SF2489E

Overview

The RFMi SF2489E is a Surface Acoustic Wave (SAW) filter designed for signal conditioning applications. It operates at a center frequency of 916.5 MHz with a specified bandwidth of 2 MHz, covering a range from 915.5 MHz to 917.5 MHz. The component features a 50-ohm impedance and supports a maximum DC voltage rating of 3 V on non-ground terminals. It is housed in an 8-SMD surface-mount package. The device is rated for an input power level of 33 dBm within the passband and is suitable for general-purpose RF filtering tasks.

Feature Summary

• Surface Acoustic Wave technology for precise signal filtering
• General-purpose RF SAW filter design
• Compact surface-mount packaging

Applications

• General purpose RF signal conditioning
• Wireless communication systems operating near 916.5 MHz
• RF front-end filtering modules

Procurement Notes

Verify the specific package variant, as sources indicate both 6-pin SM-3030-6 and 8-SMD configurations. Confirm thermal soldering parameters, noting recommendations for peak temperatures around 260°C. Ensure the selected unit matches the required bandwidth specification of 2 MHz for your 916.5 MHz application. Cross-reference datasheets for exact pinout and mechanical dimensions before integration.

Selection Notes

Select this component when a narrow 2 MHz bandwidth is required at 916.5 MHz. The 3 V DC rating limits high-voltage applications. Compare against other RFMi SAW filters if different center frequencies or wider bandwidths are needed. Ensure the PCB layout accommodates the specific SMD footprint identified in the verified datasheet.

Part Context

The SF2489E belongs to the RFMi SF series of signal conditioning components. These devices utilize SAW technology to provide frequency-selective filtering in compact packages. The series targets RF applications requiring stable performance at specific carrier frequencies, such as ISM bands or specialized wireless protocols.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with alternative SAW filters by matching the 916.5 MHz center frequency, 2 MHz bandwidth, and 50-ohm impedance specifications.