The Si4704/05 ICs support worldwide FM bands starting at 64 MHz for Eastern European countries and extending all the way to 108 MHz for the rest of the world. The devices support channel spacing down to 10 kHz, and include advanced, proven seek functionality. Silicon Labs' proven FM receiver expertise is incorporated in the Si4704/05 ICs, gained through thousands of designs with almost every OEM and ODM in the world and more than 100 million devices shipped.
The Si4704/05 ICs leverage Silicon Labs' internationally patented and proven digital low-IF architecture, offering proven functionality in a simple and mature API. The device is available in a highly-reliable, ultra-small 3 mm x 3 mm x 0.55 mm 20-pin QFN and are layout compatible with the full suite of Silicon Labs broadcast offerings including FM transmit, AM/FM/SW receive, weather band receive, SAME decode and unparalleled RDS data receivers. The complete solution including a minimal BOM requires less than 15 mm2 board area or less than half of competing solutions. The Si4705 ICs incorporates Silicon Labs' proven and widely adopted RDS processor including worldwide compliance, all symbol decoding, error detection, error correction and other RDS functions. The Si4705 RDS functionality is unmatched in the industry for performance, on-chip processing and worldwide adoption.