The SiT8008AI-12-18S-27.00000D is a silicon MEMS-based XO (Oscillators) manufactured by SiTime. It has an operating frequency of 27MHz ±25ppm and is packaged as a SMD-2520-4P RoHS. It is a highly stable and reliable oscillator designed to provide precise frequency accuracy in mission-critical applications, such as medical, automotive, lighting, and military/aerospace systems. It has an advanced frequency stability of -12 / +18 ppm from 0°C to +70°C (no offsets). This oscillator has a built-in EMI filter for added protection against interference. It includes built-in frequency trimming technology which allows the user to adjust frequency up to ±25 ppm. Its operating temperature range is -40°C to +85°C and it is RoHS compliant. This part is suitable for a variety of applications, including clock generators, data converters, communications equipment, test and measurement equipment, and consumer products.