ECS' ECX-12R miniature SMD 32.768 kHz crystal offers extremely low ESR 50 kΩ (typical) and a maximum of 70 kΩ. The 2.0 mm x 1.2 mm x 0.6 mm (LWH) ceramic package is ideal for IoT applications. The standard version has a frequency tolerance of ±20 ppm at +25°C, and the C version offers a ±10 ppm tolerance at +25°C. The available load capacitance is 6 pF, 7 pF, 9 pF, or 12.5 pF with an operating temperature of -40°C to +85°C.