Si4840/44-A10 BROADCAST ANALOG TUNING DIGITAL DISPLAY AM/FM/SW RADIO RECEIVER Features Worldwide FM band support Minimal BOM components with no (64109 MHz) manual alignment Worldwide AM band support Excellent real-world performance (5041750 kHz) Automatic frequency control (AFC) SW band support (Si4844 only) EN55020 compliant (2.328.5 MHz) Two AAA batteries with 2.0 to 3.6 V Selectable support for all AM/FM supply voltage (T = 25 C) regional bands Wide range of ferrite loop sticks and 2-wire control interface air loop antenna support Ordering Information: Mono/Stereo and valid station 24-pin SSOP package See page 20. indicator RoHS compliant Digital volume support Bass/Treble support Pin Assignments Applications Si4840/44-A10 (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 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 Si4840/44 is the first analog-tuned digital-display digital CMOS AM/FM/SW 9 16 RFGND SDIO radio receiver IC that integrates the complete receiver function from antenna input 10 15 RST NC 2 to audio output. Working with 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 12 13 GND AMI analog-tune features are kept. Leveraging Skyworks proven and patented digital low intermediate frequency (low-IF) receiver architecture, the Si4840/44 deliver superior RF performance and interference rejection. The superior control This product, its features, and/or its algorithm integrated in Si4840/44 provides easy and reliable control interface architecture is covered by one or more of while eliminating all the manual tuned external components used in traditional the following patents, as well as other solution. patents, pending and issued, both foreign and domestic: 7,127,217 7,272,373 7,272,375 7,321,324 Functional Block Diagram 7,355,476 7,426,376 7,471,940 7,339,503 7,339,504. Si484x Si4830/34 ADC DAC AMI LOUT AM LNA DSP RFGND ANT ADC DAC ROUT FM AGC ANT FMI 0/90 TUNE1/2 ADC XTALI AFC BAND CONTROL INTERFACE 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 September 28, 2021 IRQ SCLK SDIO RSTSi4840/44-A10 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 September 28, 2021