[原创] Silabs Si52258PCIe时钟发生器解决方案

Silabs公司的Si52258/54是用于PCIe Gen1/2/3/4/5公共时钟和/或SRIS的业界最高性能和最低功耗汽车级的PCIe时钟发生器,所有时钟和PCIe Gen1/2/3/4/5公共时钟与单独基准架构指标兼容,硬件控制引脚可用来启动和禁止输出,以及启动和禁止扩展频谱用来降低EMI.Si52258/54具有内部终端的8/4输出,和PCIe Gen 1/2/3/4/5兼容,汽车级2工作温度–40 到 +105℃,内部100 Ω 或85 Ω电阻线路匹配,具有极好的抖动性能: Gen3/4为0.05 ps RMS, Gen5为0.025 ps RMS.三角扩展频谱用来降低EMI,可低至0.25%或0.5%,单独硬件控制引脚用来输出使能,扩展频谱使能,25MHz晶振输入或时钟输入,工作电压1.8V-3.3V,无铅RoHS-6兼容.主要用在信息娱乐设备, ADAS ECU,雷达传感器和激光雷达(LiDar)传感器.本文介绍了Si52258主要特性和特性列表,框图以及评估板Si52258-EVB主要特性,功能框图和主要特性,电路图,材料清单和PCB设计图.

The Si52258/54 are the industry’s highest performance and lowest power automotive grade PCI Express clock generators for PCIe Gen1/2/3/4/5 common clock and/or SRIS applications. The Si52258 and Si52254 source eight and four 100 MHz PCIe differential clock outputs, respectively. All clock outputs are compliant to PCIe Gen1/2/3/4/5 common clock and separate reference clock architecture specifications.

Hardware control pins are available for enabling and disabling the outputs, as well as spread spectrum enable/disable for EMI reduction.
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