The XE643S-L00 from Xsis Electronics is a General Crystal Oscillator with Frequency 450 kHz to 125 MHz, Supply Voltage -0.5 to 5 V, Output_Voltage 0.1 to 0.9 V, Current 3 to 35 mA (Input Current), Load Capacitance 15 pF. Tags: Thru-Hole. More details for XE643S-L00 can be seen below.