SF1141B-4

Overview

The SF1141B-4 is a Surface Acoustic Wave (SAW) bandpass filter manufactured by RFMi. It operates with a center frequency of 75 MHz and features a bandwidth of 14.86 MHz, as specified in Mouser documentation, while other sources cite 13.5 MHz or 10SMD packaging variants. The device has a voltage rating of 30 V and provides insertion loss characteristics around 12.5 dB to 12.5 dB. It is housed in a 12-SMD, No Lead package, designed for signal conditioning in intermediate frequency applications.

Feature Summary

• Utilizes Surface Acoustic Wave technology for precise signal filtering
• Designed specifically for Intermediate Frequency (IF) processing
• Optimized for Satellite Digital Audio Radio Service (SDARS) RF applications

Applications

• Intermediate Frequency (IF) filtering in radio receivers
• Satellite Digital Audio Radio Service (SDARS) front-end modules
• RF signal conditioning in broadcast equipment

Procurement Notes

Verify the specific datasheet version when ordering, as bandwidth specifications vary between 13.5 MHz and 14.86 MHz across different distributor listings. Confirm the package type matches your PCB footprint requirements, noting references to both 12-SMD and 10SMD configurations. Ensure compatibility with 30 V voltage ratings for your circuit design before finalizing procurement.

Selection Notes

Select this component for applications requiring a 75 MHz center frequency SAW filter. Consider the specific bandwidth requirement (13.5 MHz vs 14.86 MHz) based on system tolerance. Verify that the 12-SMD no-lead package aligns with assembly capabilities. This part is suitable for SDARS and IF stages where compact size and high selectivity are necessary.

Part Context

The SF1141B-4 belongs to RFMi's SAW filter portfolio, which focuses on signal conditioning components for wireless communication systems. These filters are engineered to provide sharp roll-off characteristics and low insertion loss, essential for maintaining signal integrity in crowded RF spectrums used in satellite audio and broadcast technologies.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided source material. Cross-referencing requires matching center frequency, bandwidth, and package dimensions with alternative SAW filters from other manufacturers.

FAQ

What is the center frequency of the SF1141B-4?

The center frequency is 75 MHz.

Is the SF1141B-4 RoHS compliant?

Yes, the component is listed as RoHS Compliant.