2 open source boards using the PCA9545A
Real designs built with the PCA9545A, 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.
STM32LumenPnP Motherboard
opulo-inc
149 × 95 mm296 parts4LCC-BY-SA-4.03.7k
Pinpoint core
lab11
58.4 × 50 mm111 parts2LApache-2.0144
The PCA9545A in open source designs
The gallery holds 2 open source boards using the PCA9545A from 2 GitHub repositories; a typical one measures about 103.7 × 72.5 mm and carries around 204 components.
50% are two-layer designs, the rest use four layers or more, and 100% carry an open source license.
The most starred is LumenPnP Motherboard by opulo-inc.
Microcontrollers on boards using the PCA9545A
What boards using the PCA9545A are built for
PCA9545A: common questions
Where can I find a PCA9545A reference design?
Each of the 2 boards on this page is a real design using the PCA9545A. Open one to see how it is wired up, with the full BOM, a render of the layout and links to its KiCad files.
Which microcontrollers do boards using the PCA9545A use?
Most are built on STM32 (1).
How big is a typical board using the PCA9545A?
The median is 103.7 × 72.5 mm, and 50% are two-layer designs.
What is the most popular open source board using the PCA9545A?
By GitHub stars, LumenPnP Motherboard by opulo-inc, with 3,655 stars.
Can I simulate one of these boards using the PCA9545A 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.