SF1140B-2

Overview

The Murata SF1140B-2 is a Surface Acoustic Wave (SAW) filter designed for radio frequency applications. It operates at a center frequency of 75.00 MHz with a bandwidth of 4.2 MHz and provides an insertion loss of 11 dB. The component is housed in a compact 10-SMD, No Lead package suitable for surface mount technology. It supports an operating temperature range from -40°C to +105°C, ensuring reliability in various environmental conditions.

Feature Summary

• Utilizes Surface Acoustic Wave technology for precise signal filtering
• Designed for specific RF frequency selection applications
• Compact surface mount package facilitates automated assembly

Applications

• Satellite Digital Audio Radio Service (SDARS)
• RF front-end filtering
• Frequency selection circuits

Procurement Notes

Verify the exact datasheet version before procurement, as specifications may vary by revision. Confirm that the 10-SMD No Lead package matches your PCB footprint requirements. Ensure the operating temperature range meets your system's environmental constraints. Cross-reference the part number with official Murata documentation to avoid counterfeit components.

Selection Notes

Select this component when a narrow bandpass filter around 75 MHz is required for SDARS or similar applications. Consider the 11 dB insertion loss impact on system gain. Evaluate the thermal performance within the specified -40°C to +105°C range. Compare against alternative SAW filters if tighter bandwidth or lower loss is needed.

Part Context

This SAW filter belongs to Murata's portfolio of passive RF components. It complements other frequency control devices like resonators and oscillators. The technology leverages acoustic wave propagation for high-selectivity filtering without active power consumption.