The CR89/U-Series from Wi2Wi is a Space Qualified Crystal with Frequency Range 2.25 to 6.2 MHz, Equivalent Series Resistance 75 to 500 Ohms, Shunt Capacitance 7 pF, Load Capacitance 30 pF, Operating Temperature Range -55 to 90 Degree C. Tags: Through Hole. More details for CR89/U-Series can be seen below.