SI2404-C-GTR

Overview

The Skyworks SI2404-C-GTR is a system-side ISOmodem network controller processor IC 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 56 kbps when paired with the Si2457 line-side device, or lower speeds such as 33.6 kbps and 14.4 kbps depending on the chipset combination. The component utilizes UART, SPI, or parallel host interfaces and accepts clock inputs of 32.768 kHz, 4.9152 MHz, or 27 MHz. It integrates a Direct Access Arrangement (DAA) providing over 6000 V capacitive isolation and supports ITU-T and Bell protocols including V.90, V.34, V.32bis, and V.22bis.

Feature Summary

• Integrated Direct Access Arrangement (DAA) technology eliminates the need for external transformers, relays, opto-isolators, and hybrid circuits.
• Supports flexible clocking options including low-cost oscillators and direct 27 MHz clock input.
• Provides global telephone line interface compliance with parallel phone detection and overcurrent protection.
• Firmware upgradeable via EEPROM interface with support for SMS/MMS and DTMF generation.

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 official datasheet table to confirm pinout compatibility and temperature grade. The 'G' suffix typically indicates industrial temperature range operation, while 'C' may denote specific packaging or revision details. Confirm RoHS compliance status and moisture sensitivity level requirements prior to procurement to ensure adherence to assembly standards.

Selection Notes

Select this component based on the required maximum data rate and supported protocol suite. The SI2404 must be paired with a compatible line-side device, such as the Si3018, to form a complete modem solution. Ensure the host interface (UART, SPI, or Parallel) matches the target microcontroller capabilities and verify that the power supply constraints align with the 3.0 V to 3.6 V operating range.

Part Context

This part belongs to the Skyworks ISOmodem family, which includes the Si2457, Si2434, and Si2415 system-side devices. These components share similar architectural features but differ in supported data rates and protocol implementations. The SI2404 represents the entry-level option within this series, offering essential modem functionalities for cost-sensitive embedded designs requiring reliable PSTN connectivity.

Replacement Considerations

Direct replacements include other members of the ISOmodem family such as the SI2415, SI2434, or SI2457, provided the application does not require the higher data rates exclusive to those models. Verify pin-to-pin compatibility between the 16-pin SOIC and 24-pin TSSOP package options if substituting across different package variants within the same family.