I have been looking for a 74688 for my project (elektor Logic Analyzer) But have not been able to find any who sells it anymore.
The 74684 is though easily obtainable. The pinout-differens is that of pin one on the 688 has an Enable-input (which is connected to ground for enabeling for ever in this project) and the same pin one on the 684 has an output of no interest for me. Otherwise they look the same - but will they really perform the same way?
I have bought a 684 but then again I get nervouse. Huuuhh. The datasheets can be found (among many other places) on
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Could somebody with more experiens than me please comment. I would then be able to loose that Huuuhh-feeling. Happy easter hollydays!