SI4055-C2A-GMR

RF Transmitter Overview

The SI4055-C2A-GMR is a sub-GHz RF transmitter from Silicon Labs' EZRadio series, designed for low-power wireless applications. It operates within the 284 MHz to 960 MHz frequency range and supports FSK and OOK modulation schemes. The device delivers a maximum output power of 13 dBm and achieves data rates up to 500 kbps. It functions on a supply voltage between 1.8 V and 3.6 V and utilizes an SPI interface for control. The component is housed in a 20-VFQFN package with an exposed pad, suitable for surface-mount installation across a temperature range of -40°C to 85°C.

RF Transmitter Feature Summary

• Integrates plug-and-play simplicity with flexible configuration options for diverse wireless protocols.
• Supports multiple modulation formats including Frequency Shift Keying (FSK) and On-Off Keying (OOK).
• Features a high-performance receiver section with integrated automatic gain control and digital signal processing.

RF Transmitter Applications

• Wireless sensor networks
• Remote keyless entry systems
• Industrial monitoring and control

RF Transmitter Procurement Notes

Verify the specific suffix 'GMR' indicates the reel packaging variant when sourcing components. Confirm that the C2A revision matches the design requirements, as errata documents exist for this silicon revision. Ensure the 20-VFQFN footprint aligns with the PCB layout specifications. Check RoHS compliance status for environmental regulations. Validate the operating voltage range against the target system's power supply constraints before finalizing procurement.

RF Transmitter Selection Notes

Select the SI4055-C2A-GMR for applications requiring only transmission capabilities without receiving functionality. This part is distinct from transceiver models like the SI446x series, which include receiver chains. Consider the 13 dBm output power limit when determining antenna requirements and link budget. The 500 kbps maximum data rate suits moderate throughput needs. Evaluate the 284-960 MHz range against regional ISM band allocations. The SPI interface compatibility should be verified with the host microcontroller.

RF Transmitter Part Context

This component belongs to the EZRadio family, known for simplified design-in processes. The SI4055 is a dedicated transmitter, contrasting with the full-duplex transceivers in the same product line. The C2A designation refers to the specific silicon revision, which may have associated errata sheets. The GMR suffix typically denotes tape and reel packaging for automated assembly. It serves as a cost-effective solution for simple uplink communication tasks in sub-GHz ISM bands.

RF Transmitter Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. For direct functional replacement, consider other EZRadio transmitters such as the SI4055-C2A-GM if reel packaging is not required. Transceiver alternatives like the SI4460 or SI4461 offer additional reception capabilities but differ in architecture and pinout. Verify compatibility with existing firmware and hardware designs when switching between these variants.