Are these two inverters functionally different?

Miscellaneous
1

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.

2

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

3

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.

4

Thanks for your answers! :slight_smile: