SI4431-A0-FMR

Description：IC RF TXRX ISM<1GHZ 20QFN
Series：-
Mfr：Silicon Labs
Package：Tape & Reel (TR)

SKU:fe47a003518a Category: RF Transceiver ICs Brand: Silicon Labs

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Product introduction

SI4431-A0-FMR is listed in the RF Transceiver ICS range at ChipApex. The manufacturer field lists Silicon Labs. Its product description is IC RF TXRX ISM. Review the specifications below when checking this part for your BOM.

RF Transceiver ICS specifications for SI4431-A0-FMR

Description：IC RF TXRX ISM<1GHZ 20QFN
Series：-
Mfr：Silicon Labs
Package：Tape & Reel (TR)
Type：TxRx Only
RF Family/Standard：General ISM < 1GHz
Protocol：-
Modulation：FSK, GFSK, OOK
Frequency：240MHz ~ 930MHz
Data Rate (Max)：128kbps
Power - Output：13dBm
Sensitivity：-118dBm
Memory Size：-
Serial Interfaces：SPI
Voltage - Supply：1.8V ~ 3.6V
Current - Receiving：18.5mA
Current - Transmitting：28mA
Operating Temperature：-40°C ~ 85°C (TA)
Mounting Type：Surface Mount
Package / Case：20-VFQFN Exposed Pad
Supplier Device Package：20-QFN (4x4)
GPIO：3
Grade：-
Qualification：-

RF Transceiver ICS datasheet and documents for SI4431-A0-FMR

SI4431-A0-FMR

RF Transceiver ICS Overview

The Silicon Labs SI4431-A0-FMR is a sub-GHz RF transceiver operating within the 240 MHz to 930 MHz frequency range. It supports data rates up to 500 kb/s using FSK, GFSK, and OOK modulation formats. The device functions on a supply voltage between 1.8 V and 3.6 V, with a receive current of 13.7 mA and transmit current of 75 mA. It delivers an output power of +13 dBm and achieves sensitivity down to -121 dBm. The component is housed in a 20-VFQFN exposed pad package for surface mount installation.

RF Transceiver ICS Feature Summary

Integrates low-IF architecture for efficient sub-GHz wireless communication
Supports multiple modulation schemes including FSK, GFSK, and OOK
Features high receiver sensitivity for reliable long-range operation
Utilizes compact QFN packaging to minimize board space requirements

RF Transceiver ICS Applications

Wireless sensor networks
Industrial telemetry systems
Smart metering applications
Remote control devices

RF Transceiver ICS Procurement Notes

Verify the specific suffix 'A0' against official Silicon Labs documentation to confirm frequency band and feature set accuracy. Ensure the 'FMR' designation matches the required tape-and-reel packaging configuration. Cross-reference the 20-VFQFN package dimensions with PCB footprint guidelines. Confirm RoHS compliance status through the manufacturer's latest datasheet revision.

RF Transceiver ICS Selection Notes

Select this model when a sub-GHz transceiver with moderate data rates and high sensitivity is required. The +13 dBm output power suits short-to-medium range links. Consider the 1.8 V to 3.6 V operating range for battery-powered designs. Evaluate the 20-pin QFN package for space-constrained layouts compared to larger packages.

RF Transceiver ICS Part Context

The SI4431 belongs to the EZRadioPRO family of ISM band transceivers from Silicon Labs. This series emphasizes low current consumption and high integration for cost-sensitive applications. The A0 variant typically denotes specific frequency coverage within the supported sub-GHz bands, distinct from other variants like B1 which may offer different power or sensitivity profiles.