The OX-220 from Vectron International is a OCXO with Frequency 10 to 40 MHz, Supply Voltage 3.3 to 5 V, Phase Noise -120 dBc/Hz, Phase Noise 10 kHz -150 dBc/Hz, Frequency Stability ±10 ppb. Tags: Surface Mount. More details for OX-220 can be seen below.