19 open source boards using the 74LS139
Real designs built with the 74LS139, 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.
Multi
homebrew8088
243.8 × 172.7 mm85 parts2LGPL-3.0238
C64-250407-Replica
bwack
390 × 179.8 mm214 parts2LCERN-OHL-1.2114
Dragon64
danwerner21
333.2 × 205.9 mm220 parts2LNo license34
Tandy-Color-Computer-Multi-Pak
djtersteegc
203.4 × 139.1 mm62 parts2LMIT16
RC200-Dev Backplane
MarkD833
188 × 102.9 mm90 parts2LCC-BY-NC-4.08
V40 64K 640K ISA
145.8 × 91.4 mm23 parts2LGPL-3.0238
Backup
333.2 × 205.9 mm218 parts2LNo license34
Backup1
333.2 × 205.9 mm218 parts2LNo license34
68302 CPU Board
101.6 × 53.3 mm37 parts4LCC-BY-NC-4.08
RC201-68000 CPU 2
101.6 × 53.3 mm37 parts4LCC-BY-NC-4.08
Z80PRINT
lynchaj
100 × 100 mm66 parts2LNo license31
Z80PSG1
100 × 100 mm64 parts2LNo license31
68000 CPU Board
101.6 × 53.3 mm32 parts4LCC-BY-NC-4.08
DMA
132 × 73.9 mm13 parts2LGPL-3.0238
RC107-68000 ROM RAM 1
101.6 × 53.3 mm28 parts4LCC-BY-NC-4.08
AVR/ArduinoZ80DMA2
100 × 100 mm59 parts2LNo license31
64K 640K ISA
104 × 73.9 mm12 parts2LGPL-3.0238
512k
104 × 73.9 mm10 parts2LGPL-3.0238
RC208-68000 BOOTROM RAM 2
101.6 × 53.3 mm20 parts4LCC-BY-NC-4.08
The 74LS139 in open source designs
The gallery holds 19 open source boards using the 74LS139 from 6 GitHub repositories; a typical one measures about 104 × 100 mm and carries around 59 components.
74% are two-layer designs, the rest use four layers or more, and 37% carry an open source license.
The most starred is Multi by homebrew8088.
Parts used alongside the 74LS139
Microcontrollers on boards using the 74LS139
What boards using the 74LS139 are built for
74LS139: common questions
Where can I find a 74LS139 reference design?
Each of the 19 boards on this page is a real design using the 74LS139. 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 74LS139?
The 74LS04, 74LS138, 74LS245, 74LS74 and 74LS00 appear in the most repositories here.
Which microcontrollers do boards using the 74LS139 use?
Most are built on AVR/Arduino (1).
How big is a typical board using the 74LS139?
The median is 104 × 100 mm, and 74% are two-layer designs.
What is the most popular open source board using the 74LS139?
By GitHub stars, Multi by homebrew8088, with 238 stars.
Can I simulate one of these boards using the 74LS139 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.