I've created a dozen or so through hole boards with Eagle (mostly Arduino shields), but I need to create a surface mount board. The DAC I need to use is a TSSOP 38 package (AD5348).
I created a custom library following an online tutorial for the DAC and copied the TSSOP 38 package for a different existing library.
I laid out the board (with the DAC and some op-amps) but the auto route couldnt get past about 75%.
I played for a while, but couldn’t get any further. So, I thought I'd test the part with a simple breakout board. I created a board with just the TSSOP 38 device, fanned out to 0.1" headers.
However, to my surprise, the auto route failed to route this simple board as well. See below. Why would the auto route not be able to fan out this simple board ?
What am I doing wrong ? Or am I expecting too much ?
I'm using the free version of Eagle v6.3.0 with a two layer board.