SI2493-D-GT

Overview

The SI2493-D-GT is a system-side ISOmodem device from Skyworks Solutions, packaged in a 24-pin TSSOP. It operates on a digital supply voltage (VD) ranging from 3.0 V to 3.6 V with a typical current consumption of 17 mA. The component supports data rates up to 56 kbps downstream and 48 kbps upstream over the PSTN. It accommodates flexible clocking options including a default 4.9152 MHz oscillator, 27 MHz input, or 32.768 kHz oscillator. The device provides UART, SPI, or parallel host interfaces and includes an integrated Direct Access Arrangement (DAA).

Feature Summary

• Supports ITU-T V.92 protocols including PCM upstream, Quick Connect, and Modem-on-Hold.
• Integrates a programmable telephone line interface utilizing patented Direct Access Arrangement technology.
• Provides multiple host communication options via UART, SPI, or parallel interfaces.
• 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 that the specific ordering suffix matches the required package type and temperature grade for the target application. Confirm compatibility with the paired Si3018 line-side device as specified in the official datasheet. Ensure all electrical parameters align with the recommended operating conditions defined by the manufacturer.

Selection Notes

Select this model when a 24-pin TSSOP footprint is required for the system-side modem controller. This variant supports additional features such as the parallel interface, EEPROM interface, and voice codec interface compared to the 16-pin option. Verify that the design can accommodate the necessary external components listed in the chipset bill of materials.

Part Context

This component belongs to the ISOmodem family designed for embedded applications. It functions as the system-side half of a complete modem chipset, requiring pairing with the Si3018 line-side device. The solution eliminates the need for separate DSPs, controllers, codecs, and transformers, offering a compact alternative to traditional modem designs.

Replacement Considerations

The SI2493-C-GT is a documented substitute within the same family but has been marked as Not Recommended for New Designs. Verify if the 16-pin SOIC version meets spatial constraints, noting it lacks support for parallel, EEPROM, and voice codec interfaces.