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SI4743-C10-GM
Si4740/41/42/43/44/45-C10 A U TOMOTIVE AM/FM R ADIO R ECEIVER Features Digital audio output (I2S) (Si4741/43/45 only) 24-pin 4 x 4 mm QFN package Pb-free/RoHS compliant Ordering Information: See page 39. Pin Assignments Si4740/41/42/43/44/45-C10-GM (Top View) GPO2/INT GPO3/DCLK GPO1/AGC2 AM and FM programmable channel bandwidth filters Digital FM stereo decoder Advanced patented RDS/RBDS processor (Si4741/43/45 only) Automatic gain control (AGC) Integrated AM and FM low-noise amplifier (LNA) Image-rejection mixer Frequency synthesizer with integrated voltage controlled oscillator (VCO) Low-IF conversion with no external ceramic filters 3.0 to 3.6 V supply voltage Programmable reference clock AECQ-100 qualified –40 to 85 ºC operation NC NC Worldwide FM band support (64–108 MHz) Worldwide AM band support (520–1710 kHz) LW band support (153–288 kHz) (Si4742/43/44/45 only) MW (520–1710 kHz) and SW (2.3–30 MHz) support (Si4742/43/44/45 only) NOAA weather band support (162.4–162.55 MHz) (Si4742/43 only) FM multipath detection and mitigation AM/FM noise blanker (Si4742/43/44/45 only) Received signal quality indicators (RSSI, SNR, frequency offset, multi-path interference) AM and FM programmable seek tuning AM and FM programmable soft mute control FM Hi-cut control (Si4742/43/44/45 only) Power line noise rejection/AM lo-cut filter FM programmable stereo-mono blend NC 24 23 22 21 20 19 FMI 1 18 DFS RFGND 2 17 DOUT AGC1 3 Applications NC 4 OEM car audio systems After-market car audio systems 16 LOUT GND PAD 15 ROUT GND 5 14 GND Functional Block Diagram RDS LNA WEAK SIGNAL CONDITION AGC ADC AMI LNA GND AGC 10 11 12 RCLK VIO Patents pending Si474x FMI 9 SDIO The Si474x AM/FM receiver family is the most highly integrated automotive grade and performance solution available. 8 SEN 13 VDD 7 SCLK Description RST AMI 6 DOUT DIGITAL AUDIO DFS DCLK DAC ROUT DAC Note: To ensure proper operation and receiver performance, follow the guidelines in “AN400: Si474x AM/FM Receiver Layout Guide.” Silicon Laboratories will evaluate schematics and layouts for qualified customers. LOUT DSP ADC AGC VDD AFC Rev. 1.0 9/09 QUALITY DETECTOR CNTRL GPO1-3 VIO RST RCLK GND LDO SEN SCLK SDIO 3.0–3.6 V Copyright © 2009 by Silicon Laboratories Si4740/41/42/43/44/45
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