The JT21SV from Jauch Quartz is a TCVCXO with Frequency 13 to 52 MHz, Supply Voltage 1.8 to 3.3 V, Tuning Voltage 0.9 to 1.5 V, Current 1.5 to 2.5 mA, Load Capacitance 10 pF. Tags: Surface Mount, Low Phase Noise. More details for JT21SV can be seen below.