SF1145B

Overview

The SF1145B is a Surface Acoustic Wave (SAW) filter manufactured by Murata Electronics, designed for signal conditioning applications. It operates at a center frequency of 427.25 MHz with a bandwidth of 30 MHz and an insertion loss of 3.5 dB. The component utilizes a 10-SMD package configuration suitable for board mounting.

Feature Summary

• Surface Acoustic Wave technology for precise signal filtering
• Optimized for intermediate frequency cable applications
• Compact surface-mount design

Applications

• Cable IF signal processing
• RF signal conditioning systems
• Intermediate frequency filtering in communication equipment

Procurement Notes

Verify the specific package variant and manufacturing date code against current Murata Electronics documentation before procurement. Confirm RoHS compliance status and ensure the supplier provides valid traceability records for this SAW filter component to maintain quality standards.

Selection Notes

Select the SF1145B when a 427.25 MHz center frequency and 30 MHz bandwidth are required for cable IF applications. Ensure the circuit design accommodates the 3.5 dB insertion loss and matches the 10-SMD footprint requirements for proper integration into the signal chain.

Part Context

This component belongs to Murata's SAW filter portfolio, specifically engineered for high-frequency signal integrity in cable television and broadband infrastructure. It serves as a critical passive element for isolating desired intermediate frequencies while rejecting out-of-band noise in receiver front-ends.