Product Matrix

Si4734/35

The Si4734/35 is the industry's first fully integrated, 100% CMOS AM/FM/SW/LW radio receiver IC. Offering unmatched integration and PCB space savings, the Si4734/35 requires minimal external components and less than 20 mm² of board area, excluding the antenna inputs.

Block Diagram

 

Features

Worldwide FM band support (64–108 MHz)
Worldwide AM band support (520–1710 kHz)
Shortwave band support (2.3–21.85 MHz)
Longwave band support (153–279 KHz)
Digital FM stereo decoder
AM/FM/SW/LW digital tuning

Applications

Table and portable radios
Stereos
Mini/micro systems
Portable media players
Boomboxes
Clock radios
Modules
Entertainment systems
Cellular handsets

Resources

Documentation
  
  
  
 View All Documents

Data Sheets, Application Notes and User Guides are available from your local sales rep.

Sales Reps

Distributors

Audio Documents

Superior Performance

"Our Zunes (with Si470x FM Rx) detected numerous static free stations. Each radio's digital data appeared on-screen, including artist and title."
- Walt Mossberg, Wall Street Journal

 



Product Matrix

Part NumberAvailable DocumentsPart DescriptionRDS SupportDig I/O 
Si4734Data Sheet
Data Sheet
Data Short
AM/FM/shortwave/longwave radio receiver
Si4735Data Sheet
Data Sheet
Data Short
AM/FM/shortwave/longwave radio receiverYesYes

 

The Si4734/35 AM/FM/SW/LW radio provides the space savings and low power consumption necessary for portable devices while delivering the high performance and design simplicity desired for all AM/FM/SW/LW solutions.

Leveraging Silicon Laboratories' proven and patented Si4700/01 FM tuner's digital low intermediate frequency (low-IF) receiver architecture, the Si4734/35 delivers superior RF performance and interference rejection in AM, FM, and shortwave and longwave bands. The high integration and complete system production test simplifies design-in, increases system quality and improves manufacturability.

The Si4734/35 is a feature-rich solution including advanced seek algorithms, soft mute, auto-calibrated digital tuning and FM stereo processing. In addition, the Si4734/35 provides analog or digital audio output and a programmable reference clock. The device supports I2C-compatible 2-wire control interface, SPI and a Si4700/01 backwards-compatible 3-wire control interface.

The Si4734/35 utilizes digital processing to achieve high fidelity, optimal performance and design flexibility. The chip provides excellent pilot rejection, selectivity and unmatched audio performance and offers both the manufacturer and the end-user extensive programmability and flexibility in the listening experience.

The Si4735 incorporates a digital processor for the European Radio Data System (RDS) and the North American Radio Broadcast Data System (RBDS), including all required symbol decoding, block synchronization, error detection, and error correction functions. Using RDS, the Si4735 enables broadcast data such as station identification and song name to be displayed to the user.