Si4737-B20

Si4736/37/38/39-B20 BROADCAST WEATHER BAND RADIO RECEIVER NC3d6e/d3f7o/r38N/e3w9-DCe4s0igns GPO1 GPO2/INT GPO3/DCLK Features  NOAA weather band support (162.4–  No manual alignment necessary 162.55 MHz)  Programmable reference clock  Worldwide FM band support  Volume control (76–108 MHz)  Programmable soft mute control  Worldwide AM band support  Programmable de-emphasis (520–1710 kHz) (Si4736/37 only)  RDS/RBDS processor (Si4737/39  1050 Hz alert tone detection only)  Excellent real-world performance  Optional digital audio output (Si47/39  Freq synthesizer with integrated VCO only)  Advanced AM/FM seek tuning  Optional digital audio output  Automatic frequency control (AFC) (Si4737/39 only)  Automatic gain control (AGC)  2-wire and 3-wire control interface  Integrated LDO regulator  2.7 to 5.5 V supply voltage  Digital FM stereo decoder  Firmware upgradeable  Adaptive noise suppression  3 x 3 x 0.55 mm 20-pin QFN package  AM/FM/WB digital tuning  Pb-free/RoHS compliant Ordering Information: See page 30. Pin Assignments Si4736/37/38/39-GM (Top View) Applications  Emergency radios  Table and portable radios  Stereos  Mini/micro systems  Portable media players  Boom boxes  Cellular handsets  Modules  Clock radios  Mini HiFi Description The Si4736/37/38/39 is the first digital CMOS AM/FM/WB radio receiver IC that integrates the complete tuner function from antenna input to audio output. NC 1 FMI 2 RFGND 3...