Max trace length for data/address/command signals

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Max trace length for data/address/command signals

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miha_at_work
Contributor III

Hello.

I have a question about DDR4 routing.

In AN5097 specified that max lead-in trace length for data/address/command signals must me no longer than 7 inches (clause 22, page 4). It is specified just for motherboard only or it is summ of data/address/command traces lengts on motherboard and on UDIMM module?

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r8070z
NXP Employee
NXP Employee


Have a great day,

"lead-in trace" is a trace between the memory controller and the clustered DIMMs. They mean length from the DDR controller to DIMM connector where traces have the same length.

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633 Views
r8070z
NXP Employee
NXP Employee


Have a great day,

"lead-in trace" is a trace between the memory controller and the clustered DIMMs. They mean length from the DDR controller to DIMM connector where traces have the same length.

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!

- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
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