SI2434-D-FS

Overview

The SI2434-D-FS is a system-side ISOmodem network controller and processor IC manufactured by Skyworks Solutions. It supports data rates up to 33.6 kbps using V.34 modulation protocols. The device operates on a digital supply voltage (VD) ranging from 3.0 V to 3.6 V, with a typical total supply current of 17 mA at nominal conditions. It features an integrated Direct Access Arrangement (DAA) providing over 6000 V capacitive isolation for global telephone line interfacing. The component utilizes UART, SPI, or parallel host interfaces and is available in a 24-pin TSSOP package.

Feature Summary

• Integrated DAA technology eliminates the need for external transformers, relays, opto-isolators, and hybrid circuits.
• Supports comprehensive modem protocol suites including ITU-T V.90, V.34, V.32bis, V.22bis, and Bell standards.
• Firmware upgradeable via EEPROM interface with support for AT command sets and SMS/MMS capabilities.

Applications

• Embedded modem applications requiring small footprint and minimal external components
• Set-top boxes and digital video recorders with telephony connectivity
• Point-of-sale terminals and remote monitoring systems

Procurement Notes

Verify the specific ordering suffix against official Skyworks documentation to confirm package type and temperature grade. Confirm chipset compatibility with the Si3018 line-side device as required for complete functionality. Check for any product change notices regarding manufacturing sites or material composition updates prior to finalizing procurement orders.

Selection Notes

Select this model when V.34 data speeds are sufficient for the application, as higher speeds require the Si2457 variant. Ensure the design accommodates the 24-pin TSSOP package dimensions and land pattern. Verify that the host processor supports the selected interface mode (UART, SPI, or parallel) and that the power supply meets the 3.0 V to 3.6 V operating range.

Part Context

This component belongs to the ISOmodem family, designed as a system-side solution paired with the Si3018 line-side device. The 'D' revision indicates a specific hardware version within the Si24xx series. The 'FS' suffix typically denotes the 24-pin TSSOP package option, distinguishing it from the 16-pin SOIC variant found in other SKUs like the Si2434-D-FT.

Replacement Considerations

The Si2434-D-FT serves as a pin-compatible alternative offering the same electrical specifications but in a 16-pin SOIC package. Designers must verify PCB layout changes if switching between the 24-pin TSSOP and 16-pin SOIC footprints. No functional differences exist between these package variants regarding modem performance.