The OC31E5S from Euroquartz Ltd is a OCXO with Frequency 1.25 to 100 MHz, Supply Voltage 0.2 to 5 V, Phase Noise -150 to -85 dBc/Hz, Phase Noise 1 kHz -145 dBc/Hz, Phase Noise 10 kHz -150 dBc/Hz. Tags: DIP. More details for OC31E5S can be seen below.