Specification Parameter Symbol Specification Options Nominal Frequency fo 32.768KHz Frequency Tolerance @25°C f/fo ±20~100ppm @25°C Please specify Frequency v Temperature f/fo Please refer to plot on page 2 Temp Operating Range Topr -40 ~ +85°C Turnover Temperature Tm 25°C ±5°C Temperature Coefficient -0.037ppm / °C2 Typical Temp Storage Range Tstg -55 ~ +125°C Equivalent Series Resistance ESR 40K max Quality Factor Q 60K Typical Load Capacitance CL 12.5pF standard (6pF to 12.5pF available) Please specify Shunt Capacitance C0 1.4+/-0.2pF Capacitance Ratio C0/1 450 Typical Motional Capacitance C1 0.003pF Typical Drive Level DL 1 W max Insulation Resistance IR 500M @ 100VDC min Aging Fa ±5ppm max First year, 25±3°C 3ppm max available Max Reflow temperature Tmax 235°C for 4 seconds Refer to page 2 Lead Surface Material SnCu Solder Footprint . Please note that all parameters can not necessarily be specified in the same device Customer to specify : Fr