ECS ECS-390-CDX-2289 SMD Quartz Crystal features a 39MHz frequency range with ±8ppm frequency tolerance and 35Ω maximum equivalent series resistance (ESR). This AT-cut crystal offers ±35ppm frequency stability in a temperature range of -40°C to +125°C. Other features include 10pF load capacitance, 100µW drive level, and fundamental oscillation mode. ECS ECS-390-CDX-2289 SMD Quartz Crystal has a 2mm x 1.6mm footprint with a height of 0.45mm. It is compliant with EU RoHS 2015/863 standards.