SI2457-C-FT

Overview

The SI2457-C-FT is a system-side ISOmodem network controller and processor IC manufactured by Skyworks Solutions. It supports data rates up to 56 kbps using V.90 protocols and operates on a 3.3 V supply voltage with a typical current consumption of 17 mA. The device utilizes SPI or UART interfaces for host communication and functions within an ambient temperature range of 0°C to +70°C. It is housed in a 16-pin SOIC package designed for surface mount technology.

Feature Summary

• Integrated direct access arrangement (DAA) providing global telephone line interface compliance
• Supports ITU-T, Bell, and MNP protocol standards including V.90, V.34, and V.42bis
• Firmware upgradeable via EEPROM interface without external memory requirements
• Includes DTMF detection/generation and Type I/II caller ID decode capabilities

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 the manufacturer's official documentation to confirm grade and packaging specifications. Confirm that the component status remains active for new designs, as older revisions may carry different lifecycle designations. Ensure compatibility with the required Si3018 line-side device for complete chipset functionality.

Selection Notes

Select this model when a 16-pin SOIC footprint is required for embedded modem applications. Verify that the operating environment stays within the commercial temperature range of 0°C to +70°C. Ensure the host system can support the necessary SPI or UART interface timing parameters defined in the switching characteristics section of the datasheet.

Part Context

This component belongs to the ISOmodem family of products from Skyworks Solutions. It is designed to work in conjunction with the Si3018 line-side device to form a complete modem solution. The series eliminates the need for separate DSPs, codecs, and transformers, offering a compact alternative for telephone line integration.

Replacement Considerations

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