Can anyone help me out here?
I pulled out two corroded SN74LS161 AN chips from an Apple II+. eBay doesn't have any of these up for sale right now, but they DO have SN74LS161 N and DN74LS161 AN chips for sale (from China) - is the D vs S significant here? What about the AN vs N in the chip name?
I also need to replace a corroded DM74LS02 N chip.
What is significant about these chip names / branding that I need to match, and what isn't?
Any help is appreciated!