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66AK2L06: DDR3 routing

Sreejaya Varma
Intellectual 430 points
Part Number: 66AK2L06

Is it possible to neck down the trace width of address, control and data lines of DDR3, since there are some space constraints on our PCB? The neck length is 25 - 80 mils.

This is expected only for some of the address lines and data lines.

Thanks,

Sreejaya

  • 0
    TI__Guru 65405 points
    I've forwarded your query to the hardware design experts. Their feedback should be posted here.

    BR
    Tsvetolin Shulev
  • 0
    TI__Mastermind 42545 points

    Hi Sreejaya,

    Necking down the trace will cause a discontinuity in the impedance and degrade the signal quality. The routing guideline provided by TI have been used successfully by customers to generate an error free memory interface. If you don't follow the guidelines we can't predict how your system will operate. Necking down should not be necessary to escape the DDR signals from the K2L.

    Regards, Bill