SF2193E

Overview

The RFMi SF2193E is a Surface Acoustic Wave (SAW) bandpass filter designed for GPS RF applications. It operates at a center frequency of 1.228 GHz with a bandwidth of 20 MHz. The component features a 50 Ohm impedance and a maximum insertion loss of 3.4 dB. It supports a voltage rating of 3 V and utilizes an 8-SMD, no-lead surface mount package. The device functions within a temperature range of -40°C to +85°C.

Feature Summary

• Surface Acoustic Wave technology for precise signal conditioning
• Optimized for Global Positioning System radio frequency filtering
• Compact surface-mount design suitable for automated assembly

Applications

• GPS receiver front-end modules
• Satellite navigation systems
• RF signal conditioning circuits

Procurement Notes

Verify the specific datasheet version to confirm exact electrical tolerances and thermal specifications before integration. Ensure that the PCB footprint matches the 8-SMD no-lead package dimensions provided in the official mechanical drawings. Confirm RoHS compliance status and lead-free requirements align with local regulatory standards for the intended market.

Selection Notes

Select this component when a narrow 20 MHz bandwidth centered at 1.228 GHz is required for GPS signals. The low insertion loss of 3.4 dB helps maintain signal integrity in sensitive receiver chains. Consider the 8-SMD package size for space-constrained designs requiring robust surface-mount reliability.

Part Context

This part belongs to the SF series of SAW filters manufactured by RFMi. These components are engineered for high-frequency signal processing tasks where compact size and stable performance are critical. The series typically includes variants tuned for different cellular and navigation bands.

Replacement Considerations

Public confirmed substitutes include other RFMi SAW filters within the same series offering similar center frequencies and bandwidths. Verify pinout compatibility and thermal characteristics before substitution.