With a frequency of 32.768 kHz, the surface mount device is optimized for a standard 12.5 pF load capacitance, with an optional load capacitance of 9 pF available. Frequency tolerance is ±20 PPM at 25°C and frequency stability is -0.04 ppm/(change in C°)2 over the standard operating temperature of -40 to 85°C.
Turnover temperature range is 20 to 30°C and storage temperature is -55 to 125°C. Maximum equivalent series resistance of the FX122 crystal is 90 k ohm and insulation resistance is 500 megaohm at 100 VDC. Aging is ±3 PPM per year. The termination finish is gold over nickel.The watch crystal is RoHS-compliant and comes standard in a 3,000-unit tape and reel for automatic assembly systems.