SI32178-B-FM1

Telecom Overview

The SI32178-B-FM1 is a single-channel ProSLIC integrated circuit implementing a complete foreign exchange station (FXS) telephony interface. It operates from a 3.3 V supply and supports PCM/SPI digital interfaces. The device performs all BORSCHT functions, including DTMF detection, pulse metering, and wideband voice support. It features an integrated DC-DC controller for battery voltage generation and supports a maximum battery voltage of -110 V. The component is housed in a 5x7 mm 42-pin QFN package and operates within an ambient temperature range of 0 to 70 °C.

Telecom Feature Summary

• Performs all BORSCHT functions with global programmability
• Integrates DTMF detection and pulse metering capabilities
• Supports wideband voice transmission
• Includes a tracking DC-DC controller for optimal battery voltage generation

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 FM1 against official Skyworks documentation to confirm pin compatibility and environmental grade. Confirm availability status as distribution channels may list obsolete or limited stock items. Ensure the procurement source provides valid RoHS compliance certificates matching the manufacturer's specifications.

Telecom Selection Notes

Select this component for applications requiring a single-channel FXS solution with integrated DTMF decoding and pulse metering. Verify that the system design accommodates the 42-pin QFN package dimensions. Ensure the host processor supports the required PCM or SPI interface protocols for configuration and data transfer.

Telecom Part Context

This part belongs to the Si3217x family of ProSLIC products, which are pin-compatible single-channel telephony interface solutions. The series implements LSSGR, ITU, and ETSI specifications for FXS applications. Other variants in the family offer different voltage ratings or temperature grades while maintaining functional compatibility.

Telecom Replacement Considerations

Direct replacement options include other parts within the Si3217x family, such as the SI32176-B-FM or SI32177-B-FM, provided they meet the specific voltage and temperature requirements of the application.