6 open source boards using the 74LS540
Real designs built with the 74LS540, 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.
TD4 imem
akita11
100 × 100 mm157 parts2LMIT1
SPI Unit
oberrow
96 × 70 mm29 parts4LMIT1
UART Unit
63.8 × 77.6 mm13 parts2LMIT1
Timer Unit
58 × 47 mm12 parts2LMIT1
82C55 GPIO Unit
52 × 72 mm11 parts4LMIT1
GIMIX intelligent 3 port Serial
roberto314
149.9 × 139.7 mm69 parts2LBSD-2-Clause1
The 74LS540 in open source designs
The gallery holds 6 open source boards using the 74LS540 from 3 GitHub repositories; a typical one measures about 79.9 × 74.8 mm and carries around 21 components.
67% are two-layer designs, the rest use four layers or more, and 100% carry an open source license.
The most starred is TD4 imem by akita11.
Parts used alongside the 74LS540
What boards using the 74LS540 are built for
74LS540: common questions
Where can I find a 74LS540 reference design?
Each of the 6 boards on this page is a real design using the 74LS540. Open one to see how it is wired up, with the full BOM, a render of the layout and links to its KiCad files.
How big is a typical board using the 74LS540?
The median is 79.9 × 74.8 mm, and 67% are two-layer designs.
What is the most popular open source board using the 74LS540?
By GitHub stars, TD4 imem by akita11, with 1 stars.
Can I simulate one of these boards using the 74LS540 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.