SI4311-B1C-GMR

RF Receivers Overview

The SI4311-B1C-GMR is a Sub-GHz radio receiver manufactured by Silicon Labs, designed for low-power wireless applications. It operates within the UHF frequency range, specifically supporting 315 MHz and 433.92/434 MHz bands. The device functions on a supply voltage ranging from 2.7 V to 3.6 V, with a typical operating current of 20 mA. It is housed in a QFN-20 package measuring 3 mm x 3 mm x 0.85 mm, suitable for surface-mount installation. The component supports an operating temperature range from -40°C to +85°C.

RF Receivers Feature Summary

• Integrated Sub-GHz RF receiver architecture optimized for low power consumption
• Supports standard OOK modulation schemes for simple data transmission
• Compact QFN-20 package design facilitating space-constrained PCB layouts

RF Receivers Applications

• Remote keyless entry systems
• Wireless sensor networks
• Simplex telemetry data links

RF Receivers Procurement Notes

This component is officially classified as End-of-Life (EOL) by Silicon Labs. Last Time Buy notifications were issued historically, indicating that new production has ceased. Availability is strictly limited to existing stock or secondary market sources. Designers must verify authenticity and lot dates carefully when sourcing from non-direct distributors due to the discontinued status.

RF Receivers Selection Notes

Select this part only for maintenance or legacy system repairs where pin compatibility with existing designs is critical. For new projects, consider modern replacements within the EZRadio family that offer updated manufacturing support. Verify that the specific B1C suffix meets the required regulatory frequency band certifications for the target deployment region before procurement.

RF Receivers Part Context

The SI4311 series belongs to Silicon Labs' EZRadio product line, targeting cost-sensitive, low-data-rate wireless communication needs. The SI4311-B1C-GMR variant specifically addresses Sub-GHz ISM band requirements. It serves as a foundational receiver component for simple control and monitoring tasks, distinct from more complex transceivers found in the same manufacturer portfolio.

RF Receivers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the part is EOL, engineers should consult Silicon Labs for current recommended alternatives such as newer EZRadio transceiver models that maintain similar form factors or functional capabilities.