The VCTCXO2000QST3-12.800MHz from Dynamic Engineers is a TCVCXO with Frequency 12.8 MHz, Supply Voltage 3.3 V, Frequency Stability 0.37 ppm, Operating Temperature -40 to 85 Degree C. Tags: Surface Mount. More details for VCTCXO2000QST3-12.800MHz can be seen below.