Automotive Electronics Clock Tree Design Considerations

As automotive electronics adopt higher bandwidth processors, SoCs, and FPGAs, these designs and their associated timing requirements are becoming more complex, needing a higher number of reference clocks, in single- ended and differential formats, at varying frequencies. Additionally, RMS phase jitter performance requirements have become more stringent to meet the needs of higher speed Ethernet and PCI-Express. Satisfying this growing, diverse set of reference clock requirements can be simplified using frequency-flexible, AEC-Q100 qualified clock generators instead of legacy quartz- based timing components. 

In this paper you will learn how silicon-based timing solutions provide reliability, cost, and board space advantages over legacy quartz-based crystals and oscillators, while at the same time provide numerous additional features and benefits, such as spread spectrum clock generation, EMI suppression frequency tuning, redundancy, fault detection, and other health monitoring functions to help meet system safety goals.