The XO5166 and XO5167 Series from MtronPTI is a OCXO with Frequency 10 MHz - 53 MHz, Supply Voltage 3.3 V to 5.0 V, Frequency Stability ±0.1 ppb, ±0.2 ppb, ±0.5 ppb, ±250 ppb, Temperature Stability 100 to 280 ppb, Stability ±0.1 ppb, ±0.2 ppb, ±0.5 ppb, ±250 ppb. Tags: DIP. More details for XO5166 and XO5167 Series can be seen below.