ZM-145 Tuning Fork Crystal Electrical Specifications: ITEM Specification Nominal Frequency 32.768KHz Storage Temperature Range -55C to +125C Operating Temperature Range -40C to +85C Frequency tolerance +/-20 ppm Resonance Resistance(R) 65K max. Load Capacitance(CL) 12.5pF Shunt Capacitance (Co) 0.8 pF TYP Motional capacitance(c1) 1.9 fF TYP Drive Level 1 uW max Aging +/-3ppm/year @25C Insulation Resistance 500M min at DC 100V SHENZHEN LUGUANG ELECTRONIC TECHNOLOGY CO.,LTD.