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Crystal filter UM-5*2, 21.400MHz,4POLES, Pass Band Width ±15KHz@3dB, Stop Band Width ±50KHz@40dB, Pass Band Ripple 1.0dB max, Insertion Loss 2.0dB max, Terminating Impedance 3300Ω/0.5PF/4.0PF, Operable temperature rang -20~+70℃