[SI-LIST] Re: Reg reference plane for the same track.
- From: "Suresh Kumar - ERS, HCL Tech" <suresh.kumar@xxxxxxx>
- To: "si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
- Date: Tue, 19 Apr 2011 15:11:55 +0530
Hi Vijay,
It also depends on the rise time of the concerned signal.
Suresh
On 4/19/2011 1:30 AM, vijayanand ganesan wrote:
> Hi All,
> I have a basic doubt while routing my board. Following is the layer stackup
> what I am using.
> 1 ________________Signal
> 2 ________________Gnd.
> 3 ________________Signal
> 4 ________________Signal
> 5
> ________________Pwr.
>
> 6 ________________Gnd.
> 7 ________________Signal
> 8 ________________Signal
> 9 _______________ Pwr.
> 10________________Signal
>
>
> My question is I am trying to maintain the same reference plane for routing
> track, For example I am starting a clock trace from top layer then switching
> to Signal layer 3 (GND ref) and then to Signal layer 7 ( GND ref). I am
> assuming this should be ok since it is having same GND as reference for the
> entire track. Is it advisable to have such practice to cross the layer
> pairs ? If I have a continuous plane Layer 5 (PWR) can I switch between
> signal layer 3 (GND ref ) and Signal layer 5 ( PWR Ref) for the same track.
> Any difference in these two type of switching in signal integrity
> perspective. Kindly share your feedbacks.
> Thank you,
> Vijay
>
>
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