Components data sheet can be confusing sometimes
Can anyone explain to me the difference between these counters 74LS196 and 74LS197 ? can they replace each other? can the 74LS197 perform better in the place of 74LS196 in case if they do replace each other? Other thing, I found 74S196 !! so is the LS is different than S version - all these components are discontinued long ago, so any specific replacement with the same pin out ?
thanks in advance