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DS90UB933-Q1: LVCMOS GROUP LENGTH MATCHING

Avi Amitai
Prodigy 160 points
Part Number: DS90UB933-Q1


Hi 

We are using in our design both DS90UB933/934-Q1  , And in the datasheet's there is no mention to the DIN /DOUT LVCMOS length matching only to the spacing  between the traces ,also the design rules are for differential traces , 

Is there any design rules for the LVCMOS DIN/DOUT from both 933/934 chipsets?

regards,


Avi

  • 0
    TI__Guru** 108870 points
    Hi Avi,

    are you using STP or Coax?
    if STP then you must have differential pair, but if Coax then just a 50 ohm single ended trace.
    On the parallel interface side, there are no requirement that all traces have exactly the same length, but +/- 10% length deviation shall be okay.