The TC0237A from Tai-Saw Technology is a SAW Resonator with Frequency 666.5743 to 666.6343 MHz, Centre Frequency 666.6043 MHz, Insertion Loss 1.3 to 2.5 dB, Capacitance 3.28 pF, Voltage 12 V. Tags: Surface Mount, SAW Resonator. More details for TC0237A can be seen below.