SI2457-C-GT

Overview

The SI2457-C-GT is a system-side ISOmodem network controller processor IC manufactured by Skyworks Solutions. It supports data rates up to 56 kbps using V.90 protocols and operates with a 4.915 MHz clock frequency. The device utilizes SPI and UART interfaces for host communication and functions on a 3.3 V supply voltage, drawing approximately 17 mA of current. Designed for the G-grade commercial temperature range, it operates between -40°C and +85°C. The component is housed in a 16-pin SOIC surface-mount package.

Feature Summary

• Integrated direct access arrangement (DAA) technology providing global telephone line interface compliance
• Supports firmware upgrades via EEPROM interface and AT command set compatibility
• Includes Type I and II caller ID decode capabilities without external memory requirements
• Features DTMF detection and generation alongside SMS/MMS support

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 'GT' against the manufacturer's official documentation to confirm the exact grade and packaging configuration. Ensure the selected chipset combination matches the valid pairings listed in the datasheet's ordering guide section. Confirm that the G-grade temperature rating aligns with the target application environment before finalizing procurement.

Selection Notes

Select this model when a 16-pin SOIC footprint is required for embedded modem applications. Verify compatibility with the Si3018/10 line-side device to complete the chipset solution. Consider the integrated DAA feature to eliminate the need for separate transformers or opto-isolators. Ensure the host system supports the required SPI or UART interface protocols for proper integration.

Part Context

This component belongs to the ISOmodem family of products from Skyworks Solutions. It serves as the system-side processing unit within a two-chip modem architecture. The device integrates DSP, modem controller, codec, and analog output functions into a single compact package. It is designed to replace traditional discrete modem solutions by consolidating multiple components onto one chip.

Replacement Considerations

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