SI4455-B1A-FM

RF Transceiver ICS Overview

The SI4455-B1A-FM is a low-current sub-GHz EZRadio transceiver by Silicon Labs, operating in the 283MHz to 960MHz range. It supports FSK, GFSK, and OOK modulation with a maximum data rate of 500kbps. The device features +13dBm output power and -116dBm sensitivity. Supply voltage ranges from 1.8V to 3.6V. Receive current is 10mA, while transmit current is 18mA at 10dBm. Standby current is 50nA. It utilizes a 20-QFN (3x3) package and operates between -40°C and 85°C.

RF Transceiver ICS Feature Summary

• Integrates TX/RX functionality with automatic frequency control and automatic gain control for reliable communication.
• Includes packet processing capabilities such as preamble detection, sync word detection, and CRC handling.
• Features an integrated battery voltage sensor and GPIOs for system monitoring and control.

RF Transceiver ICS Applications

• Remote control systems
• Home security and alarm systems
• Garage door openers
• Remote keyless entry

RF Transceiver ICS Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm that the specific suffix FM corresponds to the 20-QFN package variant. Check for official Product Change Notices regarding assembly site or packaging updates. Ensure design compliance with the stated operational temperature range and supply voltage limits.

RF Transceiver ICS Selection Notes

Select this component for applications requiring sub-GHz ISM band transmission with low power consumption. The integrated FIFO and packet processing reduce MCU load. Consider the 20-QFN footprint for space-constrained designs. Verify compatibility with required modulation schemes and data rates against application specifications.

RF Transceiver ICS Part Context

This part belongs to the Si4455 EZRadio family, designed for simple integration into IoT and wireless control systems. It offers a compact solution with minimal external components. The family targets general ISM bands under 1GHz, providing flexibility across global frequency allocations.

RF Transceiver ICS Replacement Considerations

Consult official substitution lists for equivalent RF transceivers. Verify pinout and register compatibility if replacing with other models in the EZRadio series. Ensure performance parameters meet original design requirements.