SI2439-A-GM

Overview

The SI2439-A-GM is a system-side network controller and processor IC from the Skyworks ISOmodem family, designed for V.34 data communication over the public switched telephone network (PSTN). It operates with a supply voltage range of 3.0 V to 3.6 V and draws a typical current of 17 mA. The device supports data rates up to 33.6 kbps and utilizes a 4.92 MHz clock frequency. It features SPI and UART interface types and is housed in a 38-pin QFN package measuring 5 x 7 mm. The component is rated for commercial temperature operation between 0°C and +70°C.

Feature Summary

• Supports ITU-T V.34 compliant data transmission protocols for full-duplex communication over PSTN lines.
• Integrates direct access arrangement (DAA) technology to provide a programmable telephone line interface with global compliance.
• Offers flexible host connectivity through selectable UART, SPI, or parallel interface options.
• Includes firmware upgradeability and an EEPROM interface for configuration storage.

Applications

• Embedded modem applications requiring compact footprints
• Point-of-sale terminals
• Security systems
• Medical equipment
• Remote monitoring devices

Procurement Notes

Verify the specific ordering suffix 'GM' against the manufacturer's official documentation to confirm the package type and temperature grade. Ensure compatibility with the required Si3018 line-side device for complete chipset functionality. Confirm moisture sensitivity level handling procedures during assembly to prevent damage.

Selection Notes

Select this model for applications requiring V.34 protocol support rather than V.92/V.90 speeds. Verify that the commercial temperature range (0°C to +70°C) meets the environmental requirements of the target deployment. Ensure the host system can accommodate the 38-pin QFN package dimensions and pinout configuration.

Part Context

This component belongs to the Skyworks ISOmodem family, which combines system-side controllers with line-side devices like the Si3018. The SI2439 variant specifically targets V.34 standards, distinguishing it from higher-speed models such as the SI2494 which supports V.92. It eliminates the need for external DSPs, codecs, and transformers by integrating these functions on-chip.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult the manufacturer's latest datasheet for potential obsolescence notices or recommended upgrades within the ISOmodem portfolio.