SI4464-B1B-FM

RF Transceiver ICS Overview

The Silicon Labs SI4464-B1B-FM is a sub-GHz ISM band transceiver operating within the 119 MHz to 960 MHz frequency range. It supports maximum data rates of 1 Mb/s using FSK, GFSK, GMSK, MSK, and OOK modulation formats. The device delivers up to +20 dBm output power with receive sensitivity reaching -126 dBm. Powered by a 1.8 V to 3.6 V supply, it draws 13.7 mA during reception and 85 mA during transmission. It features an SPI interface and is housed in a QFN-20 package suitable for surface mount installation across a temperature range of -40°C to +85°C.

RF Transceiver ICS Feature Summary

• Integrates high-performance low IF architecture with built-in on-chip power amplifier for robust sub-GHz communication.
• Includes configurable packet handler, transmit/receive data FIFOs, wake-up timer, and general-purpose digital I/Os.
• Supports multiple modulation schemes including FSK, GFSK, GMSK, MSK, and OOK for flexible protocol implementation.

RF Transceiver ICS Applications

• Wireless metering and utility infrastructure
• Industrial control and automation systems
• Security and alarm system implementations

RF Transceiver ICS Procurement Notes

Verify the specific suffix 'FM' against official Silicon Labs documentation to confirm tape-and-reel packaging specifications. Ensure the selected variant matches the required frequency band and regulatory compliance standards for the target deployment region. Cross-reference the datasheet revision history to confirm component availability status and any potential assembly site changes affecting production.

RF Transceiver ICS Selection Notes

Choose this model when high output power up to +20 dBm is required alongside excellent receiver sensitivity. The integrated PA reduces external component count compared to lower-power variants. Verify that the QFN-20 package dimensions align with the PCB layout constraints. Confirm that the SPI interface speed requirements are compatible with the host microcontroller capabilities.

RF Transceiver ICS Part Context

The SI4464 belongs to the EZRadioPRO family of wireless transceivers designed for low current consumption and high performance. This series covers sub-GHz bands from 119 MHz to 1050 MHz. The SI4464 specifically targets applications requiring higher transmit power and robust link budgets compared to the SI4460 or SI4461 siblings.

RF Transceiver ICS Replacement Considerations

SI4464-B1B-FMR (Reel variant)