SI2438-A-FT

Overview

The SI2438-A-FT is a system-side ISOModem network controller and processor IC manufactured by Skyworks Solutions Inc. It supports V.34 data protocols with a maximum data rate of 56 kb/s. The device operates on a single 3.3 V supply voltage, drawing 17 mA during operation. It features SPI and UART interface types for communication. The component is housed in a 24-TSSOP package with dimensions of 0.173 inches (4.40 mm) width. It functions within an operating temperature range from 0°C to +70°C and has a moisture sensitivity level of MSL 3.

Feature Summary

• Supports V.34 data protocol standards for modem applications
• Integrates system-side processing capabilities for fax and data transmission
• Provides flexible connectivity through SPI and UART interfaces

Applications

• System-side ISOModem implementations
• Fax system controllers
• V.34 data communication devices

Procurement Notes

Verify the specific suffix FT against official Skyworks documentation to confirm package type and tape-and-reel configuration. Confirm RoHS compliance status via the manufacturer's current datasheet. Check for obsolescence notices as the part may be restricted for new designs. Ensure the supplier provides valid traceability documents matching the Skyworks manufacturing origin.

Selection Notes

Select this component when a system-side V.34 modem solution is required with a 24-TSSOP footprint. Verify that the host system supports the necessary SPI or UART signaling levels. Ensure the design accommodates the 3.3 V power supply requirement and the specified thermal operating range. Compare pinout compatibility if replacing legacy modem controllers.

Part Context

The SI2438 belongs to the ISOmodem series from Skyworks Solutions, designed for integrated voice and data communication systems. This specific model targets system-side applications rather than user-end modems. It complements other Skyworks networking ICs by providing dedicated protocol handling for V.34 standards in compact surface-mount packages.

Replacement Considerations

Skyworks recommends the SI2435-F-FT as a manufacturer-approved alternative. Verify functional equivalence and pin compatibility before substitution. Other family members like the SI2439 offer different feature sets and should be evaluated based on specific protocol requirements.