The OH300-Series from Connor-Winfield is a OCXO with Frequency 5 to 40 MHz, Supply Voltage 3.3 to 5 V, Frequency Stability ±5.0 ppb, ±50 ppb, Stability ±5.0 ppb, ±50 ppb, Operating Temperature -40 to 85 °C. Tags: Surface Mount. More details for OH300-Series can be seen below.