SI32174-C-FM1R

Telecom Overview

The SI32174-C-FM1R 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 digital interfaces. This device features wideband voice support, DTMF detection, and an integrated tracking DC-DC controller. It provides a maximum battery voltage of -110 V and functions within a temperature range of 0 °C to 70 °C (F-grade). The component is housed in a 5x7 mm 42-pin QFN package.

Telecom Feature Summary

• Performs all BORSCHT functions for complete FXS telephony solutions
• Supports wideband audio processing and DTMF detection capabilities
• Includes an internal balanced or unbalanced ringing generator with low power consumption
• Features software-programmable parameters including impedance and loop feed thresholds

Telecom Applications

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

Telecom Procurement Notes

Verify the specific F-grade temperature rating and -110 V battery voltage configuration against system requirements. Confirm the 42-pin QFN footprint matches the PCB layout guidelines provided in the datasheet. Ensure the ordering suffix corresponds to the required reel packaging format.

Telecom Selection Notes

Select this model for applications requiring wideband voice quality and DTMF detection. Compare against Si32171-C and Si32176-C variants if different voltage ratings or feature sets are needed. Verify compatibility with the host processor's SPI or PCM interface timing constraints before finalizing the design.

Telecom Part Context

This component belongs to the Si3217x-C family of single-chip FXS solutions. It is designed to replace legacy discrete line interface circuits by integrating all necessary analog and digital functions into a compact package. The C-series offers enhanced programmability and lower power consumption compared to previous generations.

Telecom Replacement Considerations

Direct replacements include other Si3217x-C variants such as the SI32171-C-FM1R or SI32176-C-FM1R, provided the voltage rating and feature set match the application needs. Pin compatibility allows for potential board-level swaps within the same family.