I always get very fast and good answer from this forum, thanks to all good and experienced guys, I have a simple question again.
I know most of the time we ask PCB fab shop to put a 4 digit date code on the board, for example xxyy, xx is year, and yy is week of the year. is it doable( commen practice) to ask PCB fab shop to put 5 digit date code. like xxyyz, I want use z to represent a revison of internal code.
is date code limited to 4 digit. will it make some trouble to the fab shop?