Si4740/41/42/43/44/45-C10 AUTOMOTIVE AM/FM RADIO RECEIVER Features Worldwide FM band support AM and FM programmable (64108 MHz) channel bandwidth filters Worldwide AM band support Digital FM stereo decoder (5201710 kHz) Advanced patented RDS/RBDS LW band support (153288 kHz) processor (Si4741/43/45 only) (Si4742/43/44/45 only) Automatic gain control (AGC) MW (5201710 kHz) and Integrated AM and FM low-noise SW (2.330 MHz) support amplifier (LNA) (Si4742/43/44/45 only) Image-rejection mixer Ordering Information: NOAA weather band support Frequency synthesizer with See page 39. (162.4162.55 MHz) (Si4742/43 only) integrated voltage controlled FM multipath detection and mitigation oscillator (VCO) AM/FM noise blanker Low-IF conversion with no Pin Assignments (Si4742/43/44/45 only) external ceramic filters Received signal quality indicators (RSSI, 3.0 to 3.6 V supply voltage Si4740/41/42/43/44/45-C10-GM SNR, frequency offset, multi-path Programmable reference clock (Top View) interference) AECQ-100 qualified AM and FM programmable seek tuning 40 to 85 C operation AM and FM programmable soft mute 2 Digital audio output (I S) control (Si4741/43/45 only) FM Hi-cut control (Si4742/43/44/45 only) 24 23 22 21 20 19 24-pin 4x4mm QFN package Power line noise rejection/AM lo-cut filter 1 18 DFS FMI Pb-free/RoHS compliant FM programmable stereo-mono blend RFGND 2 17 DOUT AGC1 3 16 LOUT GND Applications PAD NC 4 15 ROUT GND 5 14 GND OEM car audio systems After-market car audio systems AMI 6 13 VDD 7 8 9 10 11 12 Description The Si474x AM/FM receiver family is the most highly integrated automotive grade and performance solution available. Functional Block Diagram Patents pending Note: To ensure proper operation and Si474x receiver performance, follow the RDS DOUT guidelines in AN400: Si474x FMI DIGITAL LNA WEAK DFS AM/FM Receiver Layout Guide. AUDIO SIGNAL DCLK Skyworks will evaluate CONDITION AGC schematics and layouts for qualified customers. ADC DAC ROUT AMI LNA DSP GND ADC DAC LOUT AGC AGC QUALITY GPO1-3 3.03.6 V VDD DETECTOR LDO AFC CNTRL VIO GND RST Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Rev. 1.0 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice December 29, 2021 RCLK SEN SCLK SDIO RST NC NC SEN SCLK NC SDIO GPO1/AGC2 RCLK GPO2/INT VIO GPO3/DCLKSi4740/41/42/43/44/45-C10 NOTES: 2 Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Rev. 1.0 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice December 29, 2021