SI2401-FS

Overview

The SI2401-FS is a V.22bis ISOMODEM with an integrated global DAA, manufactured by Skyworks Solutions Inc. It supports data modem formats including 2400 bps (V.22bis), 1200 bps (V.22, V.23, Bell 212A), and 300 bps (V.21, Bell 103). The device features fast connect and V.23 reversing capabilities, SIA security protocol support, and caller ID detection and decoding. It includes a UART with flow control and AT command set support. The component operates on a 3.3 V power supply and utilizes lead-free, RoHS-compliant packages.

Feature Summary

• Integrated third-generation DAA providing over 5000 V capacitive isolation and parallel phone detect functionality.
• Supports globally-compliant line interface requirements to minimize external components.
• Includes call progress support and compatibility with SIA and other security protocols.

Applications

• Data communication systems requiring V.22bis standard compliance
• Equipment utilizing SIA security protocols
• Systems requiring caller ID detection and decoding

Procurement Notes

Verify the specific package variant and manufacturing date code against current Skyworks documentation before procurement. Confirm that the integrated DAA meets the isolation voltage requirements for your target application's safety standards. Ensure the 3.3 V power supply specifications align with the system design constraints.

Selection Notes

Select this component when a complete V.22bis solution with integrated isolation is required. The integrated DAA reduces bill of materials complexity compared to discrete solutions. Verify that the supported baud rates and protocol sets match the legacy or specific communication standards of the end equipment.

Part Context

The SI2401-FS belongs to the Skyworks ISOMODEM family, designed for reliable data transmission over telephone lines. It integrates the modem logic and the line interface circuitry into a single package. This integration simplifies board layout and improves reliability by reducing the number of external passive components needed for line interfacing.

Replacement Considerations

The SI2400 is listed as a similar part within the same product family. Verify pinout compatibility and feature parity with official datasheets before substitution. No other direct substitutes are confirmed in the provided public documentation.