SI2493-C-GT

Overview

The SI2493-C-GT is a system-side component of the ISOmodem chipset family, designed for ITU V.92-compliant embedded modem applications. It operates on a 3.0V to 3.6V digital supply voltage and supports data rates up to 56 kbps over the Public Switched Telephone Network (PSTN). The device integrates a DSP, modem controller, codec, and Direct Access Arrangement (DAA) technology, eliminating the need for external discrete components. It features UART, SPI, or parallel host interfaces and supports global line interface compliance with over 6000V capacitive isolation when paired with the Si3018 line-side device.

Feature Summary

• Integrates a complete hardware modem solution including DSP, controller, codec, and DAA within a single package.
• Supports full-duplex data transmission with connect rates up to 56,000 bps over PSTN lines.
• Provides programmable telephone line interface capabilities compliant with global standards.
• Offers flexible host connectivity via asynchronous serial, synchronous SPI, or parallel interfaces.

Applications

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

Procurement Notes

Verify component status as this specific part number may be discontinued. Confirm availability through authorized distributors and check for End-of-Life notifications from Skyworks Solutions Inc. Ensure that any replacement components maintain compatibility with the existing chipset architecture and firmware requirements.

Selection Notes

Select the SI2493-C-GT for applications requiring a compact, low-power embedded modem solution. This system-side device must be paired with the appropriate line-side DAA component, such as the Si3018, to establish a complete connection to the telephone network. Verify that the required host interface (UART, SPI, or parallel) aligns with the specific package pinout and design constraints.

Part Context

The SI2493-C-GT belongs to the ISOmodem family manufactured by Skyworks Solutions Inc., formerly Silicon Laboratories. It serves as the system-side processor in a two-chip modem architecture. The 'C' suffix typically denotes commercial temperature range specifications, while 'GT' indicates the 24-pin TSSOP packaging option which supports additional interfaces like parallel communication and EEPROM access compared to the 16-pin variant.

Replacement Considerations

SI2493-D-GTR

FAQ

What host interfaces are supported by the SI2493-C-GT?

The SI2493-C-GT supports asynchronous serial (UART), synchronous Serial Peripheral Interface (SPI), and an 8-bit parallel interface due to its 24-pin TSSOP packaging.

Does the SI2493-C-GT include a built-in DAA?

Yes, the SI2493 integrates a Direct Access Arrangement (DAA) using proprietary technology, which eliminates the need for external transformers, relays, or opto-isolators.

What is the maximum data rate supported by this modem?

The device provides conventional data formats with connect rates of up to 56,000 bps downstream and up to 48,000 bps upstream when operating in V.92 mode.