SI2493-D-GTR

Overview

The SI2493-D-GTR is a system-side ISOmodem device from Skyworks Solutions, packaged in a 24-pin TSSOP. It operates with a digital supply voltage (VD) ranging from 3.0 V to 3.6 V and supports an operating temperature range of -40 °C to +85 °C for the G-grade variant. The component provides data rates up to 56 kbps downstream and 48 kbps upstream over PSTN lines. It features integrated Direct Access Arrangement (DAA) technology, eliminating the need for external transformers or opto-isolators. Communication interfaces include UART, SPI, and parallel modes.

Feature Summary

• Supports ITU-T V.92 compliant data formats including V.92 PCM upstream and Quick Connect capabilities.
• Integrates programmable telephone line interface with global DAA compliance and capacitive isolation.
• Provides flexible clocking options utilizing low-cost oscillators or external clock inputs.
• Includes Type I and II caller ID decode functionality 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. Confirm compatibility with the Si3018 line-side device as the datasheet validity depends on listed chipset combinations. Ensure environmental compliance requirements such as RoHS are met for the intended deployment region.

Selection Notes

Select the 24-pin TSSOP version when parallel interface, EEPROM access, or voice codec connectivity is required. The 16-pin SOIC option is suitable for footprint-compatible designs where these specific interfaces are unnecessary. Verify clock source configuration against application timing constraints before finalizing the bill of materials.

Part Context

This component belongs to the ISOmodem family designed for embedded modem applications. It functions as the system-side processor within a two-device chipset architecture alongside the Si3018 line-side device. The design emphasizes minimal external component count and small physical footprint for integration into compact electronic devices.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Design changes should be validated against the typical application schematic and layout guidelines specified in Application Note AN93.

FAQ

Does the 24-pin version support parallel interface communication?

Yes, the 24-pin TSSOP version supports UART, SPI, and parallel host interfaces, whereas the 16-pin version does not support the parallel interface.

What is the maximum downstream data rate supported by this device?

The device supports conventional data formats with connect rates of up to 56,000 bps (56 kbps) downstream over the Public Switched Telephone Network.

Is an external crystal required for operation?

The device supports flexible clock options, including a low-cost 32.768 kHz oscillator, a 4.915 MHz oscillator, or a 27 MHz clock input, allowing for various implementation choices.