FC1610AN32.7680KA-R5 is a 32.768 kHz crystal unit designed for small communications devices and low-power timing applications. It operates at a nominal frequency of 32.768 kHz with a frequency tolerance of ±20 × 10?6 at +25°C and a drive level of 0.1 µW typical (0.5 µW maximum). The unit features an extremely compact form factor of 1.65 × 1.05 × 0.5 mm and operates reliably across a temperature range of -40°C to +85°C, with storage capability from -55°C to +125°C. With a motional resistance of 90 kO maximum, load capacitance options of 7 pF, 9 pF, or 12.5 pF, and frequency aging of ±3 × 10?6 per year, this crystal is ideal for real-time clock (RTC) applications, wearable devices, and portable consumer electronics requiring precise low-frequency timing with minimal power consumption.