SF2189A

Overview

The SF2189A is a Surface Acoustic Wave (SAW) bandpass filter manufactured by RFMi. It operates at a center frequency of 140 MHz with a passband range of 139.37 MHz to 140.64 MHz. The device features an insertion loss of 11.3 dB and supports multiple bandwidth options including 33 MHz, 35 MHz, and 42.4 MHz. It utilizes a 12-SMD surface-mount package and is designed for board mounting applications.

Feature Summary

• Surface Acoustic Wave technology for signal conditioning
• Bandpass filtering capability centered at 140 MHz
• Compact 12-SMD surface-mount package design

Applications

• Intermediate Frequency (IF) RF signal processing
• Wireless communication systems requiring 140 MHz filtering
• Digital radio receiver front-ends

Procurement Notes

Verify the specific bandwidth variant required, as the component supports 33 MHz, 35 MHz, or 42.4 MHz options. Confirm the 12-SMD package compatibility with your PCB layout. Ensure the operating environment aligns with standard commercial temperature ranges unless otherwise specified in the detailed datasheet.

Selection Notes

Select this component when a SAW filter is needed for 140 MHz IF applications. Consider the 11.3 dB insertion loss impact on system gain. Evaluate the available bandwidth options against your channel spacing requirements. The SMD form factor suits automated assembly processes.

Part Context

This part belongs to the RFMi SAW filter portfolio, which includes components based on SAW, crystal, and ceramic technologies. RFMi is a brand under Akoustis, focusing on RF solutions for digital and wireless markets. The SF series typically addresses specific frequency bands for signal integrity.

Replacement Considerations

No public substitute part numbers are confirmed in the provided documentation. Cross-referencing requires matching the 140 MHz center frequency, 12-SMD package, and specific bandwidth characteristics.