
UBITz Host z80-Host
dumaiss/uBITz
**μBITz** – *ZAP 80s dreams into silicon.* Open modular 8-bit system: dock Z80/6502, tile SID/POKEY, boot in '83. M.2 LVDS serial, I²C map, Parity-10, ZAP IRQs. Spec + KiCad + Verilog + ref impl. Build. ZAP.
The SN74LS612N is an i, O Expander made by Texas Instruments with 40 pins. 0℃~+70℃ 12 4.75V~5.25V No Interrupt Output - I/O Expanders.
PCBKit's library has its KiCad symbol (EasyEDA_Cloud:SN74LS612N, from EasyEDA) and its footprint (EasyEDA_Cloud:PDIP-40_L52.3-W13.8-P2.54-LS15.2-BL, from EasyEDA), ready for a KiCad board. JLCPCB lists it (part C3170343). 1 open-source board in 1 repository on GitHub use it.
| Pin | Name | Type |
|---|---|---|
| 1 | RS2 | Unspecified |
| 2 | MA3 | Unspecified |
| 3 | RS3 | Unspecified |
| 4 | CS# | Unspecified |
| 5 | STORBE# | Unspecified |
| 6 | R/W# | Unspecified |
| 7 | D0 | Unspecified |
| 8 | D1 | Unspecified |
| 9 | D2 | Unspecified |
| 10 | D3 | Unspecified |
| 11 | D4 | Unspecified |
| 12 | D5 | Unspecified |
| 13 | MM# | Unspecified |
| 14 | MO0 | Unspecified |
| 15 | MO1 | Unspecified |
| 16 | MO2 | Unspecified |
| 17 | MO3 | Unspecified |
| 18 | MO4 | Unspecified |
| 19 | MO5 | Unspecified |
| 20 | GND | Unspecified |
| 21 | ME# | Unspecified |
| 22 | MO6 | Unspecified |
| 23 | MO7 | Unspecified |
| 24 | MO8 | Unspecified |
| 25 | MO9 | Unspecified |
| 26 | MO10 | Unspecified |
| 27 | MO11 | Unspecified |
| 28 | C(NC) | Unspecified |
| 29 | D6 | Unspecified |
| 30 | D7 | Unspecified |
| 31 | D8 | Unspecified |
| 32 | D9 | Unspecified |
| 33 | D10 | Unspecified |
| 34 | D11 | Unspecified |
| 35 | MA0 | Unspecified |
| 36 | RSO | Unspecified |
| 37 | MA1 | Unspecified |
| 38 | RS1 | Unspecified |
| 39 | MA2 | Unspecified |
| 40 | VCC | Unspecified |

dumaiss/uBITz
**μBITz** – *ZAP 80s dreams into silicon.* Open modular 8-bit system: dock Z80/6502, tile SID/POKEY, boot in '83. M.2 LVDS serial, I²C map, Parity-10, ZAP IRQs. Spec + KiCad + Verilog + ref impl. Build. ZAP.
<iframe src="https://pcbkit.io/embed/parts/ti/SN74LS612N" title="SN74LS612N 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/SN74LS612N.jpg" alt="SN74LS612N" width="1200" height="900">[](https://pcbkit.io/parts/ti/SN74LS612N)Yes. The symbol is EasyEDA_Cloud:SN74LS612N and the footprint EasyEDA_Cloud:PDIP-40_L52.3-W13.8-P2.54-LS15.2-BL, both drawn on this page. PCBKit places them on a board for you when you design with it.
Texas Instruments publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C3170343, with 0 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the SN74LS610N by Texas Instruments. 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.