SF2281D

Overview

The RFMi SF2281D is a Surface Acoustic Wave (SAW) filter designed for signal conditioning applications. It operates at a center frequency of 313.15 MHz and 314 MHz, covering ranges from 313.05 MHz to 313.25 MHz and 313.9 MHz to 314.1 MHz. The component features a bandwidth of 200 kHz with an insertion loss of 3.5 dB. It utilizes an 8-SMD, no-lead package and meets AEC-Q200 qualification standards for automotive reliability.

Feature Summary

• Surface Acoustic Wave technology for precise RF signal filtering
• Dual-frequency operation supporting 313.15 MHz and 314 MHz bands
• Automotive-grade AEC-Q200 qualification for enhanced reliability
• Compact surface-mount packaging for automated assembly

Applications

• General purpose RF signal conditioning
• Automotive electronics systems requiring AEC-Q200 components
• Wireless communication modules operating in the specified frequency bands

Procurement Notes

Verify the specific frequency variant required, as the SF2281D supports both 313.15 MHz and 314 MHz configurations. Confirm that the 8-SMD no-lead package aligns with your PCB footprint design. Ensure compliance with AEC-Q200 requirements if deploying in automotive environments. Cross-reference datasheet specifications for insertion loss and bandwidth tolerances against system constraints before finalizing procurement.

Selection Notes

Select this component when dual-band SAW filtering is necessary for RF signal integrity. The AEC-Q200 certification makes it suitable for automotive applications where high reliability is mandatory. Consider the 200 kHz bandwidth and 3.5 dB insertion loss characteristics to ensure compatibility with adjacent channel requirements. The SMD package facilitates efficient surface-mount assembly processes.

Part Context

The SF2281D belongs to the RFMi SAW filter series, which provides specialized signal conditioning solutions. These filters are engineered for high performance in compact form factors. The product line emphasizes reliability through automotive qualifications, making it a standard choice for robust electronic designs requiring precise frequency selection.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pinout and electrical parameters carefully when considering alternative SAW filters from other manufacturers to ensure functional equivalence.