Isolation in DDR

[jebin]

Hi,
What is the meaning of "Isolation : DQ/CA/DM/CS/CK/DQS to any aggressor : -40 dB" and how to implement in Layout?.

Jebin

[robertferanec]

This can help (there are numbers also in dB): https://youtu.be/bzDheVwJZDM?t=1077

[jebin]

Hi Robert,
Thanks for replay, You have explained nicely Thanks a Lot.

What is meaning of "Tandem Layer clearance: >0.5xW" ?

Jebin

[robertferanec]

Where exactly it is used?

[jebin]

Hi Robert,
Its used in LPDDR Routing. Guidelines enclosed for your reference.

Jebin

[jebin]

Actually DDR2

Jebin

[robertferanec]

I believe, they mean when the tracks are routed in paralel on neighbor layers (on the top of each other).

[jebin]

Hi Robert,

Thanks.