SF2421D

Overview

The RFMi SF2421D is a Surface Acoustic Wave (SAW) bandpass filter designed for signal conditioning applications. It operates at a nominal frequency of 485 MHz with a bandwidth ranging from 480 MHz to 490 MHz. The component features a typical insertion loss of 4 dB and maintains a 50 Ohm impedance. It is rated for a maximum voltage of 3 V and functions within an operating temperature range of -45°C to +125°C. The device utilizes an SMD/SMT termination type and is housed in an SM-3838-8 package, measuring 3.80mm x 3.80mm.

Feature Summary

• Surface Acoustic Wave technology for precise signal filtering
• Bandpass configuration centered at 485 MHz
• High-temperature operational capability up to 125°C

Applications

• RF signal conditioning circuits
• Wireless communication systems requiring 485 MHz filtering
• General purpose RF SAW filter applications

Procurement Notes

Verify the manufacturer designation as RFMi or Akoustis, as both entities are associated with this part number in public records. Confirm the specific datasheet version matches the required electrical characteristics, particularly the insertion loss and bandwidth specifications. Ensure the package type corresponds to the SM-3838-8 form factor for proper board layout compatibility.

Selection Notes

Select this component when a narrow bandpass filter is required around the 485 MHz center frequency. The 10 MHz bandwidth suits applications needing moderate selectivity. Consider the 50 Ohm impedance match for standard RF interfaces. The wide temperature range makes it suitable for industrial or automotive environments where thermal stability is critical.

Part Context

The SF2421D belongs to the SF series of SAW filters manufactured by RFMi. These components are categorized under signal conditioning products, specifically bandpass filters. The series is designed for general-purpose RF applications, offering a balance between performance and size through its surface mount packaging.

Replacement Considerations

Public documentation does not confirm specific substitute part numbers for the SF2421D. Cross-referencing should be limited to components with identical 485 MHz center frequency, 10 MHz bandwidth, and 8-SMD package dimensions.