SI2494-A-FM

Overview

The SI2494-A-FM is a system-side network controller and processor IC from Skyworks Solutions, designed as part of the ISOmodem chipset family. It supports V.92 data protocols with a maximum data rate of 56 kbps over the public switched telephone network (PSTN). The device operates on a 3.3 V supply voltage with a typical current consumption of 17 mA. It features SPI and UART interface types for host communication. The component is housed in a QFN-38 package and is rated for commercial temperature operation ranging from 0°C to +70°C.

Feature Summary

• Supports ITU-T V.92 and V.34 compliant data modem formats with automatic rate negotiation
• Integrates direct access arrangement (DAA) technology for programmable telephone line interface
• Provides flexible clock options including low-cost oscillator support
• Compatible with Si3000 voice codec for full-duplex speakerphone and voice pass-through

Applications

• Point-of-sale terminals
• Security systems
• Medical equipment
• Remote monitoring devices

Procurement Notes

Verify the specific ordering suffix 'FM' against the manufacturer's official datasheet to confirm the exact temperature grade and packaging configuration. Ensure compatibility with the required Si3018 line-side device for complete chipset functionality. Confirm moisture sensitivity level handling requirements during assembly.

Selection Notes

Select this model for embedded applications requiring a compact footprint and minimal external components. Verify that the commercial temperature range meets the environmental requirements. Consider the integrated DAA feature to reduce bill of materials by eliminating separate transformers and opto-isolators.

Part Context

The SI2494-A-FM belongs to the SI2494/39 series of ISOmodem products. It functions as the system-side component of a two-chipset solution, pairing with the Si3018 line-side device. This combination provides a highly integrated modem solution that eliminates the need for separate DSPs, codecs, and hybrid circuits.

Replacement Considerations

The SI2494-A-GM is an industrial-grade alternative within the same series, offering an extended temperature range of -40°C to +85°C while maintaining identical electrical and functional specifications.