SI2434-C-FT

Overview

The SI2434-C-FT 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 operating current of 17 mA. It features UART and SPI interface options for host communication. The component is available in a 24-pin TSSOP package and supports commercial temperature ranges.

Feature Summary

• Integrated direct access arrangement (DAA) technology providing global telephone line interface compliance
• Supports standard modem AT commands and firmware upgradeability via EEPROM interface
• Eliminates the need for separate DSP, modem controller, codec, transformer, and hybrid components
• Includes Type I and II caller ID decode capabilities and DTMF detection/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 'C' against official Skyworks documentation to confirm temperature grade and packaging details. Ensure compatibility with the Si3018/10 line-side device as part of the required chipset combination. Confirm lead times and availability directly with authorized distributors or the manufacturer.

Selection Notes

Select this model when V.34 protocol support at 33.6 kbps is sufficient, noting that V.90 speeds are exclusive to the Si2457 variant. Verify the requirement for the 24-pin TSSOP package over the 16-pin SOIC option. Ensure the host system can provide the necessary clock frequencies, such as 4.915 MHz or 32.768 kHz, for proper operation.

Part Context

This component belongs to the ISOmodem family, designed as a complete embedded modem solution. It functions as the system-side device in a chipset architecture paired with the Si3018 or Si3010 line-side device. This integration allows for compact designs with minimal external component counts compared to traditional modem implementations.

Replacement Considerations

The Si2434-D-FTR is a tape-and-reel alternative within the same series. The Si2457 offers higher speed capabilities but requires different protocol considerations. Verify pinout and software compatibility before substituting.