SI2400-KS

Overview

The Si2400 is a V.22bis ISOmodem with an integrated global Direct Access Arrangement (DAA). It operates on a 3.0 to 5.25 V digital supply and supports data rates up to 2400 bps using V.22bis, V.22, V.23, Bell 103, and Bell 212A standards. The device features a UART interface with programmable baud rates including 300, 1200, 2400, 9600, 19200, 230400, 245760, and 307200 Hz. It includes caller ID detection, DTMF generation/detection, and voice codec capabilities. Operating temperatures range from -40°C to 85°C for the B-Grade variant.

Feature Summary

• Integrated capacitive isolation technology eliminates the need for external isolation transformers or opto-isolators.
• Programmable line interface meets global telephone line requirements including FCC, CTR21, and JATE specifications.
• Supports hardware HDLC framing for V.42 error correction and fast connect protocols.

Applications

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

Procurement Notes

Verify the specific grade suffix (K or B) required for your target ambient temperature range before ordering. Confirm that the 16-pin SOIC package dimensions match your PCB footprint design. Ensure the host microcontroller UART timing aligns with the specified start bit and CTS active constraints.

Selection Notes

Select the Si2400 when a complete modem solution with integrated DAA is needed to minimize board space. Choose this component if global regulatory compliance for telephone interfaces is a primary requirement. Consider this part for applications requiring embedded modem functionality without separate DSP or analog front-end components.

Part Context

The Si2400 belongs to the Silicon Laboratories ISOmodem family of complete modem chipsets. It is designed as a drop-in replacement for traditional multi-component modem designs. The device integrates the DSP data pump, modem controller, analog front end, and audio codec into a single system.

Replacement Considerations

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