The TC0548A from Tai-Saw Technology is a SAW Resonator with Frequency 303.75 to 303.9 MHz, Centre Frequency 303.825 MHz, Insertion Loss 1.3 to 1.8 dB, Capacitance 3.88 pF, Voltage 5 V. Tags: Surface Mount, SAW Resonator. More details for TC0548A can be seen below.