The TC0583A from Tai-Saw Technology is a SAW Resonator with Frequency 303.777 to 303.927 MHz, Centre Frequency 303.852 MHz, Insertion Loss 1.3 to 1.8 dB, Capacitance 3.85 pF, Voltage 5 V. Tags: Surface Mount, SAW Resonator. More details for TC0583A can be seen below.