The 8008AI-12-18E-20.000000E part is a low-power, miniature oven-controlled, quartz-crystal-based oscillator (OCXO) made by SiTime Corporation. It has an output frequency of 20.000000 MHz and a temperature stability of ±1 parts per million (ppm). It features an integrated oven, which helps maintain temperature stability for extended periods of time, and ultra low power consumption, making it an ideal choice for power-sensitive applications. Overall, the 8008AI-12-18E-20.000000E is an ideal choice for time and frequency applications requiring superior performance, low power consumption, and low cost.