The RTV-2520 from Raltron is a VCTCXO with Frequency 13 to 52 MHz, Supply Voltage 1.8 to 3.3 V, Frequency Stability ±0.5 to ±2.5 ppm, Current 2.5 mA (Input Current), Load Capacitance 10 pF. Tags: Surface Mount. More details for RTV-2520 can be seen below.