2pcs 4mhz Crystal

Description

The 4 MHz Crystal Oscillator module is designed to handle off-chip crystals that have a frequency of4 to16mhz. The crystal oscillator ís output is fed to the System PLL as the input reference. The oscillator design generates low frequency and phase jitter, which is recommended for USB operation. This document contains an overview of the on-chip oscillator design and parameters for the crystal model which are derived from both simulation and empirical data analysis. Recommendations and requirements for selecting a 4 MHz crystal are also covered. Finally, the document has guidelines and a detailed description of oscillator circuit design and PCB layout