RF1439E

Overview

The RF1439E is a surface-acoustic-wave (SAW) bandpass filter manufactured by RFMi, designed for front-end selectivity in wireless applications. It operates at a center frequency of 315.0 MHz with a range of 314.9 MHz to 315.1 MHz and a bandwidth of 900 kHz. The component features a voltage rating of 12 V and utilizes SMD/SMT termination styles within a compact package. It is engineered to provide low-loss signal conditioning for transmitters requiring precise frequency control.

Feature Summary

• Surface-acoustic-wave technology for high-selectivity signal filtering
• Compact design suitable for space-constrained board mounting
• Optimized for low insertion loss in transmitter front-ends

Applications

• Wireless remote keyless entry systems
• Alarm system transmitters
• Industrial telemetry links

Procurement Notes

Verify the specific datasheet version from RFMi or authorized distributors to confirm mechanical dimensions and electrical tolerances. Ensure compatibility with the target PCB footprint and reflow soldering profiles. Confirm that the 12 V rating meets the circuit requirements. Check for RoHS compliance status if required by the end product specifications.

Selection Notes

Select this component when a narrow 900 kHz bandwidth is required at 315 MHz. It is appropriate for designs prioritizing low insertion loss and small form factor. Consider the SMD package type for automated assembly processes. Evaluate thermal performance against the operating temperature range specified in the official documentation.

Part Context

This part belongs to the RF series of SAW filters from RFMi, an Akoustis brand. These components are distinct from the SF series, which typically targets different frequency bands such as 776-798 MHz. The RF1439E is specifically engineered for 315 MHz ISM band applications, offering a specialized solution compared to broader-bandwidth alternatives.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify pinout and impedance matching before considering any alternative SAW filters from other manufacturers.