Si4831/35-B30 BROADCAST MECHANICAL TUNING AM/FM/SW RADIO RECEIVER Features Worldwide FM band support Automatic frequency control (AFC) (64109 MHz) Integrated LDO regulator Worldwide AM band support 2.0 to 3.6 V supply voltage (5041750 kHz) Wide range of ferrite loop sticks and air SW band support (Si4835 only) loop antennas supported (5.622 MHz) 24-pin SSOP Excellent real-world performance RoHS-compliant EN55020-compliant Supports station and stereo LED No manual alignment necessary indicators Ordering Information: Flexible band selections Direct volume control See page 13. Bass and treble tone control Applications Pin Assignments Table and portable radios Modules Stereos Clock radios Si4831/35-B30 (SSOP) Mini/micro systems Mini HiFi CD/DVD players Entertainment systems 1 24 STEREO LOUT Boom boxes 2 23 STATION ROUT TUNE1 3 22 DBYP TUNE2 4 21 VDD2 Description 5 20 BAND VDD1 6 19 NC XTALI The Si4831/35-B30 is the 2nd generation mechanical-tuned digital CMOS NC 7 18 XTALO AM/FM/SW radio receiver IC that integrates the complete receiver function from FMI 8 17 VOL-/BASS antenna input to audio output. Like other successful audio products from RFGND 9 16 VOL+/TREBLE Skyworks, Si4831/35-B30 offers unmatched integration and PCB space savings 10 15 NC RST with minimum external components and a small board area. The Si4831/35-B30 11 14 NC GND requires a simple application circuit and removes any requirements for manually 12 13 AMI GND tuning components during the manufacturing process. The Si4831/35-B30 is a very simple product to design, manufacture, and support across multiple product lines. The receiver has very low power consumption, runs off two AAA batteries, and delivers the performance benefits of digital tuning to the analog radio market. This product, its features, and/or its architecture is covered by one or more of the following patents, as well as other Functional Block Diagram patents, pending and issued, both foreign and domestic: 7,127,217 Si4831/35 Si4830/34 7,272,373 7,272,375 7,321,324 ADC DAC LOUT 7,355,476 7,426,376 7,471,940 AMI AM LNA DSP 7,339,503 7,339,504. ANT RFGND ADC DAC ROUT FM/SW AGC ANT FMI 0/90 TUNE 1/2 ADC BAND AFC XTALI 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 VOL/TONE STATION STEREO RSTSi4831/35-B30 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