SI2404-D-FSR

Overview

The Skyworks SI2404-D-FSR is a system-side component of the ISOmodem family, designed for embedded modem applications. It operates with a digital supply voltage (VD) ranging from 3.0 V to 3.6 V and supports data rates up to 33.6 kbps using ITU-T V.34 and Bell 212A protocols. The device features UART, SPI, or parallel host interfaces and integrates a Direct Access Arrangement (DAA) providing over 6000 V capacitive isolation. It is available in a 16-pin SOIC package and supports commercial temperature ranges.

Feature Summary

• Integrated Direct Access Arrangement (DAA) eliminates external transformers and opto-isolators
• Supports multiple host communication modes including UART, SPI, and parallel interfaces
• Capable of automatic rate negotiation and fast connect capabilities
• Firmware upgradeable via EEPROM interface

Applications

• Set-top boxes
• Point-of-sale terminals
• Text and video telephones
• Digital video recorders
• Remote monitoring systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature grade. Ensure compatibility with the required line-side DAA chipset, such as the Si3010 or Si3018, for complete functionality. Confirm that the selected variant meets the necessary regulatory compliance standards for the target market.

Selection Notes

Select this model when a compact solution with integrated DAA is required for PSTN connectivity. The 16-pin option is suitable for space-constrained designs. Verify protocol support requirements; this model supports up to V.34 speeds, whereas higher speeds require different variants within the family. Ensure the host system can accommodate the supported interface options.

Part Context

This component belongs to the ISOmodem family, which combines a system-side modem controller with a line-side DAA. The SI2404 specifically targets applications requiring reliable voice and data transmission over standard telephone lines without the complexity of discrete analog components.

Replacement Considerations

Public confirmed substitute part numbers: None identified.