The SIT3821AI-1D2-33EZ45.158400 with SMD Oscillators (XO) 45.1584MHz ±25ppm SMD-7050_6P RoHS is a surface-mount oscillator manufactured by the company SiTime. It is a low cost, low power, small form factor device that is RoHS compliant and offers frequency accuracy of ±25ppm. It is designed for embedded systems requiring high frequency accuracy and stability over temperature, and vibration. The product has a fast start-up, callibrates in 1 to 2 milliseconds, and features adjustable drive strength, enabling longer bus lengths. It also has a low EMI emission, an ultra low phase noise profile, and is available in industrial temperature range.