SI32911-A-GSR

Telecom Overview

The SI32911-A-GSR is a single-channel Foreign Exchange Office (FXO) line-side device from the Si3291x family, designed to pair with Si3217x ProSLIC ICs. It operates on a 3.3 V supply voltage ranging from 3.13 V to 3.47 V with a typical supply current of 10 mA when enabled. The component provides greater than 5 kV isolation and supports transmit/receive levels up to +6 dBm. It features integrated ring detection, parallel handset detection, and programmable digital hybrid capabilities within a 16-pin SOIC package.

Telecom Feature Summary

• Patented capacitive isolation barrier exceeding 5 kV for safe connection to FXS devices
• Integrated ring detector with programmable thresholds and validation logic
• Supports Type I and II caller ID signaling alongside parallel handset detection
• Programmable digital hybrid and AC/DC termination for flexible line interfacing

Telecom Applications

• Customer Premise Equipment (CPE)
• VoIP DSL Gateways and Routers
• Wireless Local Loop (WLL) systems
• Integrated Access Devices (IAD)

Telecom Procurement Notes

Verify the specific grade suffix against the ordering guide to confirm temperature range compliance. Ensure the design includes an external DC-DC controller as the Si3291x does not generate internal battery voltages. Confirm pin compatibility with the paired Si3217x host controller during integration planning.

Telecom Selection Notes

Select this part when an FXO interface is required to connect central office lines to a digital telephony processor. It is intended for use with Si3217x series chips that implement the patented isolation technology. Verify that the application requires the specific isolation rating and signal processing features provided by the Si3291x family rather than a standalone SLIC solution.

Telecom Part Context

The SI32911-A-GSR belongs to the Si3291x family of line-side devices. These components are specifically engineered to complement the Si3217x ProSLIC family, forming a complete single-chip FXS solution with FXO options. The series enables seamless connectivity between subscriber equipment and foreign exchange office lines while maintaining electrical safety through high-voltage isolation barriers.

Telecom Replacement Considerations

The Si32911-A-FSR is a documented variant within the same family offering identical functional specifications.