The M4S Series from MtronPTI is a XO with Frequency 19.44 MHz - 160 MHz, Supply Voltage 5.0 V, Temperature Stability ±20 ppm, ±25 ppm, ±30 ppm, ±50 ppm, ±100 ppm, ±500 ppm, ±1000 ppm, Operating Temperature -40 °C to +85 °C. Tags: Surface Mount. More details for M4S Series can be seen below.