SI4421-A1-FTR

RF Transceiver ICS Overview

The SI4421-A1-FTR is a low-power, multi-channel FSK transceiver from Silicon Labs designed for sub-GHz ISM band applications. It operates within a frequency range of 430.24 MHz to 929.27 MHz and supports a maximum data rate of 256 kb/s. The device functions on a supply voltage between 2.2 V and 3.8 V, with typical operating voltage at 3.3 V. Key electrical parameters include a receive current of 13 mA, transmit current of 24 mA, output power of 7 dBm, and sensitivity of -110 dBm. It utilizes an SPI interface and is housed in a TSSOP-16 package.

RF Transceiver ICS Feature Summary

• Supports FSK modulation for reliable communication in sub-GHz ISM bands
• Integrates high receiver sensitivity and configurable output power for extended range
• Features low power consumption suitable for battery-operated wireless devices
• Includes flexible channel configuration capabilities for multi-channel operation

RF Transceiver ICS Applications

• FCC and ETSI compliant wireless sensor networks
• Industrial automation and remote monitoring systems
• Smart metering and utility infrastructure
• Asset tracking and logistics solutions

RF Transceiver ICS Procurement Notes

Verify component authenticity through authorized channels due to the NRND status. Confirm package integrity upon receipt as the part is supplied in reel packaging. Ensure compatibility with existing firmware stacks, as Silicon Labs provides specific SDKs for this series. Check for any recent discontinuance notifications or lifecycle changes before finalizing procurement plans.

RF Transceiver ICS Selection Notes

Select this component for applications requiring robust sub-GHz connectivity with moderate data rates. Consider the TSSOP-16 footprint for PCB layout constraints. Evaluate power budget requirements against the specified 13 mA receive and 24 mA transmit currents. Ensure the design supports the required SPI interface timing and voltage levels for reliable control.

RF Transceiver ICS Part Context

This part belongs to the Si4421 family of universal ISM band transceivers. It shares architectural similarities with other Si446x series devices but is optimized for specific sub-GHz frequencies. The A1 suffix typically denotes specific manufacturing lot or revision details, while FTR indicates tape and reel packaging for surface mount assembly.

RF Transceiver ICS Replacement Considerations

The datasheet lists the related device Si4421-IC CC16 as a similar RF transceiver option. Verify pinout and register compatibility when considering substitutes. Note that the SI4421-A1-FTR is marked as Not Recommended for New Designs (NRND); evaluate long-term availability risks.