falter
Veteran Member
A question that arose as I have been fixing things I broke -- I am assuming over the course of time many same-design products have been made over the years in the IC department and that there might be equivalents to and earlier type in a later form. I'm wondering if that's true and if so, how you go about most easily determining compatibility?
For example, on my Rev I Apple II keyboard, I need possibly another 7400, which I did order. However, in doing some reading it would appear that 74LS00 might also be suitable as a replacement, the LS having something to do with the power requirements, which on reading appear to be the same as the original 7400. Can I assume, for example, that a 74LS02 is equivalent to an older 7402 and so on? How do you know?
For example, on my Rev I Apple II keyboard, I need possibly another 7400, which I did order. However, in doing some reading it would appear that 74LS00 might also be suitable as a replacement, the LS having something to do with the power requirements, which on reading appear to be the same as the original 7400. Can I assume, for example, that a 74LS02 is equivalent to an older 7402 and so on? How do you know?