The CR64/U from Quantic Croven is a Space Qualified Crystal with Frequency Range 2.4 to 20 MHz, Equivalent Series Resistance 25 to 75 Ohms, Shunt Capacitance 1.7 to 7 pF, Load Capacitance 30 pF, Operating Temperature Range -55 to 105 Degree C. Tags: Through Hole. More details for CR64/U can be seen below.