
Doppel-1
jgw4/doppel-1
Great care has been taken to create a custom library of footprints that match the original apple-1. In fact, every symbol on the board is custom.
Texas InstrumentsExtended
0℃~+70℃ 15ns@5V,15pF 4.75V~5.25V 74S Output enable high-impedance、Tri-state output Single Supply CDIP-16 Signal Switches, Multiplexers, Decoders
The 74S257DC is a signal Switches, Multiplexers, Decoder made by Texas Instruments in a CDIP-16 package with 5 pins. 0℃~+70℃ 15ns@5V,15pF 4.75V~5.25V 74S Output enable high-impedance、Tri-state output Single Supply CDIP-16 Signal Switches, Multiplexers, Decoders.
JLCPCB lists it (part C3210170). 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.

jgw4/doppel-1
Great care has been taken to create a custom library of footprints that match the original apple-1. In fact, every symbol on the board is custom.
CDIP-16, with 5 pins.
Texas Instruments publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C3210170, 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.