The M618x Series from MtronPTI is a TCXO with Frequency 8 MHz - 52 MHz, Supply Voltage 3.0 V, 3.3 V, 5.0 V, Temperature Stability ±0.10 ppm, ±0.14 ppm, ±0.2 ppm, ±0.3 ppm, ±0.5 ppm, ±1.0 ppm, ±2.0 ppm, ±2.5 ppm, ±4.6 ppm, Operating Temperature -40 °C to +85 °C. Tags: Surface Mount. More details for M618x Series can be seen below.