ECS-1618 SMD Clock Oscillators ECS ECS-1618 SMD Clock Oscillators are offered in a 2.0mm x 1.6mm x 0.9mm package with an enable/disable function. The CMOS output devices feature a 1.8V voltage supply, a ±50ppm frequency stability, and an operating temperature range of -40°C to +85°C. ECS ECS-1618 SMD Clock Oscillators are ideal for high-density applications.