SI32171-C-FM1

Telecom Overview

The Skyworks SI32171-C-FM1 is a single-channel ProSLIC FXS interface IC operating from a 3.3 V supply with 1.8 V or 3.3 V I/O options. It integrates a tracking DC-DC controller and supports PCM/SPI digital interfaces. The device provides a maximum battery voltage of –110 V, suitable for short to medium loops. Recommended operating conditions include an ambient temperature range of 0 °C to +70 °C (F-grade) and a silicon junction temperature limit of 145 °C. Supply currents vary by state, ranging from approximately 6.3 mA in reset to 44.6 mA during active off-hook operation.

Telecom Feature Summary

• Performs all BORSCHT functions for complete FXS telephony solutions
• Integrated tracking DC-DC controller with direct connection to MOSFET
• Supports DTMF detection and pulse metering capabilities
• Software-programmable parameters including ringing frequency and impedance

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 ordering suffix against the manufacturer's official documentation to confirm package type, temperature grade, and voltage rating. Ensure compatibility with required regulatory standards such as RoHS compliance before finalizing procurement specifications.

Telecom Selection Notes

Select this component for applications requiring a single-channel FXS solution with integrated power management. Confirm that the –110 V battery voltage rating meets the loop requirements. Verify support for DTMF detection if tone recognition is necessary for the target application design.

Telecom Part Context

This part 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 accordance with LSSGR, ITU, and ETSI specifications. They utilize a 42-pin QFN package.

Telecom Replacement Considerations

Consult the manufacturer's ordering guide for pin-compatible alternatives within the Si3217x-C series. Verify functional equivalence regarding voltage ratings and feature sets such as wideband audio or specific detection capabilities before substitution.