The 74LS55SC is a logic Gate made by Texas Instruments with 5 pins. 0℃~+70℃ 15ns 2.4V 20mA 4 4.75V~5.25V 400mV 500uA - Logic Gates.
JLCPCB lists it (part C4469732). 1 open-source board in 1 repository on GitHub use it.
The library has no symbol for this part yet.
The library has no footprint for this part yet.
schenkmi/electronic-retro-computing-projects
In revision 2, the PCB size has been reduced by more than 50% and TAPuino support has been ditched. It now features a Micro SD slot and a few other improvements.
Texas Instruments publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C4469732, with 0 in stock; the sellers' links on this page open their listings.
1 board in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.