SI2400-BS

Overview

The Skyworks Solutions Inc. SI2400-BS is a V.22bis ISOmodem with an integrated global Direct Access Arrangement (DAA). It operates on a digital supply voltage (VD) ranging from 3.0 V to 5.25 V, supporting both 3.3 V and 5.0 V logic levels. The device supports data rates up to 2400 bps using V.22bis QAM modulation, alongside V.22, V.23, Bell 212A, V.21, and Bell 103 standards. It features a universal asynchronous serial interface (UART) with programmable baud rates including 300, 1200, 2400, 9600, 19200, 230400, 245760, and 307200 Hz. The B-Grade variant ensures operation across an ambient temperature range of -40 °C to +85 °C.

Feature Summary

• Integrates a DSP data pump, modem controller, analog front end, DAA, and audio codec into a single chipset solution.
• Provides a globally compliant line interface with programmable AC/DC termination, ringer impedance, and overcurrent detection.
• Supports caller ID detection for US, UK, and Japanese formats, along with DTMF tone generation and decoding capabilities.
• Features hardware-based HDLC framing for V.42 error correction and V.25-based fast connect protocols.

Applications

• Set Top Boxes
• Security Systems
• ATM Terminals
• Medical Monitoring

Procurement Notes

Verify the specific suffix 'BS' against the manufacturer's official ordering guide to confirm package type and grade. Confirm that the B-Grade temperature rating (-40 °C to +85 °C) aligns with your system requirements. Ensure the host microcontroller UART settings match the supported baud rates listed in the switching characteristics table.

Selection Notes

Select this component when a complete embedded modem solution with integrated isolation is required. It eliminates the need for separate DSPs, isolation transformers, and voice codecs. Verify compatibility with your target telephone network specifications, such as FCC or CTR21, by configuring the appropriate AC and DC termination registers.

Part Context

The SI2400 belongs to the ISOmodem family designed for embedded applications requiring small board space and low power consumption. It pairs with the Si3015 companion chip in typical implementations to handle specific line interface tasks while maintaining capacitive isolation between the digital control side and the analog phone line side.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.