11 open source boards using the 74HCT139
Real designs built with the 74HCT139, from public GitHub projects: a quick way to see how others power, decouple and connect it. Each board comes with its KiCad files, full parts list and a render — and you can simulate its firmware on HardLabs.
AVR/Arduino8bit computer
vascofazza
297.2 × 180.3 mm327 parts2LMIT314
LittleSixteen
SukkoPera
389 × 136.2 mm329 parts2LCustom license76
ISA EMS 2Mb
hkzlab
104.1 × 102.9 mm41 parts2LCC-BY-NC-4.023
2FISC
DoctorWkt
214.6 × 123.2 mm73 parts2LGPL-3.010
FISC
231.3 × 96.5 mm59 parts2LGPL-3.07
SST-6809-V2.2
KenWillmott
100 × 100 mm46 parts4LMIT1
AVR/ArduinoZ80ctrl
jblang
99.8 × 49.9 mm30 parts2LMIT73
Genesis advanced flash 1-1
MouseBiteLabs
83.8 × 61 mm42 parts2LCC-BY-SA-4.016
Genesis advanced flash 1-2
83.8 × 61 mm42 parts2LCC-BY-SA-4.016
Z80-IDE
dennis9819
160 × 100.3 mm62 parts2LNo license2
Z80-SID
160 × 100.3 mm62 parts2LNo license2
The 74HCT139 in open source designs
The gallery holds 11 open source boards using the 74HCT139 from 9 GitHub repositories; a typical one measures about 160 × 100.3 mm and carries around 59 components.
91% are two-layer designs, the rest use four layers or more, and 64% carry an open source license.
The most starred is 8bit computer by vascofazza.
Parts used alongside the 74HCT139
Microcontrollers on boards using the 74HCT139
What boards using the 74HCT139 are built for
74HCT139: common questions
Where can I find a 74HCT139 reference design?
Each of the 11 boards on this page is a real design using the 74HCT139. Open one to see how it is wired up, with the full BOM, a render of the layout and links to its KiCad files.
What parts are used alongside the 74HCT139?
The 74HCT04, 74HCT138, 74HCT273, 74HCT02 and 74HCT161 appear in the most repositories here.
Which microcontrollers do boards using the 74HCT139 use?
Most are built on AVR/Arduino (2).
How big is a typical board using the 74HCT139?
The median is 160 × 100.3 mm, and 91% are two-layer designs.
What is the most popular open source board using the 74HCT139?
By GitHub stars, 8bit computer by vascofazza, with 314 stars.
Can I simulate one of these boards using the 74HCT139 before building it?
Yes. HardLabs turns a board's netlist and BOM into a working simulation, so you can boot and test firmware against it with no hardware on your desk.