SI32283-A-GMR

Telecom Overview

The Si32283-A-GMR 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 3.3 V supply and supports PCM/SPI digital interfaces with daisy-chain mode capability. Key technical specifications include a maximum battery voltage of -106 V, DTMF detection functionality, and support for wideband audio. The operating temperature range extends from -40 °C to +85 °C.

Telecom Feature Summary

• Integrates two complete FXS channels performing all BORSCHT functions in a single package
• Features built-in DSP, monitor ADC, and test load to facilitate self-testing and metallic loop testing
• Includes flexible integrated tracking DC-DC controller supporting low-cost capacitive boost configuration
• Supports Smart Ringing technology to reduce peak current requirements

Telecom Applications

• VoIP gateways and routers
• xDSL IADs
• Optical Network Terminals/Units (ONT/U)
• Analog Terminal Adapters (ATA)

Telecom Procurement Notes

Verify the specific ordering suffix against official Skyworks documentation to confirm packaging format and environmental compliance. Confirm that the GMR suffix corresponds to tape and reel packaging as indicated in the manufacturer's ordering guide. Ensure compatibility with the required industrial temperature range and interface protocols before finalizing procurement.

Telecom Selection Notes

Select this component when a dual-channel FXS solution with PCM interface and DTMF detection is required. The device is suitable for applications needing wideband voice quality and efficient power management via integrated DC-DC controllers. Consider the 56-pin QFN footprint and -40 °C to +85 °C operating range for industrial or commercial deployment constraints.

Telecom Part Context

The Si32283-A-GMR belongs to the Si3228x family of Dual ProSLIC devices. This series provides comprehensive telephony interface capabilities, including programmable AC impedance, hybrid balance, and line diagnostics. The family supports both ISI and PCM interfaces across various package options to accommodate different system integration needs.

Telecom Replacement Considerations

The Si32283-A-FM serves as a commercial-grade alternative with identical electrical features but a restricted 0 to 70 °C operating temperature range. Other family members like the Si32282-A-GMR lack DTMF detection, while the Si32287-A-GMR adds Smart Ringing capabilities.