TXV0106-Q1: RGMII trace length

Ben Kuo

Expert 7475 points

Part Number: TXV0106-Q1
Other Parts Discussed in Thread: TXV0106

Hi Team,

We are designing TXV0106 in RGMII and want to double check if this device can support 150mm trace length.

We know there are some parameter will impact the result, but in general, does our device can support this application?

Regards,

Ben

8 months ago

0 Michael Ikwuyum 8 months ago

TI__Mastermind 33765 points

Hi Ben,

Yes, the device will function in general but will recommend ensuring timing parameters are not compromised as additional trace length adds additional capacitance, thanks.

Best Regards,

Michael.

0 Ben Kuo 8 months ago in reply to Michael Ikwuyum

TI__Expert 7475 points

Hi Michael,

So the trace length should not an issue. But additional pin cap need to double check timing parameter.

Another question here is, how long of trace length our device can support in general?

Regards,

Ben

+1 Michael Ikwuyum 8 months ago in reply to Ben Kuo

TI__Mastermind 33765 points

Hi Ben,

Device will work. However, my feedback was for any timing requirement i.e. the shorter the trace, the lower the lumped capacitive loading for optimized timing / signal integrity. I further estimated 150 mm for 1 ns transmission line delay. Please see below performance with and without series resistor.

Please also see [FAQ] What is the maximum trace length that a logic device can drive? for more information on general logic devices. However, further note that TXV is a faster device being able to handle more, thanks.

Best Regards,

Michael.

Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

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TXV0106-Q1: RGMII trace length