SF2248D

Overview

The RFMi SF2248D is a Surface Acoustic Wave (SAW) bandpass filter designed for signal conditioning applications. It operates at a center frequency of 314.45 MHz with a bandwidth of 5.7 MHz, covering a range from 313.85 MHz to 315.05 MHz. The component features a 50 Ohm impedance and a maximum insertion loss of 1.7 dB. Rated for 3 V, it utilizes an 8-SMD, No Lead package in the SM-3838-8 form factor. It supports board mounting and functions within a temperature range of -40°C to +125°C. The device holds AEC-Q200 qualification.

Feature Summary

• Surface Acoustic Wave technology for precise signal filtering
• AEC-Q200 qualified for automotive reliability standards
• Compact surface-mount design for space-constrained PCBs

Applications

• Automotive communication systems requiring robust signal integrity
• General purpose RF signal conditioning circuits
• Bandpass filtering in wireless transceiver front-ends

Procurement Notes

Verify the specific package variant against the schematic, as the SF series includes multiple footprint options such as SM-3030-6. Confirm that the operating environment stays within the specified -40°C to +125°C thermal limits. Ensure the circuit impedance matches the 50 Ohm specification to maintain the rated 1.7 dB insertion loss. Check for any required ESD precautions during handling due to the sensitive SAW structure.

Selection Notes

Select this component when a narrow 5.7 MHz bandwidth is required around 314.45 MHz. The 3 V rating suits low-power logic interfaces. Compare against the SF2248E-1 if a smaller SM-3030-6 package or different temperature range (-30°C to +70°C) is acceptable. The higher temperature tolerance and AEC-Q200 status make it suitable for harsher environments than standard commercial filters.

Part Context

Part of the RFMi SF series of SAW filters, which are engineered for high-frequency signal processing. This series emphasizes compact SMD footprints and stable performance across wide temperature ranges. The SF2248D specifically targets applications needing reliable bandpass characteristics in the 314 MHz region.

Replacement Considerations

SF2248E-1 offers similar electrical performance but uses an SM-3030-6 package and has a narrower operating temperature range.