SF2445E

Overview

The SF2445E is a Surface Acoustic Wave (SAW) bandpass filter manufactured by RFMi. It operates at a center frequency of 846 MHz with a 3dB bandwidth of 1.7 MHz, covering a range from 845.38 MHz to 846.61 MHz. The component features a 50 Ohm impedance and an insertion loss of 4.7 dB. Rated for 3 V, it supports SMD/SMT board mounting in an 8-lead package without leads. Operating temperatures range from -45 C to +125 C. It holds AEC-Q200 qualification.

Feature Summary

• Surface Acoustic Wave technology for narrowband signal conditioning
• AEC-Q200 qualified for automotive reliability standards
• High-temperature operation capability up to 125 C

Applications

• Automotive RF communication systems
• Narrowband signal filtering applications
• General purpose RF SAW filter circuits

Procurement Notes

Verify the specific datasheet version from Akoustis or RFMi before integration, as specifications may vary between revisions. Confirm that the 8-SMD no-lead package footprint matches the target PCB layout. Ensure the supply chain source is authorized to guarantee AEC-Q200 certification validity. Check for any ordering suffixes that might indicate different packaging or testing criteria.

Selection Notes

Select this component when a narrow 1.7 MHz bandwidth is required at 846 MHz. The 4.7 dB insertion loss must be acceptable for the system link budget. The wide temperature range suits harsh environments. Verify that the 50 Ohm impedance aligns with the surrounding circuitry. Consider the SMD form factor for automated assembly processes.

Part Context

The SF2445E belongs to the SF series of SAW filters produced by RFMi, now part of Akoustis Technologies. These components are designed for high-reliability applications requiring precise frequency selection. The product line emphasizes automotive-grade durability and consistent performance across extreme temperature variations.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.