The XE66S-B00 from Xsis Electronics is a General Crystal Oscillator with Frequency 450 kHz to 90 MHz, Supply Voltage -0.5 to 7 V, Output_Voltage 0.5 to 2.5 V, Current 6 to 50 mA (Input Current), Output Load 10 KOhms. Tags: Thru-Hole. More details for XE66S-B00 can be seen below.