PCB trace impedance between i.MX8M and LPDDR4

[Allen2017]

Hello, we have a new project use MIMX8MM6DVTLZAA, the PCB trace between MIMX8MM6DVTLZAA and LPDDR4 width/spacing is only 0.08mm due to room limitation, and the calculated impedance is 55 +/- 10% ohm, is this acceptable, how much impact does it have on the performance, thanks in advance.

[nxf63675]

Hi @Allen2017,

Please refer to the hardware developers guide for this, part 3.5. Trace impedance recommendations and 3.4.2. LPDDR4-3000 design recommendations, of course, this last depends on the speed of your DDR device.

https://www.nxp.com/webapp/Download?colCode=IMX8MMHDG

Regards,

Israel.