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Reference Plane For DDR3 interface

Question asked by parth.sutariya on May 1, 2017
Latest reply on May 2, 2017 by vinayarora

Hello All ,

 

I am working on a 6 layered impedance controlled board having DDR3 interface.

 

I have a query related to reference place for impedance matching for DDR3 signal .

 

Is it compulsory to provide DGND reference plane to all data / address signals ?

 

Can I provide VCC reference plane for impedance matching to some of the data / address signals routed in 4th & 6th layer ?

 

Please find the below stackup taken into consideration in our design .

 

Layer 1 - TOP

Layer 2 - DGND

Layer 3 - Signal

Layer 4 - Signal

Layer 5 - VCC

Layer 6 - Bottom

 

Best Regards ,

Parth Sutariya
Hardware CAD Engineer
MATRIX COMSEC PVT. LTD.

R&D Center

 

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Vadodara-390010, Gujarat-INDIA

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