The ECS-.327-12.5-16-TR is a miniature 32.768 KHz SMD tuning fork crystal designed for low power RTC applications. It operates with a specified load capacitance of 12.5 pF and features a frequency tolerance of ±20 ppm at +25°C. The device has a maximum equivalent series resistance (ESR) of 90 kΩ and a typical shunt capacitance of 1.3 pF. Housed in a compact 1.6 x 1.0 mm footprint, this crystal supports an extended operating temperature range from -40°C to +85°C. Its features make it ideal for IoT devices, LoRa WAN technology, and real-time clock functions in systems like those using STM32 microcontrollers.