What offerings does TI have for high speed USB hubs?
There seems to be a gap between full-speed and super-speed (USB 3.0).
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Hi Josh
In fact there's a gap but soon we will release HS USB Hubs, 2 & 4 ports.
Currently we have samples for the TUSB4020B (2 port) and in September we will have TUSB4041 (4port) samples.
RTM is still TBD.
Best regards.
JC
Hello,
At the moment we use a TUSB2046B 4 port USB hub on Full speed. We need a High speed Hub. What is the roadmap for the TUSB4041?
And will this device be compatible with TUSB2046BVF 32LQFP
Kind regards,
JW
Hello,
Thank you for your reply.
The reason why I asked this is that in the online datasheet, we can see 100nF capacitors recommendation as here:
Use the layout guidelines listed in this section for proper PCB layout design.
Is just 100nF enough for that TUSB4041 works fine ?
Hello,
I use a TUSB4041I connected to a Computer on Module.
I have an issue with the usb hub which reboots permanently.
From the COM, I can see that the TI driver installed seems to be wrong because it appears TUSB8041, which is USB 3.0 hub and not the USB 2.0, like following:
Bus 002 Device 002: ID 0451:8142 Texas Instruments, Inc. TUSB8041 4-Port Hub
It seems that the generic driver for TUSB4041 is TUSB8041, am I wrong ? Is it a problem ?
Thank you for your help.
Hello,
Thank you for your reply.
I have checked the datasheet of TUSB4041I and TUSB8041; the product ID is the same : 0x0451 0x8140.
With lsusb -v command, we can see that the device ID is 0451:8142 and TUSB8081 is recognized.
We can see that the XORed has been added (0x0002), what does this bit stand for ?
There seems to be no difference between TUSB4041I and TUSB8041I, am I right ?
Thank you for your help.
Hi Matt,
The TUSB4041 and the USB 2.0 hub of the TUSB8041 will report the same PID (8142). The USB 3.0 hub of the TUSB8041 reports a different PID (8140). The TUSB4041 datasheet needs to be updated to reflect that. In either case, if the PID reported is 8142, the hub is a USB 2.0 hub.
Thanks,
JMMN
Hello,
Thank you for your answer.
Ok for your explanation, so everything is normal on this side ; the USB problem I get should come from somewhere else.
I will do other tests and see if there is still a reset problem.
Thanks again for your help.
Hello,
I have another questions regarding USB outputs of hub TUSB4041I.
We often see that on the lines D+ and D-, we have pull-down resistors of 15kohms connected to GND. Are these resistors necessary on these lines ?
Moreover, we often use common mode shock; are these components used everytime on these lines ? Or just when the signals go out from the board ?
Thanks a lot for your help.
Hello,
Thank you very much for your fast answer.
I don't see any data in the datasheet about these internal pull-down resistors. However, I see in the schematics of the evaluation module that they are not implemented.
Regarding USB Host upstream, do you know if these resistors are needed ?
Thank you for your support.