SI4311-B1C-GM

RF Receivers Overview

The SI4311-B1C-GM is a fully integrated FSK CMOS RF receiver designed for unlicensed UHF bands, specifically 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 is housed in a QFN-20 package measuring 3 mm x 3 mm x 0.85 mm. It supports surface mount installation and functions within a temperature range of -40 °C to +85 °C.

RF Receivers Feature Summary

• Fully integrated single-chip FSK receiver architecture
• Optimized for sub-GHz ISM band applications
• Low power consumption design for battery operation

RF Receivers Applications

• Remote keyless entry systems
• Wireless sensor networks
• Alarm system receivers

RF Receivers Procurement Notes

Verify the End of Life (EOL) status prior to procurement. Silicon Labs has announced EOL and Last Time Buy periods for the Si4311 series. Confirm availability through authorized distributors or assess alternative components if long-term supply is required.

RF Receivers Selection Notes

Select this component for simple FSK reception needs in the 315/433 MHz bands. Ensure the application does not require transmission capabilities, as this is a receiver-only device. Verify that the QFN-20 footprint fits the PCB layout constraints.

RF Receivers Part Context

This part belongs to the Si4311 family of low-cost, high-performance RF receivers. It is distinct from transceiver models like the Si443x or SoCs like the EFR32 series, focusing solely on receiving FSK modulated signals without complex protocol stacks.

RF Receivers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation due to the product's End of Life status.