SF2438D

Overview

The SF2438D is a Surface Acoustic Wave (SAW) bandpass filter manufactured by RFMi, an Akoustis brand. Designed for general-purpose RF applications, it operates at a center frequency of 509 MHz with a bandwidth of 18 MHz, covering the range from 500 to 518 MHz. The component features a 50 Ohm impedance and offers a low insertion loss of 2.3 dB. It is housed in an SM3838-8 surface-mount package and supports board mounting.

Feature Summary

• Utilizes Surface Acoustic Wave technology for signal conditioning
• Provides low insertion loss for efficient signal transmission
• Designed for general-purpose RF filtering applications

Applications

• General purpose RF signal filtering
• Wireless communication systems
• Transmitter frequency control elements

Procurement Notes

Verify the manufacturer designation carefully, as RFMi products are now produced under Akoustis or Murata stewardship following corporate transitions. Confirm that the specific batch corresponds to the current production line standards. Ensure compatibility with the specified SM3838-8 footprint during procurement planning to avoid integration issues with existing designs.

Selection Notes

Select this component when a 509 MHz center frequency with an 18 MHz bandwidth is required. The 2.3 dB insertion loss makes it suitable for applications prioritizing signal integrity within the 500-518 MHz range. Ensure the design accommodates the SM3838-8 SMD package dimensions and thermal requirements for reflow soldering.

Part Context

The SF2438D belongs to the RFMi SAW filter family, which includes various resonators and filters based on SAW, Xtal, and Ceramic technologies. These components are engineered for digital and wireless markets, serving as critical frequency control elements in transmitters and receivers.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to potential manufacturing transitions between RFMi, Akoustis, and Murata, verify exact pinout and electrical equivalence before substituting with other SAW filters.