SI4311-B12-GMR

RF Receivers Overview

The SI4311-B12-GMR is a fully integrated FSK CMOS RF receiver from Silicon Labs, designed for unlicensed UHF bands at 315 MHz and 433.92 MHz. It operates on a supply voltage ranging from 2.7 V to 3.6 V with a typical operating current of 20 mA. The component supports a maximum data rate of 10 kbps and features a sensitivity of -104 dBm. Encased in a 20-QFN package measuring 3 mm x 3 mm x 0.85 mm, it functions within a temperature range of -40°C to +85°C.

RF Receivers Feature Summary

• Fully integrated FSK CMOS architecture optimized for Sub-GHz applications
• Operates specifically in the 315 MHz and 433.92 MHz unlicensed UHF bands
• Surface-mount QFN packaging suitable for compact PCB designs

RF Receivers Applications

• Sub-GHz wireless communication systems
• Remote control devices
• Data logging equipment

RF Receivers Procurement Notes

Verify end-of-life status before integration, as this component may be discontinued. Confirm RoHS compliance details through official documentation. Ensure the specific B12 suffix matches the required frequency band (315/433.92 MHz) for your design. Check for moisture sensitivity handling requirements during storage and assembly processes.

RF Receivers Selection Notes

Select this part for low-speed, fixed-frequency FSK reception needs. It is suitable for designs requiring operation strictly within 315 or 433.92 MHz bands. Consider the 20 mA current consumption against battery life requirements. The QFN-20 package dictates specific footprint constraints for PCB layout.

RF Receivers Part Context

This device belongs to the Si4311 series of EZRadio receivers. It is distinct from other variants like the SI4313, which supports broader frequency ranges and higher data rates. The GMR suffix indicates tape-and-reel packaging. It serves as a specialized solution for simple, cost-effective Sub-GHz telemetry rather than complex multi-band transceivers.

RF Receivers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The product status is listed as End of Life. Designers should consult Silicon Labs for current alternatives or verify if generic compatible components meet the specific -104 dBm sensitivity and 10 kbps data rate requirements.