SI32391-B-FM1R

Telecom Overview

The SI32391-B-FM1R is a ProSLIC analog subscriber line interface concept (SLIC) integrated circuit manufactured by Skyworks Solutions. It provides a single channel for telephone interface applications, supporting FXS operation. The device operates within a supply voltage range of 3.15 V to 3.45 V and functions across an industrial temperature range from -40°C to +85°C. It is housed in a QFN-48 surface-mount package designed for compact PCB integration.

Telecom Feature Summary

• Integrates full subscriber line interface functionality including CODEC capabilities
• Supports standard analog telephone interface protocols
• Designed for robust performance in telecommunications equipment

Telecom Applications

• Analog telephone handsets
• VoIP gateways with analog ports
• Business PBX systems
• Telecom base stations

Telecom Procurement Notes

Verify the specific suffix FM1R against official Skyworks documentation to confirm package type and tape-and-reel configuration. Ensure compatibility with existing board layouts requiring QFN-48 footprints. Cross-reference RoHS compliance status with current manufacturer declarations before finalizing procurement orders.

Telecom Selection Notes

Select this component when designing single-channel analog telephony interfaces requiring integrated SLIC and CODEC functions. Compare power consumption and pinout requirements against alternative ProSLIC models like the SI3217x series. Confirm that the QFN-48 package dimensions fit the mechanical constraints of the target enclosure design.

Telecom Part Context

This part belongs to the ProSLIC family of subscriber line interface concepts. These ICs are widely used in modern telecommunications to replace discrete analog front-end components. The SI32391 variant specifically targets cost-sensitive and space-constrained analog phone applications.

Telecom Replacement Considerations

Direct replacements may include other SKUs within the SI32391 family with different suffixes indicating package or reel variations. Verify electrical pinouts and software compatibility if substituting with older generations like the SI32178 series.