DP83848J: Recommended Maximum Trace Length from PHY to RJ45

Allen Lu

Intellectual 1930 points

Part Number: DP83848J

hi team:

my customer use DP83848 PHY, but they has some limitation of the PCB layout ,so they want to confirm the maximum trace length from the PHY to RJ45 side.

meanwhile , the MAC to PHY is recommendation under 2 inches after checking from the spec.

over 2 years ago

0 Allen Lu over 2 years ago

TI__Intellectual 1930 points

add some application note:

Customers use this PHY only for debug functions, they will send some 100Mb sized packets for some updates.

+1 Alon Kopelman over 2 years ago in reply to Allen Lu

TI__Expert 3725 points

Hi Allen,

Please see the answer in the following E2E post. Glad I could help

https://e2e.ti.com/support/interface-group/interface/f/interface-forum/982604/dp83848i-max-trace-length-bwtween-phy-and-ethernet-jack

Best,

Alon

Interface

Interface forum

DP83848J: Recommended Maximum Trace Length from PHY to RJ45