jjonas Posted June 7, 2012 Report Share Posted June 7, 2012 Hi, I'm making a MIDI thru box as per this schematic: http://highlyliquid.com/support/library/midi-thru-circuit/MIDI-Thru-5x.png It uses the 74AC14PC hex inverter. What I could find with my local supplier, however, was only a 74AC14E, so I got that one just to try, but I now think these two are different products. However I'm not sure, and would like someone to confirm how it is. 74AC14E datasheet is here: http://www.alldatasheet.com/datasheet-pdf/pdf/26972/TI/CD74AC14E.html 74AC14PC datasheet is here: http://www.datasheetcatalog.com/datasheets_pdf/7/4/A/C/74AC14PC.shtml It would appear that the leg order of their inputs and outputs match, but their H and L (high and low..?) are reversed. Can someone confirm that the reversed H and L means that they're functionally different? And that it's no use trying to look for mistakes in my preliminary breadboard connections, because the problem is that I don't have the proper hex inverter. Quote Link to comment Share on other sites More sharing options...
Janis1279 Posted June 7, 2012 Report Share Posted June 7, 2012 Hi, The function tables are look identical both, too. The each inverter Output logic level is inverted versus to its Input logic level: H goes to L and L goes to H. Regards, Janis Quote Link to comment Share on other sites More sharing options...
TK. Posted June 7, 2012 Report Share Posted June 7, 2012 Just two different datasheets from two different companies, therefore H/L are listed in a different order but this can be ignored. The function should be identical Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
jjonas Posted June 8, 2012 Author Report Share Posted June 8, 2012 (edited) Thanks for your answers! :-) Edited June 8, 2012 by jjonas Quote Link to comment Share on other sites More sharing options...
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