SI2439-A-FM

Overview

The SI2439-A-FM is a system-side network controller and processor IC from the Skyworks ISOmodem family, designed for V.34 data communication over PSTN lines. It operates with a supply voltage range of 3.0 V to 3.6 V and draws a typical total supply current of 17 mA. The device supports data rates up to 33.6 kbps and utilizes SPI or UART interfaces for host connectivity. It functions within an ambient temperature range of 0°C to +70°C and is housed in a 38-pin QFN package measuring 5x7 mm.

Feature Summary

• Supports ITU-T V.34 protocol standards for full-duplex data transmission over public switched telephone networks.
• Integrates flexible clocking options including support for low-cost 32.768 kHz oscillators and 4.915 MHz crystals.
• Provides programmable telephone line interface capabilities through integration with the Si3018 line-side DAA device.

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 'FM' against the manufacturer's official documentation to confirm the tube packaging configuration. Ensure that the F-grade commercial temperature rating aligns with the operational environment requirements of the target application before finalizing procurement.

Selection Notes

Select this component when designing system-side modem solutions requiring V.34 compliance without external DSPs. Confirm compatibility with the paired Si3018 line-side device for global DAA functionality. Evaluate the 38-pin QFN thermal resistance characteristics to ensure adequate heat dissipation within the intended enclosure constraints.

Part Context

This part belongs to the Skyworks ISOmodem chipset family, specifically the Si2494/39 series. It serves as the system-side processing unit, complementing the Si3018 line-side device to form a complete modem solution. This architecture eliminates the need for separate codecs, transformers, and hybrid circuits typically required in traditional modem designs.

Replacement Considerations

Consult the manufacturer's datasheet for officially confirmed substitute part numbers. Verify pinout and electrical parameter compatibility if considering alternative SKUs within the same product family.