Hi, I see that in the description for the package footprints, they talk about the grid, what does it signify? e.g. : "Small outline integrated circuit. Grid: 150 mils"
Another quick question: is there a difference between SO and SOIC? e.g. : SO-16 & SOIC-16?
Thanks
Hi. I'm not entirely sure but I think so-16 can be thought as short hand for soic-16? and the grid 150 mil's has something to do with the grid setting on your pcb design software.
Hi,
Re: SO vs SOIC, have a look at: http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=89543&view=previous
Re: Grid 150mil. I confirm RoboWanabe's thinking. The grid is most likely to be the distance between the x-axis & y-axis position markers on the screen (denoted by either dots or a mesh). Its a measure of the magnification of the view of the PCB tracks, pads etc.