Si4749 High-Performance FM RDS/RBDS Data Receiver/ Alternate Frequency Scanner provide more or less visibility to the RDS status and Description group data. The Si4749 is offered in a compact 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 automotive and personal navigation markets. It is an *Note: The term RDS will be used to mean RDS/ ideal companion RDS background data receiver for RDBS throughout this document. Traffic Message Channel (TMC) and Open Data Features Applications (ODA) applications frequently used in - Worldwide FM band support (76108 MHz) conjunction with GPS functionality or as an alternate - Advanced patented RDS/RBDS Forward Error frequency (AF) scanner in automotive radios. It offers Correction (FEC) engine a fully-integrated advanced decoder for the - Highest RDS Decoder Reliability European RDS* and the North American RBDS. It - Robust synchronization at high BLER includes demodulation, symbol decoding, advanced error correction, detailed visibility to block-error rates - RDS reception with FM mono broadcast (BLER), and decoder reliability, synchronization - Fully configurable RDS data quality visibility and status, and times. The Si4749 provides complete, associated interrupts decoded, and error-corrected RDS groups, up to 25 - On-chip memory for up to 25 RDS groups groups at a time with associated BLER. - Multi-path interference detection The Si4749 incorporates a high performance RDS - Received signal quality indicators (RSSI, SNR, decoder based on patented methodologies, and wideband AM) delivers excellent RDS sensitivity performance, - Automatic frequency control (AFC) synchronization to RDS at high BLER levels, and - Automatic gain control (AGC) RDS data decoding with superior decoder reliability. - Image-rejection mixer The Si4749 draws on Silicon Laboratories broadcast - Frequency synthesizer with integrated VCO audio and corresponding patent portfolio using a - Low-IF direct conversion no external ceramic digital low intermediate frequency (low-IF) receiver filters architecture proven by hundreds of millions - 3.0 to 5.5 V supply voltage broadcast audio receivers shipped worldwide. The - Programmable reference clock low-IF architecture allows the Si4749 to deliver - AECQ-100 qualified superior performance while integrating the great - 40 to 85 C operation majority of external components required by - 24-pin 4 x 4 mm QFN package competing solutions. - Pb-free/RoHS compliant The Si4749 is feature-rich, providing both highly automated performance, according to Silicon Application Laboratories recommended settings, or extensive - OEM car audio systems programmability and flexibility for customized system - After-market car audio systems performance. The part accepts programmable - Telematics reference clock values. The Si4749 offers several - Personal navigation system (PND) modes of operation for various applications which - GPS-enabled devices 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 FM Data Receiver Copyright 2008 by Silicon Laboratories 05.02.08Si4749 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 6 13 VDD NC 7 8 9 10 11 12 Symbol Millimeters Symbol Millimeters Min Nom Max Min Nom Max 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. FM Data Receiver Copyright 2008 by Silicon Laboratories 05.02.08 Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc. Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders NC RST NC SEN SCLK NC SDIO GPO1 RCLK GPO2/INT VIO GPO3