SI2404-D-FTR

Overview

The SI2404-D-FTR is a system-side ISOmodem device from Skyworks Solutions, designed as part of the Si2457/34/15/04 chipset family. It operates with a digital supply voltage (VD) ranging from 3.0 V to 3.6 V and supports ambient temperatures from 0°C to 70°C for the F-grade variant. The component facilitates data modem formats including ITU-T and Bell standards, supporting speeds from 300 bps up to 33.6 kbps. It integrates UART, SPI, or parallel host interfaces and utilizes a global Direct Access Arrangement (DAA) technology for telephone line interfacing.

Feature Summary

• Supports ITU-T and Bell data modem protocols with automatic rate negotiation capabilities.
• Integrates a programmable Direct Access Arrangement (DAA) providing capacitive isolation for global compliance.
• Offers flexible clocking options including low-cost oscillators and external clock inputs.
• Compatible with AT command sets and supports firmware upgrades via an EEPROM interface.

Applications

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

Procurement Notes

Verify the specific ordering suffix against official Skyworks documentation to confirm package type and temperature grade. Confirm current availability status through authorized distributors, as lead times may vary based on production schedules. Ensure compatibility with the paired line-side device, such as the Si3018 or Si3010, for complete functionality.

Selection Notes

Select this model when designing embedded modem applications requiring a compact footprint and minimal external components. Verify that the required data rates do not exceed 33.6 kbps, as higher speeds are reserved for other members of the ISOmodem family. Ensure the design accommodates the necessary power supply decoupling and crystal oscillator specifications outlined in the typical application schematic.

Part Context

This component belongs to the ISOmodem family, which combines system-side and line-side devices to eliminate the need for separate DSPs, codecs, and transformers. The Si2404 specifically targets lower-speed applications compared to the Si2457, offering a cost-effective solution for standard PSTN connectivity while maintaining global regulatory compliance through integrated DAA technology.

Replacement Considerations

The Si2415-D-FTR is a documented alternative within the same datasheet family, supporting similar protocol speeds. Designers should verify pinout compatibility and ensure that the replacement meets the specific baud rate requirements of the target application before substitution.