External Memory Interface Handbook Volume 2: Design Guidelines

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ID 683385
Date 5/08/2017
Public
Document Table of Contents

2.7.4. Spacing Guidelines

This topic provides recommendations for minimum spacing between board traces for various signal traces.

Spacing Guidelines for DQ, DQS, and DM Traces

Maintain a minimum of 3H spacing between the edges (air-gap) of these traces. (Where H is the vertical distance to the closest return path for that particular trace.)

Spacing Guidelines for Address and Command and Control Traces

Maintain at least 3H spacing between the edges (air-gap) of these traces. (Where H is the vertical distance to the closest return path for that particular trace.)



Spacing Guidelines for Clock Traces

Maintain at least 5H spacing between two clock pair or a clock pair and any other memory interface trace. (Where H is the vertical distance to the closest return path for that particular trace.)



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