The XE642S-N00 from Xsis Electronics is a General Crystal Oscillator with Frequency 450 kHz to 120 MHz, Supply Voltage -0.5 to 4.5 V, Output_Voltage 0.1 to 0.9 V, Current 2.5 to 35 mA (Input Current), Load Capacitance 15 pF. Tags: Surface Mount. More details for XE642S-N00 can be seen below.