SI32171-C-GM1R

Telecom Overview

The Si32171-C-GM1R is a single-channel ProSLIC FXS interface IC from Skyworks Solutions. It operates on a 3.3 V supply (3.13–3.47 V) with 1.8 V or 3.3 V I/O options. The device integrates a DC-DC controller for battery voltages up to –110 V and supports PCM/SPI interfaces. Key electrical parameters include a typical operating current of 44.6 mA, an ambient temperature range of -40°C to +85°C (G-grade), and a maximum junction temperature of 145°C. It features DTMF detection, pulse metering, and wideband voice support within a 42-pin QFN package.

Telecom Feature Summary

• Performs all BORSCHT functions for complete FXS telephony solutions
• Integrates tracking DC-DC controller with direct MOSFET connection
• Supports PCM and SPI digital interfaces with programmable interrupts
• Includes internal balanced or unbalanced ringing generation

Telecom Applications

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

Telecom Procurement Notes

Verify the specific voltage rating (-110 V vs -140 V) required for the application when selecting the Si3217x-C variant. Confirm the G-grade temperature range (-40°C to +85°C) matches environmental requirements. Ensure the 42-pin QFN footprint aligns with PCB design guidelines for thermal dissipation via the exposed pad.

Telecom Selection Notes

Select the Si32171-C-GM1R for applications requiring DTMF detection and pulse metering capabilities alongside standard FXS functionality. Compare against other Si3217x-C models if wideband audio or different voltage ratings are needed. Verify compatibility with existing PCM or SPI host controllers before finalizing the component choice.

Telecom Part Context

The Si32171-C-GM1R belongs to the Si3217x-C family of ProSLIC products. These devices are pin-compatible single-channel solutions designed to implement foreign exchange station interfaces in compliance with LSSGR, ITU, and ETSI specifications. The C-series offers updated features compared to previous revisions while maintaining form factor compatibility.

Telecom Replacement Considerations

Direct substitutes within the Si3217x-C family include the Si32170-C-GM1R, Si32174-C-GM1R, and Si32176-C-GM1R. Selection depends on specific feature requirements such as DTMF detection availability or maximum battery voltage ratings.