SI32171-B-FM1

Telecom Overview

The SI32171-B-FM1 is a single-channel ProSLIC integrated circuit designed for foreign exchange station (FXS) telephony applications. It operates from a 3.3 V supply with a voltage range of 3.13 V to 3.47 V and supports a maximum battery voltage of -110 V. The device functions within an ambient temperature range of 0 °C to 70 °C. Key electrical specifications include a DC differential output resistance between 160 Ω and 640 Ω, idle channel noise of 8 to 12 dBrnC, and PSRR of 55 dB. It features DTMF detection and pulse metering capabilities.

Telecom Feature Summary

• Performs all BORSCHT functions for complete line interface management
• Supports wideband voice transmission
• Includes integrated DTMF detection and pulse metering
• Features low power standby operation

Telecom Applications

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

Telecom Procurement Notes

Verify the specific ordering suffix FM against official Skyworks documentation to confirm the commercial temperature grade and feature set. Ensure compatibility with standard PCM or SPI digital interfaces during system integration. Confirm that the -110 V battery voltage rating aligns with the target network requirements.

Telecom Selection Notes

Select this component for FXS implementations requiring DTMF detection and pulse metering in commercial environments. Compare against the G-grade variant if extended temperature ranges are necessary. Verify loop resistance limits against the 2000 Ω maximum specification to ensure proper line feeding performance.

Telecom Part Context

This part belongs to the Si3217x family of pin-compatible ProSLIC products. These devices implement FXS solutions compliant with LSSGR, ITU, and ETSI specifications. The family includes variants supporting different voltage ratings and temperature grades, often paired with Si3291x FXO devices for isolation.

Telecom Replacement Considerations

Direct substitutes include other parts within the Si3217x series such as the SI32176-B-FM or SI32178-B-FM, provided their specific feature sets like wideband capability or FXO support match the design requirements.