SI32287-A-GM

Telecom Overview

The Si32287-A-GM is a dual Foreign Exchange Station (FXS) telephony interface IC from the Skyworks Si3228x series. It integrates two complete FXS channels within an 8 x 8 mm 56-pin QFN package. The device operates on a single 3.3 V supply and supports PCM/SPI digital interfaces with daisy-chain mode capability. Key functionalities include wideband audio processing, DTMF detection, Smart Ringing, and integrated DC-DC controllers for battery voltage generation. It performs all BORSCHT functions and supports loop or ground start operations.

Telecom Feature Summary

• Dual-channel architecture providing two complete FXS interfaces in a compact package
• Integrated DSP supporting wideband voice, DTMF detection, and Smart Ringing
• Flexible tracking DC-DC controller optimized for capacitive boost configurations
• Comprehensive software-programmable parameters including impedance and line feed thresholds

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 to confirm package type and temperature range. The 'GM' suffix indicates an industrial temperature range of -40°C to +85°C. Confirm RoHS compliance status and packaging format requirements before finalizing procurement orders.

Telecom Selection Notes

Select this model when dual FXS channels are required alongside PCM interface support and DTMF detection capabilities. The inclusion of Smart Ringing makes it suitable for applications needing reduced peak current consumption. Ensure the host system supports the necessary PCM/SPI interface protocols and provides adequate thermal management for the QFN562 package.

Telecom Part Context

This component belongs to the Si3228x family of Dual ProSLIC devices. It shares core architectural features with siblings like the Si32286-A-GM but adds DTMF detection functionality. The device represents a consolidated solution for replacing discrete telephony interface components in modern communication hardware.

Telecom Replacement Considerations

Direct replacements within the same family include the Si32286-A-GM if DTMF detection is not required. For ISI interface variants, consider the Si32285-A-GM. Verify pin compatibility and software API support when migrating between different models in the Si3228x series.

Telecom FAQ

What digital interface does the Si32287-A-GM support?

It supports PCM/SPI interfaces with daisy-chain mode capability.

Does this device support DTMF detection?

Yes, the Si32287-A-GM includes built-in DTMF detection functionality.

What is the maximum battery voltage supported?

The device supports a maximum battery voltage of -106 V.