USB high-speed PCB track length matching

[gil_he]

hello,

According to AN5031 document by ST (Getting started with STM32MP151, STM32MP153
and STM32MP157 line hardware development), page 69:
“Each package has been optimized to provide easier length matching when differential balls
pair signals are not directly on adjacent balls.”.

Same situation takes place in the OSD32MP153C-512M-BAA.
Is there an internal package length difference I can take into consideration while routing USB_DP2 and USB_DM2?

thanks
Gil

[Neeraj Dantu]

Gil,

Please see requested information below:
USB1
USB1_N 15379.511 559.346
USB1_P 14820.165

USB2
USB2_N 18453.704 572.107
USB2_P 17881.597
Note that all lengths are in microns.

Best,

Neeraj

[gil_he]

hello Neeraj,

I am sorry, but I do not understand your answer.
What do the numbers represent?
USB2_N has two numbers. USB2_P has one number.

I need the routing length difference, inside the SIP package, between USB_DM2 and USB_DP2.

thank you
Gil

[Greg Sheridan]

Hello Gil,
Please see this post that covers your question.

Thanks,
Greg

• This reply was modified 2 years, 8 months ago by Greg Sheridan.

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