SI4735-C40-GU

RF Receivers Overview

The SI4735-C40-GU is a discontinued, highly integrated AM/FM/SW/LB radio receiver IC from Skyworks Solutions Inc. It supports worldwide frequency bands: LW (153kHz–279kHz), MW (520kHz–1.71MHz), SW (2.3MHz–26.1MHz), and FM (64MHz–108MHz). The device operates on a 2.7V to 5.5V supply with a receive current of 19.9mA. It features an I2C interface, RSSI output, and RDS/RBDS decoding. Packaged in a 24-pin SSOP, it is designed for surface-mount PCB assembly.

RF Receivers Feature Summary

• Integrated reception of AM, FM, Shortwave, and Longwave bands
• Built-in RDS/RBDS decoder for FM data services
• RSSI signal strength monitoring capability
• Low power consumption suitable for portable devices

RF Receivers Applications

• Portable AM/FM radios
• Weather band receivers
• Shortwave listening devices
• General purpose broadcast audio equipment

RF Receivers Procurement Notes

This component is officially obsolete and no longer manufactured by Skyworks Solutions Inc. Procurement must rely on remaining distributor stock or authorized secondary market channels. Verify part authenticity carefully due to end-of-life status. Ensure the specific C40 revision matches design requirements, as functional differences may exist between revisions.

RF Receivers Selection Notes

Select this part only if the 24-pin SSOP package and C40 silicon revision are strictly required for legacy designs. For new developments, consider active alternatives like the SI4735-D60 series which offer updated manufacturing support. Evaluate pin compatibility and software migration efforts when transitioning from this obsolete model to newer Skyworks receiver solutions.

RF Receivers Part Context

The SI4735 belongs to the Si47xx family of digital radio tuners. This specific C40 variant represents an earlier silicon revision compared to the currently supported D60 series. It shares architectural similarities with other family members but differs in package options and specific feature enablement codes defined by the manufacturer's product change notices.

RF Receivers Replacement Considerations

The SI4735-D60-GU is a direct substitute offering identical functionality in the same 24-SSOP package. The D60 revision provides active manufacturing support while maintaining electrical and pin compatibility.