The Great Search - Small 2, 3 and 4-Port USB Hub Chips

The Great Search - Small 2, 3 and 4-Port USB Hub Chips
www.digikey.co...
We recently did a design for a simple 4-port USB hub - but we wanted to also show off some nicer hub chips available! Hub chips are available in 2, 3 and 4 port designs, and can be configured with LEDs, custom USB descriptors, and over-current detection. These could be useful when you have a product with more than one USB-interface chip (say one for native, one for debug USB) so that instead of two confusing USB ports you can have one interface with both devices exposed! Or, if you are designing a board with embedded linux, you can take advantage of the built in hub support to have multiple USB ports. There's also some interesting integrated hub chips like the LAN9513 www.digikey.co... which has an Ethernet chip built in.
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[@ihabawad]

Thank you Ladyada! I just threw together a design and was totally puzzled regarding which hub chip to choose. Ironically, I independently chose the USB2412, but I was worried that I'd somehow made a huge mistake!

[@c1ph3rpunk]

Is parts availability getting any better these days?

[@EvilDaveCanada]

I'm building a custom layout mechanical keyboard (for a Peek & Poke typist, no touch typing possible) and I want a USB 3.0 hub inside so I can connect a minimum of five(5) additional input devices through it.
I originally thought of just buying an seven(7) port externally powered USB 3.0 hub and then pull it's circuit board and hard wiring it's port selector witches closed.
I would then power the hub by adding by using a Y type of cable and a phone charger right at the computer's Host Port.
The BIG problem that I have found out the hard way is that I need to use diodes to prevent this external power from backflowing into the host port.
I have found that a lot of motherboards DO NOT have this port protection as I supply enough amps to the hub so that each of its data ports get the full amperage allowed by the USB specifications,
This backflow has happened on a few different motherboards made by different top manufacturers such as ASUS, Gigabyte, etc, and neither the PCIe version or Intel/AMD CPU type makes a difference.
It can play with your mind when you turn off the power supply and the internal fans and their LEDs DO NOT turn off and this includes the CPU's fan and it's LEDs !!!!!
This backflow is going all the way through the PCIe bus and power them and who else what.

[@blackmennewstyle]

Happy midweek guys 🔥🚀