The EX-400/401/405 from Vectron International is a OCXO with Frequency 10 to 80 MHz, Supply Voltage 3.3 to 5 V, Phase Noise -100 dBc/Hz, Phase Noise 10 kHz -145 dBc/Hz, Frequency Stability ±250 ppb. Tags: Surface Mount, Low G-Sensitivity. More details for EX-400/401/405 can be seen below.