Hacking footprints for easier 2 layer routing
Routing complex surface mount circuits on a 1 or 2 layer PCB is tricky. TSSOP and similar small parts often don’t have enough clearance to route a trace between two leads. Mats tackled this by by removing a few unused leads. This gave him the freedom to route traces through the now available space where the pins used to be. This is certainly never something to do on a production board, but it might save the day for 1 and 2 layer hobby PCBs, especially homemade PCBs.
Here I didn’t need the Q3 and Q4 outputs on a latch so I shrunk down the size of the pads to minimum size and then removed the stop mask on them so they are covered. This makes it easy for me to route a wire between the other pads – something that can’t be done on a TSSOP package since the pads are too close together to fit a normal wire between them.
Via the forum.This entry was posted in hacks, PCBs and tagged footprint, hack, layout.