Unknown netname, netname not changed

Layout Footprints
1

I need to design a PCB board with lvds-lvttl converter ( SN65LVDS048AD), which comes in the package SOIC-16 D. In the EESchema libraries, symbol for SN65LVDS047D is available (which does the reverse job, lvttl-lvds) but not the one which i need.

In pcb-new when I try differential routing on the pads of the chip it shows “Unable to find complementary differential pair nets. Make sure the names of the nets belonging to a differential pair end with either_N/_P or +/-.”
When I tried to change the net name of the pad it shows “Unknown net-name, net name not changed”.

So how to solve these problems.

2

You need to do this in the schematic. Add a label to controll netnames.

2 Likes
3

Thanks, that helped. Now I am able to route differential pair after assigning net name in the “Eeschema” and forwarding it to “pcb-new”

And I decide to use footprint of the lvttl-lvds converter, because it has the same package (I will change the pins only).

4

This topic was automatically closed 90 days after the last reply. New replies are no longer allowed.