HD3SS3412A: USB C Custom SFP Alt Mode

4412 should be better choice, insertion loss is -0.9db at 5Ghz or 10Gbps, so total -1.8db loss at 5Ghz for two Mux. How long is the trace  between C connector to USB3.0 connector?

THanks

Brian

pls send schematic as well.

Thanks 

Brian

Length is about 3.5" between C and USB 3 connector. Here are the relevant parts of the schematic. Nothing else touches the SS lanes.

I didn't see any AC cap on SSTX for USB3.

Thanks

Brian

Wouldn't the SS caps be handled on the host/device side? i.e. the DFP that the USB C connector connects to and the device connected to the USB 3 port?

host side  or device side :SSTX side do have AC cap, but SSRX side don't have AC cap

on type-C port, SSTX1/SSTX2 are connected to SSRX of host.

on typs-A port, USB3_TX  is connected to SSRX of device.

so you can not connect host SSRX to device SSRX, you need to connect host SSTX to device SSRX.

Regars

Brian

Bear with me since this quickly becomes spaghetti but I think I implemented as you described. Added Host and Device to my block diagram so help me verify what I've done. And notice in my more detailed schematic that I've switched TX/RX connections to the USB 3 A connector to make this work.

based on this detailed schematic, it should work.

what connector used here, type-C is plug, type--A is receptacle?

Sorry, I could have been more explicit. Both are receptacles. Full featured USB C cable between host and USB C connector, and USB 3 thumb drive is device inserted into USB 3 A receptacle.

let me check again if both receptacles will work.

how long is your cable? it may violate USB 3 loss budget.

Thanks

Brian

I've tested with 0.8m 20Gbps USB C and TBT3 cables. I'm going to try using a TUSB1044RNQEVM to see if that helps. Will report back when I have it in hand and test. 

sure