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Struggling to find a PCIe USB controller IC. Either unavailable or expensive (discuss.tchncs.de)

submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]

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I want to use an IC that will take x4 3.0 PCIe lanes, and adds a USB 3.1 controller.

This ASMedia one looks ideal, but doesn't appear to be available to the common folk: https://www.asmedia.com.tw/product/E0CYQ4fSpaQxdjzA/f32YQ14SmApn1wNA

There's also https://www.ti.com/lit/ds/symlink/tusb7340.pdf - but that costs 22USD with LCSC, as well as being much slower (only using x1 lane)

I'm finding it hard to Google as well, because it seems to bring up complete products rather than ICs.

Can buy a whole card on eBay with the ASM3242 on it!

Can anyone help here please?

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[–] [email protected] 2 points 1 year ago (1 children)

How many do you need

[–] [email protected] 2 points 1 year ago

Sorry, I should have said, just one or two. But even if just one, I need the datasheet.

[–] breadsmasher 2 points 1 year ago (1 children)

The ASMedia one you have linked is x2 anyway.

[–] [email protected] 3 points 1 year ago* (last edited 1 year ago)

Sorry, wrong link https://www.asmedia.com.tw/product/E0CYQ4fSpaQxdjzA/f32YQ14SmApn1wNA

I've updated the original post. In any case, the question still stands - would at least like to find more available options, and understand why the ASMedia ones aren't available.

[–] [email protected] 1 points 1 year ago

How many do you need? If it’s for a prototype, scavenging them from retail hardware isn’t necessarily a bad idea.

[–] tbe 1 points 1 year ago

Maybe this: https://www.microchip.com/en-us/product/PCI11400 Unfortunately to access the whole datasheet you might have to sign an NDA (and probably have a large company), also designing things with those kinds of interfaces isn’t trivial.

Alternatively maybe this: https://www.renesas.com/us/en/products/interface/usb-switches-hubs/upd720202-usb-30-host-controller It also seems to be locked by an NDA.

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