SF2242B

Overview

The SF2242B is a Surface Acoustic Wave (SAW) bandpass filter manufactured by RFMi. It operates at a center frequency of 40 MHz with a specified bandwidth of 5 MHz. The device features a 50 Ohm impedance and utilizes an SMP-3-10 surface-mount package. Key electrical characteristics include a minimum insertion loss ranging from 9.5 dB to 12.0 dB. This component is designed for signal conditioning in wireless communication systems requiring precise frequency selection.

Feature Summary

• Surface Acoustic Wave technology for effective signal filtering
• Bandpass configuration centered at 40 MHz
• Designed for low-power wireless applications

Applications

• Wireless communication modules
• Machine-to-machine (M2M) connectivity devices
• Signal conditioning circuits

Procurement Notes

Verify the specific datasheet version for exact insertion loss tolerances, as values may vary between 9.5 dB and 12.0 dB depending on test conditions. Confirm the SMP-3-10 package dimensions against your PCB footprint requirements. Ensure compliance with RoHS standards if required by your manufacturing process. Cross-reference the 5 MHz bandwidth specification with your system's frequency planning needs.

Selection Notes

Select this component when a narrowband SAW filter is required at 40 MHz. Consider the insertion loss range of up to 12.0 dB when designing amplifier stages or link budgets. The 50 Ohm impedance matches standard RF transmission lines. Evaluate the SMD package size for space-constrained designs within the SMP-3-10 form factor.

Part Context

RFMi specializes in timing and frequency products for emerging wireless applications. The SF2242B belongs to their lineup of RF components supporting M2M connections. This part complements their broader portfolio of ceramic filters and antennas used in WiFi, GPS, and LTE technologies.

Replacement Considerations

No public substitute part numbers are confirmed in available documentation.