SI32391-B-FM1

Telecom Overview

The SI32391-B-FM1 is a single-channel ProSLIC analog subscriber line interface concept (SLIC) integrated circuit manufactured by Skyworks Solutions Inc. Designed for telecommunications applications, this component operates within a supply voltage range of 3.15 V to 3.45 V and supports an operating temperature range from -40°C to +85°C. It is housed in a 48-lead QFN package suitable for surface mount technology. The device integrates essential functions for FXS lines, including CODEC capabilities, hybrid circuits, and line driving stages, facilitating direct connection to public switched telephone networks.

Telecom Feature Summary

• Integrates full analog subscriber line interface functionality with built-in CODEC processing
• Supports standard FXS telephony line signaling and loop start operations
• Features high integration to minimize external passive component requirements

Telecom Applications

• Analog telephone adapters and VoIP gateways
• Central office and remote terminal telephony equipment
• Business PBX systems and IP phone interfaces

Telecom Procurement Notes

Verify the complete part number including the suffix FM1 to ensure correct packaging and tape-and-reel configuration. Confirm RoHS compliance status and lead-free specifications against current manufacturer documentation before ordering. Check for any recent lifecycle notices or obsolescence warnings directly from Skyworks Solutions to avoid procurement delays.

Telecom Selection Notes

Select this component when designing single-channel analog telephony interfaces requiring integrated CODEC and line drive capabilities. Ensure the design accommodates the specified 3.15 V to 3.45 V supply voltage range and thermal constraints for the QFN-48 package. Verify that the application requires FXS functionality rather than FXO or digital-only interfaces.

Telecom Part Context

This part belongs to the SI32391 series of ProSLIC devices, which are widely used in modern telecommunications infrastructure. The SI32391 family provides a compact solution for replacing discrete analog front-end designs. The specific FM1 suffix typically denotes the reel packaging format for automated assembly processes.

Telecom Replacement Considerations

Direct replacements may include other variants within the SI32391 family with different packaging options. Cross-reference with SI32391-B-GM1R for alternative reel configurations. Verify pin-to-pin compatibility and electrical parameter alignment before substituting.