The Si474x products are feature-rich solutions, providing excellent performance, using Silicon Labs' recommended settings, and extensive flexibility for customized audio performance. Programmable algorithms include advanced seek with multiple signal qualifiers and thresholds in all supported bands, FM stereo blend rates and thresholds, soft mute characteristics, multipath detection and mitigation, AM/FM noise blankers, and selectable FM Hi-cut filters. The part accepts programmable reference clock values. The IC provides audio output in standard line-level analog audio using high fidelity stereo DACs or digital audio format.
The Si4741, Si4743, Si4745, and all other family part numbers ending with an odd number, offer a fully-integrated preprocessor for the European Radio Data System (RDS) and the North American Radio Broadcast Data System (RBDS). The RDS preprocessor includes all symbol decoding, advanced error-correction, detailed visibility to block-error rates (BLER), synchronization status and times, and complete, decoded and error-corrected RDS group presentation. The Si474x RDS-enabled parts also offer several modes of operation to provide extensive visibility to the RDS status and group data.