Si4844-B20 BROADCAST ANALOG TUNING DIGITAL DISPLAY AM/FM/SW RADIO RECEIVER Features Worldwide FM band support Bass/Treble support (64109 MHz) Minimal BOM components with no Worldwide AM band support manual alignment (5041750 kHz) Excellent real-world performance SW band support China TV channels audio carrier (2.328.5 MHz) reception in FM band Selectable support for all AM/FM EN55020 compliant regional bands Two AAA batteries with 2.0 to 3.6 V Enhance FM/SW band coverage supply voltage Ordering Information: 2-wire control interface Wide range of ferrite loop sticks and See page 21. Mono/Stereo and valid station air loop antenna support indicator 24-pin SSOP package Digital volume support RoHS compliant Pin Assignments Applications Si4844-B20 (SSOP) Table and portable radios Modules for consumer electronics Stereos Entertainment systems 1 24 LNA EN LOUT Mini/micro systems Toys, lamps, and any application 2 23 ROUT IRQ needing an AM/FM/SW radio Boom boxes 3 22 TUNE1 DBYP Mini HiFi Clock radios 4 21 VDD2 TUNE2 iPhone docking 5 20 BAND VDD1 6 19 XTALI NC Description 7 18 NC XTALO 8 17 FMI SCLK The Si4844-B is the analog-tuned digital-display digital CMOS AM/FM/SW radio 9 16 RFGND SDIO receiver IC that integrates the complete receiver function from antenna input to audio 10 15 RST NC 2 output. Working with the host MCU (I C-compatible 2-wire control interface), 11 14 NC GND frequencies and stereo/mono information can be displayed on LCD while the analog- 12 13 GND AMI tune features are kept. Si4844-B is pin-to-pin compatible with the current Si484x-A tuner. Sharing all the advanced features of the Si484x-A, Si4844-B can support a wider range of FM and SW bands. The Si4844-B also supports China TV channels audio This product, its features, and/or its reception in FM band. The superior control algorithm integrated in the Si4844-B architecture is covered by one or more of provides a easy and reliable control interface while eliminating all the manual-tuned the following patents, as well as other external components used in a traditional solution. patents, pending and issued, both foreign and domestic: 7,127,217 Functional Block Diagram 7,272,373 7,272,375 7,321,324 7,355,476 7,426,376 7,471,940 Si4844-B Si4830/34 7,339,503 7,339,504. ADC DAC AMI LOUT AM LNA DSP RFGND ANT ADC DAC ROUT FM AGC ANT FMI 0/90 TUNE1/2 ADC AFC XTALI CONTROL INTERFACE BAND 2.0~3.6V VDD1/2 XTAL REG OSC 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 2, 2021 IRQ SCLK SDIO RSTSi4844-B20 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 2, 2021