM interfaces with daisy-chain mode, DTMF detection, and Smart Ringing capabilities. Key features include built-in DC-DC controllers for optimized power efficiency, wideband audio support, and comprehensive line diagnostics.

Telecom Feature Summary

• Dual FXS channels integrated into a single compact package
• PCM interface with daisy-chain mode and DTMF detection
• Smart Ringing technology reduces peak current requirements
• Integrated DC-DC controllers for efficient battery voltage generation

Telecom Applications

• VoIP gateways and routers
• Analog Terminal Adapters (ATA)
• Private Branch Exchange (PBX) systems
• Wireless Local Loop (WLL) terminals

Telecom Procurement Notes

Verify the specific ordering suffix against official Skyworks documentation to confirm package type and temperature rating. Confirm RoHS compliance status and moisture sensitivity level prior to assembly. Ensure design compatibility with the required 3.3 V supply and PCM interface specifications.

Telecom Selection Notes

Select this component when dual FXS functionality is required alongside PCM connectivity and DTMF detection. The industrial temperature range (-40 °C to +85 °C) suits demanding environments. Verify that the 56-pin QFN footprint aligns with the PCB layout constraints and that Smart Ringing benefits are necessary for the target application's power budget.

Telecom Part Context

This part belongs to the Si3228x series of Dual ProSLIC devices. It shares core architecture with variants like the Si32286 but adds DTMF detection and Smart Ringing features. The 'G' suffix indicates the extended industrial temperature range compared to the 'F' commercial variant.

Telecom Replacement Considerations

The Si32286-A-GM serves as a functional substitute lacking DTMF detection and Smart Ringing. The Si32287-A-FM offers identical features but operates within the commercial temperature range (0 °C to +70 °C). Verify pinout and software compatibility before substitution.