SI2401-FSR

Overview

The SI2401-FSR is a V.22bis ISOModem system-side network controller and processor IC manufactured by Skyworks Solutions Inc. It supports data rates of 300 bps, 1200 bps, and 2400 bps with integrated global DAA for line interface compliance. The device operates on a 3.3 V power supply with a maximum current consumption of 17 mA. It features SPI and UART interfaces and functions within an operating temperature range of 0°C to +70°C. The component is housed in a 16-SOIC package.

Feature Summary

• Integrated third-generation DAA providing over 5000 V capacitive isolation
• Supports V.22bis, V.22, V.23, Bell 212A, V.21, and Bell 103 modem formats
• Includes caller ID detection and decoding capabilities

Applications

• System-side ISOModem implementations
• Industrial communication equipment requiring galvanic isolation
• Legacy dial-up networking infrastructure

Procurement Notes

Verify the specific suffix 'FSR' against official Skyworks documentation to confirm tape-and-reel packaging versus tube variations. Confirm RoHS compliance status as indicated in current datasheets. Check for Not Recommended for New Design (NRND) status which may impact long-term availability. Ensure lead-free package specifications match assembly requirements.

Selection Notes

Select this component when a system-side modem requires integrated analog front-end isolation without external DAA components. Verify that the required baud rates align with V.22bis standards up to 2400 bps. Ensure the design accommodates the 16-SOIC footprint and 3.3 V logic levels. Consider lifecycle status before initiating new hardware designs.

Part Context

This part belongs to the SI24xx series of ISOModem controllers from Skyworks Solutions. It serves as a system-side counterpart to remote modems, handling protocol conversion and line driving. The family typically includes variants like SI2401 and SI2457, differing primarily in supported modulation standards such as V.90 or V.34.

Replacement Considerations

Publicly confirmed direct substitute part numbers are not available in the provided source material. Evaluate SI2401 variants or SI2457 series components only if functional compatibility with V.22bis protocols and pinouts is verified through official cross-reference documents.