SI2434-C-FS

Overview

The SI2434-C-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 protocols over the Public Switched Telephone Network (PSTN). The device operates on a digital supply voltage ranging from 3.0 V to 3.6 V with a typical current consumption of 17 mA. It utilizes a 4.915 MHz clock frequency and provides UART or SPI interface connectivity. The component is housed in a 16-pin SOIC package and functions within a commercial temperature range of 0°C to +70°C.

Feature Summary

• Integrated direct access arrangement (DAA) technology providing global telephone line interface compliance
• Supports standard modem AT commands and firmware upgrades via EEPROM interface
• Includes Type I and II caller ID decode capabilities without external memory requirements
• Offers flexible clocking options including low-cost oscillators and external clock inputs

Applications

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

Procurement Notes

Verify the specific grade suffix for the SI2434-C-FS against official Skyworks documentation, as datasheets typically list F-grade and G-grade variants. Confirm that the C-suffix corresponds to the intended operating temperature range and performance specifications before procurement. Ensure compatibility with the required Si3018/10 line-side device for complete chipset functionality.

Selection Notes

Select this model when V.34 protocol support at 33.6 kbps is sufficient for the application. Compare against the SI2457 if higher speeds up to 56 kbps are required. Verify that the 16-pin SOIC package meets the PCB layout constraints. Ensure the host system can provide the necessary UART or SPI interface signals and compatible power supply rails.

Part Context

This component belongs to the ISOmodem family of products designed for embedded modem applications. It is part of a chipset solution that pairs with the Si3018 or Si3010 line-side devices. The family eliminates the need for separate DSPs, codecs, and transformers, offering a compact footprint with minimal external components.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.