Silicon Laboratories Inc. introduced a multi-band radio receiver IC that aims to modernize wheel-tuned radio products with digital displays. Based on a patented low-IF digital architecture, the Si484x receivers are manufactured in CMOS, providing the opportunity for high integration. Silicon Laboratories reports that its new receivers shrink bill-of-materials (BOM) and PCB area requirements in applications such as tabletop and portable radios, stereos, mini/micro systems, boom boxes, clock radios, docking stations, radio toys or any consumer electronics product containing a digital-display radio tuned by a mechanical wheel.
Alternative solutions use frequency counter ICs to approximate the tuned frequency of traditional analog ICs. With this approach, the actual tuned frequency could be significantly different from the displayed frequency, leading to a frustrating tuning experience for radio users. The Si484x family aims to address these challenges by providing precise mechanical tuning that enables radio users to hear the exact channel that is being displayed.
Pricing and Availability
- Worldwide FM band support (64–109 MHz)
- Worldwide AM band support (504–1750 kHz)
- SW band support (2.3–28.5 MHz) (Si4844 only)
- Selectable support for all AM/FM regional bands
- 2-wire control interface
- Mono/Stereo and valid station indicator
- Digital volume support
- Bass/Treble support
The Si484x multi-band receivers are available in a 24-pin SSOP package. Samples and production quantities of the Si484x radio ICs are available now. The Si4840 AM/FM radio IC is priced at $1.81 (USD), and the Si4844 AM/FM/SW radio IC is priced at $1.96 (USD), both in 10,000-unit quantities. The Si4840-DEMO and Si4844-DEMO evaluation kits are each priced at $50.00 (USD MSRP). More InformationDatasheet