Si4749 High-Performance FM RDS/RBDS Data Receiver/ Alternate Frequency Scanner data. The Si4749 is offered in a compact Description The Si4749 is a 100% CMOS receiver integrated 4 x 4 x 0.85 mm 24-pin Quad Flat No-Lead (QFN) circuit (IC), offering the full receive functionality from package. antenna to RDS/RBDS* data for use in the *Note: The term RDS will be used to mean automotive and personal navigation markets. It is an RDS/RDBS throughout this document. ideal companion RDS background data receiver for Features Traffic Message Channel (TMC) and Open Data - Worldwide FM band support (76108 MHz) Applications (ODA) applications frequently used in - Advanced patented RDS/RBDS Forward Error conjunction with GPS functionality or as an alternate Correction (FEC) engine frequency (AF) scanner in automotive radios. It offers - Highest RDS Decoder Reliability a fully-integrated advanced decoder for the - Robust synchronization at high BLER European RDS* and the North American RBDS. It - RDS reception with FM mono broadcast includes demodulation, symbol decoding, advanced - Fully configurable RDS data quality visibility and error correction, detailed visibility to block-error rates associated interrupts (BLER), and decoder reliability, synchronization - On-chip memory for up to 25 RDS groups status, and times. The Si4749 provides complete, decoded, and error-corrected RDS groups, up to 25 - Multi-path interference detection groups at a time with associated BLER. - Received signal quality indicators (RSSI, SNR, wideband AM) The Si4749 incorporates a high performance RDS - Automatic frequency control (AFC) decoder based on patented methodologies, and - Automatic gain control (AGC) delivers excellent RDS sensitivity performance, synchronization to RDS at high BLER levels, and - Image-rejection mixer RDS data decoding with superior decoder reliability. - Frequency synthesizer with integrated VCO The Si4749 draws on Skyworks broadcast audio and - Low-IF direct conversion no external ceramic fil- corresponding patent portfolio using a digital low ters intermediate frequency (low-IF) receiver architecture - 3.0 to 5.5 V supply voltage proven by hundreds of millions broadcast audio - Programmable reference clock receivers shipped worldwide. The low-IF architecture - AECQ-100 qualified allows the Si4749 to deliver superior performance - 40 to 85 C operation while integrating the great majority of external - 24-pin 4 x 4 mm QFN package components required by competing solutions. - Pb-free/RoHS compliant The Si4749 is feature-rich, providing both highly Application automated performance, according to Skyworks - OEM car audio systems recommended settings, or extensive programmability - After-market car audio systems and flexibility for customized system performance. - Telematics The part accepts programmable reference clock - Personal navigation system (PND) values. The Si4749 offers several modes of - GPS-enabled devices operation for various applications which provide more or less visibility to the RDS status and group Si4749 RSSI SNR MPTH ADC FMIN LNA Active Si4749 Digital Core RFGND splitter RDS ADC AGC 0/90 32.768 kHz GPIO2-3 (TYP) VIO RCLK AFC RST Control Interface SEN 3.0 5.5 V VDD SCLK LDO GND SDIO Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice September 13, 2021 Si4749 High-Performance FM RDS/RBDS Data Receiver/ Alternate Frequency Scanner Selected Electrical Specifications Parameter Test Conditions Min Typ Max Units Input Frequency 76 108 MHz Frequency Steps 10 200 kHz RDS Sensitivity f = 2 kHz, RDS BLER < 5% 8 V emf Input IP3 400 and 800 kHz blockers 105 dBV emf Image Rejection 55 dB Adjacent Channel Selectivity 200 kHz 50 dB Alternate Channel Selectivity 400 kHz 70 dB RCLK Frequency 31.13 32.768 40,000 kHz RCLK Tolerance -100 100 ppm Supply Voltage 3 5.5 V Interface Supply Voltage 1.5 3.6 V Supply Current 24 mA Ambient Temperature -40 85 C Seek/Tune Time RCLK tolerance = 100 ppm 40 60 ms/channel Powerup Time From powerdown 110 ms Pin Assignments Package Information 24 23 22 21 20 19 FMI 1 18 NC RFGND 2 17 NC NC 3 16 NC GND PAD CTUNE 4 15 NC GND 5 14 GND Symbol Millimeters Symbol Millimeters NC 6 13 VDD Min Nom Max Min Nom Max 7 8 9 10 11 12 A 0.80 0.85 0.90 E2 2.00 2.10 2.20 A1 0.00 0.02 0.05 L 0.30 0.40 0.50 b 0.18 0.25 0.30 L1 0.03 0.05 0.08 c 0.19 0.24 0.29 aaa 0.10 D 4.00 BSC bbb 0.10 D2 2.00 2.10 2.20 ccc 0.08 e 0.50 BSC ddd 0.10 f 0.27 BSC eee 0.10 E 4.00 BSC Notes: 1. All dimensions are shown in millimeters unless otherwise noted. 2. Dimensioning and tolerancing per ANSI Y14.5M-1994. 3. This drawing conforms to the JECEC Solid State Outline MO-220, Variation VGGD-8. 4. Recommended card reflow profile is per the JEDEC/IPC J-STD-020C specification for Small Body Components. 5. Lead-free/RoHS compliant. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice September 13, 2021 NC RST NC SEN SCLK NC SDIO GPO1 RCLK GPO2/INT VIO GPO3