SF1189B

Overview

The Murata Electronics SF1189B is a Surface Acoustic Wave (SAW) bandpass filter designed for WLAN applications. It operates at a center frequency of 280 MHz with a bandwidth of 19.8 MHz and an insertion loss of 8.3 dB. The component utilizes an 8-SMD, no-lead package measuring 5.00 mm x 5.00 mm with a maximum height of 1.70 mm. It supports surface mount installation and complies with RoHS3 standards.

Feature Summary

• Surface acoustic wave technology for RF signal conditioning
• Optimized for wireless local area network operations
• Compact leadless surface mount construction

Applications

• Wireless LAN systems
• RF front-end modules
• Signal conditioning circuits

Procurement Notes

Verify the specific suffix designation when sourcing replacements, as variants such as SF1189B-1 may exhibit different electrical characteristics or compliance statuses compared to the base model. Confirm current availability status, as this product line has been marked as obsolete by the manufacturer. Ensure compatibility with existing PCB footprints and thermal management requirements during integration planning.

Selection Notes

Select this component for designs requiring precise filtering at 280 MHz within compact form factors. Evaluate the 8.3 dB insertion loss against system link budget constraints. Consider the 8-SMD package dimensions for space-constrained layouts. Verify that the operating temperature range meets environmental specifications for the intended deployment scenario.

Part Context

This device belongs to the SF series of SAW filters manufactured by Murata Electronics. It serves as a specialized passive component for radio frequency signal processing. The part is distinct from other series members by its specific 280 MHz center frequency and WLAN-oriented bandwidth profile.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.