SI32170-C-GM1R

Telecom Overview

The SI32170-C-GM1R is a single-channel ProSLIC FXS interface IC from Skyworks Solutions. It operates on a 3.3 V supply with 1.8 V or 3.3 V I/O options and supports PCM, SPI, and GCI interfaces. The device integrates a dc-dc controller for battery voltages up to -140 V. Key features include DTMF detection, pulse metering, wideband voice support, and programmable parameters such as ringing frequency and DC current loop feed (10-45 mA). It complies with LSSGR, ITU, and ETSI standards.

Telecom Feature Summary

• Performs all BORSCHT functions for complete FXS telephony solutions
• Integrated tracking dc-dc controller with direct connection to MOSFET
• Supports PCM, SPI, and GCI digital interfaces with programmable interrupts
• Includes patented low power ringing and internal balanced/unbalanced ringing

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 or -140 V) required for your application against the ordering guide in the datasheet. Confirm the package type is 42-pin QFN/LGA. Check for RoHS compliance status if environmental regulations apply to your deployment. Ensure the supplier provides official Skyworks documentation for quality assurance.

Telecom Selection Notes

Select this model for applications requiring DTMF detection and pulse metering capabilities within a single channel. Compare with Si32171/4 variants if different voltage ratings are needed. Consider the Si3217x-Si3291x combination if FXO functionality is also required. Verify compatibility with your system's digital interface (PCM/SPI/GCI) and I/O voltage levels.

Telecom Part Context

The SI32170-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 (FXS) interfaces. They are part of Skyworks' portfolio aimed at simplifying analog telephony integration into digital systems while maintaining global regulatory compliance.

Telecom Replacement Considerations

Si32171-C-GM1R: Offers -110 V battery voltage rating instead of -140 V. Si32174-C-GM1R: Includes wideband voice support. Si32176-C-GM1R: Wideband voice support without DTMF detection. Si32177-C-GM1R: Wideband voice support without DTMF detection.