SI2493-D-FT

Overview

The Skyworks Solutions Inc. SI2493-D-FT is a system-side ISOmodem integrated circuit designed for embedded modem applications. It operates within a digital supply voltage range of 3.0 V to 3.6 V and supports an ambient temperature range of 0 °C to 70 °C. The device provides full-duplex data transmission over the Public Switched Telephone Network (PSTN) with connect rates up to 56,000 bps downstream and 48,000 bps upstream. It utilizes a 24-pin TSSOP package and interfaces via UART, SPI, or parallel protocols. The chipset includes ITU-T V.92 compliance, featuring PCM upstream capabilities and quick connect functions.

Feature Summary

• Complete ITU-T V.92 compliant modem solution with integrated Direct Access Arrangement (DAA)
• Supports multiple host interface options including UART, SPI, and parallel connections
• Capable of global telephone line interfacing with programmable loop characteristics
• Includes firmware upgradeability and support for SMS/MMS messaging

Applications

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

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm compatibility with the Si3018 line-side device as the datasheet validity depends on listed chipset combinations. Ensure design reviews are submitted prior to fabrication to adhere to layout guidelines specified in application notes.

Selection Notes

Select the 24-pin TSSOP option when parallel interface, EEPROM access, or voice codec connectivity is required. The 16-pin SOIC variant is suitable for footprint-compatible designs where these additional interfaces are unnecessary. Verify clocking requirements against available oscillator frequencies such as 32.768 kHz, 4.915 MHz, or 27 MHz inputs.

Part Context

The SI2493-D-FT belongs to the ISOmodem family from Skyworks Solutions Inc., functioning as the system-side component of a two-chip modem solution. It pairs with the Si3018 line-side device to provide a complete telecommunications interface. This integration eliminates the need for external DSPs, codecs, and transformers, significantly reducing the bill of materials and board space.

Replacement Considerations

The 16-pin SOIC version of the Si2493 serves as a footprint-compatible alternative for designs not requiring parallel or EEPROM interfaces.