pcie impedence for pcb layout!

[BVJ2Vs]

Hi,

I am designing a PCB layout for imx6q (SMARC Standard) based carrier board. When we refer the freescale pcb guidelines the impedance for PCIe signals is to be 85 ohms, but in some other docs it stated as 100 ohms. So we are bit confused in the layout design regarding the impedance value Could you please provide the exact impedance value to be used for PCIe signals in our layout impedance value.

[igorpadykov · Accepted solution]

Hi Berlin

please follow freescale pcb guidelines for impedance PCIe signals to be 85 ohms

Best regards
igor
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