FC-12M32.7680KA-AC3 is a 32.768 kHz crystal unit designed for precision timing in small communications devices and portable electronics. This fundamental-mode crystal operates over a temperature range of -40°C to +85°C with a nominal frequency of 32.768 kHz and a frequency tolerance of ±20 × 10?6 at +25°C. The unit features a compact surface-mount package measuring 2.05 × 1.2 × 0.6 mm with a load capacitance of 12.5 pF and a maximum motional resistance of 90 kO. With a maximum drive level of 0.5 µW and frequency aging of ±3 × 10?6 per year, this crystal provides stable, low-power timing for real-time clock applications, wearables, and battery-powered communication devices. The product is RoHS compliant and lead-free, meeting modern environmental standards.