SI32284-A-GMR

Telecom Overview

The Si32284-A-GMR is a dual Foreign Exchange Station (FXS) telephony interface integrated circuit manufactured by Skyworks Solutions. It operates from a single 3.3 V supply and integrates two complete FXS channels within an 8 x 8 mm 48-pin QFN package. The device supports the Integrated Serial Interface (ISI) for digital connectivity. Key electrical specifications include a maximum battery voltage of -106 V and an operating temperature range of -40 °C to +85 °C. It features built-in DC-DC converter controllers, wideband audio support, and Smart Ringing capabilities.

Telecom Feature Summary

• Integrates two complete FXS channels with BORSCHT functions in a compact 48-pin QFN package
• Supports ISI digital interface and includes built-in DSP for self-testing and metallic loop testing
• Features patent-pending Smart Ringing technology to reduce peak current requirements
• Includes flexible integrated tracking DC-DC controller supporting capacitive boost configurations

Telecom Applications

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

Telecom Procurement Notes

Verify the specific ordering suffix against official Skyworks documentation to confirm package type and temperature rating. The 'G' suffix indicates an extended industrial temperature range, while 'M' denotes commercial grade. Confirm tape and reel availability if required by adding the 'R' suffix. Ensure compatibility with the host system's ISI interface protocol before procurement.

Telecom Selection Notes

Select this component when a dual-channel FXS solution with ISI interface and Smart Ringing is required. Compare against the Si32280-A-GMR if DTMF detection is not needed, or the Si32286-A-GMR if PCM interface is preferred. Verify that the application environment falls within the -40 °C to +85 °C operating range specified for the G-series devices.

Telecom Part Context

This part belongs to the Si3228x family of Dual ProSLIC devices. The family provides scalable solutions for telephony interfaces, varying by interface type (ISI vs. PCM), feature set (DTMF detection, Smart Ringing), and package size (QFN48 vs. QFN56). The Si32284 specifically targets applications requiring dual lines with intelligent ringing management via the ISI interface.

Telecom Replacement Considerations

Si32280-A-GMR: Identical package and interface but lacks Smart Ringing. Si32284-A-FM: Same features but limited to commercial temperature range. Si32286-A-GMR: Offers PCM interface instead of ISI with similar Smart Ringing features.