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.
For more information about PCI Express, Silicon Labs’ complete PCIe portfolio, applicationnotes, and design tools, including the Silicon Labs PCIe Clock Jitter Tool for PCI Expresscompliance, please visit the Silicon Labs PCI Express Learning Center.
Si52258主要特性:
• 8/4-outputs with internal termination
• PCIe Gen 1/2/3/4/5 compliant
• Automotive grade 2: –40 to +105℃
• Internal 100 Ω or 85 Ω line matching
• Excellent jitter performance
• 0.05 ps RMS (Gen3/4)
• 0.025 ps RMS (Gen5)
• Triangular spread spectrum for EMIreduction, down spread 0.25% or 0.5%
• Individual hardware control pins for OutputEna...