The TC0228A from Tai-Saw Technology is a SAW Resonator with Frequency 423.145 to 423.295 MHz, Centre Frequency 423.22 MHz, Insertion Loss 1.58 to 2.2 dB, Capacitance 2.95 pF, Voltage 12 V. Tags: Surface Mount, SAW Resonator. More details for TC0228A can be seen below.