Well nothing can ever be too perfect. Ran into a little snag today as the PC Boards
were being loaded with the SMT devices. The two serial EEPROMs, U1000 and U1001, did not fit the footprint
on the board. The spacing of the pads were too narrow. It turns out that when I was looking for the PCB
symbols I looked at the Catalyst data sheet for the
CAT25C256K devices I saw that they were 8-SOIC (eiaj) packages. I didn't pick up on the significance of that (eiaj)
portion of the definition. All the other data sheets I was dealing with (about two reams worth) always gave the
dimensions of the component or clearly stated that their SOIC part wasn't a standard package. So the footprint I
choose was for a 4mm part and not a 5.4mm wide component.
So to fix it I soldered one side (pins 1 thru 4) of the IC to the pads directly. This of coarse
pushed the other side over there pads. Pin 8 I had to jumper over the top to Pin 4. Pin 7 made it to short
trace segments that luckily went straight out. Pin 6 on U1000 made it to a trace also. Pin 6 on U1001
wasn't so lucky. The trace and via from the pad ended up under Pin 5 so I had to bend U1001-5 slightly upwards to
clear the via. Pin 5 of both ICs took a small jumper to the large trace below them.
Hopefully I have paid my dues to the 'goof-up gods' and don't find any more of these little
issues. At least at this point in time all the SMT parts are load on our two panels.