SI4461-C2A-GMR

RF Transceiver ICS Overview

The SI4461-C2A-GMR is a sub-GHz RF transceiver IC from Silicon Labs, designed for ISM band applications. It operates within a frequency range of 142MHz to 1.05GHz and supports data rates up to 1Mbps. The device features an output power of 16dBm and a sensitivity of -129dBm. It accepts supply voltages between 1.8V and 3.6V, with receive currents ranging from 10.9mA to 13.7mA and transmit currents from 33.5mA to 43mA. Communication is managed via an SPI interface, and it includes four GPIOs. The component is housed in a 20-VFQFN package with exposed pads.

RF Transceiver ICS Feature Summary

• Supports multiple modulation formats including 4GFSK, GFSK, GMSK, and OOK for versatile communication protocols.
• Integrates a low-IF architecture optimized for general ISM band applications below 1GHz.
• Features a flexible serial peripheral interface (SPI) for efficient control and data transfer.

RF Transceiver ICS Applications

• Wireless sensor networks
• Industrial monitoring systems
• Smart metering devices

RF Transceiver ICS Procurement Notes

Verify the specific revision suffix C2A against the latest Silicon Labs errata sheets to ensure compatibility with intended firmware implementations. Confirm that the 20-QFN package dimensions align with the target PCB footprint. Check for any recent production change notices regarding assembly sites or labeling updates that may affect long-term supply chain stability.

RF Transceiver ICS Selection Notes

Choose this component when a single-chip solution for sub-GHz ISM bands is required with moderate output power. Ensure the host microcontroller supports the necessary SPI speed and GPIO count. Consider the thermal performance of the QFN package if operating at maximum transmit power levels in enclosed environments.

RF Transceiver ICS Part Context

This part belongs to the Si446x family of EZRadioPRO transceivers. It shares architectural similarities with models like the SI4463 and SI4460 but differs in specific feature sets and memory configurations. The C2A designation indicates a specific hardware revision within the broader product line.

RF Transceiver ICS Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult official Silicon Labs cross-reference guides for potential alternatives.