SI2404-D-GT

Overview

The SI2404-D-GT is a system-side component of the ISOmodem family, functioning as a data modem chipset designed for embedded applications. It supports data rates from 56 kbps down to 2400 bps and operates with a digital supply voltage (VD) ranging from 3.0 V to 3.6 V. The device accommodates ITU-T and Bell protocol formats, including V.90, V.34, V.32bis, V.22bis, V.21, Bell 103, and Bell 212A. It features UART, SPI, or parallel host interfaces and integrates a Direct Access Arrangement (DAA) providing over 6000 V capacitive isolation. Available in 16-pin SOIC or 24-pin TSSOP packages, it supports commercial (0°C to 70°C) and industrial (-40°C to 85°C) temperature ranges.

Feature Summary

• Integrated Direct Access Arrangement (DAA) eliminates the need for external transformers, relays, opto-isolators, and hybrid circuits.
• Supports global telephone line interface compliance with programmable loop characteristics and parallel phone detection.
• Firmware upgradeable via EEPROM interface with support for SMS/MMS and DTMF detection/generation.
• Flexible clocking options allow operation with low-cost 32.768 kHz oscillators, 4.915 MHz crystals, or 27 MHz inputs.

Applications

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

Procurement Notes

Verify that the specific ordering suffix matches the required package type, as the datasheet distinguishes between 16-pin SOIC and 24-pin TSSOP options. Confirm the grade designation corresponds to the necessary operating temperature range for the target environment. Ensure compatibility with the paired Si3018/10 line-side device, as the datasheet validity depends on specific chipset combinations listed in the ordering guide.

Selection Notes

Select the SI2404-D-GT when designing compact embedded modems requiring minimal external components. This system-side device pairs with the Si3018/10 line-side device to form a complete solution. Choose the 24-pin TSSOP option if additional codec or EEPROM interface pins are required, whereas the 16-pin SOIC offers a smaller footprint. Verify that the host processor supports the desired interface mode, whether UART, SPI, or parallel.

Part Context

The SI2404-D-GT belongs to the Skyworks ISOmodem family, which includes the Si2457, Si2434, and Si2415 variants. These devices share similar architectures but differ in supported maximum data rates and protocol capabilities. The SI2404 specifically serves as the system-side controller in this chipset family, handling data processing and AT command interpretation while relying on the line-side device for analog signal conditioning.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult the official Skyworks Solutions ordering guide for valid chipset combinations and potential obsolescence notices regarding the ISOmodem family.