
Open8-vga motherboard
adham404/Open8-VGA
An 8-bit computer from 74HC logic: microcoded CPU, VGA, PS/2, on-board editor and assembler. Play it in your browser.

The CD74AC138E is a signal Switches, Multiplexers, Decoder made by Texas Instruments in a PDIP-16 package with 16 pins. -55℃~+125℃ 1.5V~5.5V 11ns@5V,50pF 160uA 24mA 24mA 74AC Decoder Single Supply PDIP-16 Signal Switches, Multiplexers, Decoders ROHS.
PCBKit's library has its KiCad symbol (74xx:74HC138, from KiCad's library) and its footprint (Package_DIP:DIP-16_W8.89mm_SMDSocket_LongPads, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C1547104). 1 open-source board in 1 repository on GitHub use it.
| Pin | Name | Type |
|---|---|---|
| 1 | A0 | Input |
| 2 | A1 | Input |
| 3 | A2 | Input |
| 4 | E0 | Input |
| 5 | E1 | Input |
| 6 | E2 | Input |
| 7 | Y7 | Output |
| 8 | GND | Power in |
| 9 | Y6 | Output |
| 10 | Y5 | Output |
| 11 | Y4 | Output |
| 12 | Y3 | Output |
| 13 | Y2 | Output |
| 14 | Y1 | Output |
| 15 | Y0 | Output |
| 16 | VCC | Power in |

adham404/Open8-VGA
An 8-bit computer from 74HC logic: microcoded CPU, VGA, PS/2, on-board editor and assembler. Play it in your browser.
<iframe src="https://pcbkit.io/embed/parts/ti/CD74AC138E" title="CD74AC138E in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/ti/CD74AC138E.jpg" alt="CD74AC138E" width="1200" height="900">[](https://pcbkit.io/parts/ti/CD74AC138E)Yes. The symbol is 74xx:74HC138 and the footprint Package_DIP:DIP-16_W8.89mm_SMDSocket_LongPads, both drawn on this page. PCBKit places them on a board for you when you design with it.
PDIP-16, with 16 pins. Its footprint is drawn on this page.
Texas Instruments publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C1547104, with 0 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the SN74HC138NED-GMIC by GREENMICRO, the 74HC138N by HGSEMI, the 74HC139N by HGSEMI and the 74HC238N by HGSEMI. Check their datasheets: a part that fits the footprint may still differ in its ratings.
1 board in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.