The FI168L0628M4-T is a SAW (Surface Acoustic Wave) filter manufactured by Taiyo Yuden. It is designed for RF applications, specifically for filtering signals at a particular frequency band around 628 MHz. These filters are used to selectively pass signals within a desired frequency range while attenuating unwanted signals outside that range.

Applications:

• Cellular Communication Systems: Used in mobile phones and base stations to filter specific frequency bands.
• Wireless Data Transmission: Employed in wireless modems and routers for clean signal transmission.
• GPS Receivers: Integrated into GPS devices to improve signal reception.
• RF Transceivers: Utilized in various RF transceivers to eliminate unwanted frequencies.
• Radio Broadcasting Equipment: Used to refine the output signal of radio transmitters.

Features:

• Precise Frequency Filtering: Accurately filters signals within a specific frequency range.
• Low Insertion Loss: Minimizes signal attenuation within the passband.
• High Attenuation: Effectively rejects signals outside the passband.
• Compact Size: Available in a small surface-mount package.
• Surface Mount Technology (SMT): Compatible with automated assembly processes.

Benefits:

• Enhanced Signal Clarity: Improves the quality of transmitted and received signals.
• Reduced Interference: Minimizes the impact of unwanted signals on desired signals.
• Improved System Performance: Increases the overall efficiency and reliability of wireless systems.
• Simplified Design: Easy integration into RF circuits.
• Cost-Effective Solution: Provides high performance at a competitive price.

Additional Details:

The FI168L0628M4-T SAW filter has a center frequency of approximately 628 MHz. It exhibits low insertion loss, typically less than 3 dB, and high attenuation in the stopband, often greater than 20 dB. It's designed for surface mount assembly. The operating temperature range usually spans from -40°C to +85°C. Proper impedance matching is crucial, often requiring a 50-ohm impedance. The datasheet should be consulted for precise electrical characteristics and PCB layout recommendations.