TUSB8041A: the max cable length before the hub and after the hub

max PCB trace length is 8in, max USB3 cable length is 3m.

Thanks for your answers. How about the length before the chip? Do we have some details about the internal adaptive EQ? We want to get the advantages of the spec, whether it’s only good when using the aging cable? whether it can be compatible with USB2.0 without changing anything?Thanks.

HI Frank,

We recommend a max of 8 inches of PCB traces before or after the hub, longer PCB trace length is possible but care must be taken to match trace length and control impedance.  Max USB 2.0 cable length is 5M.

Regards,

JMMN

Hi JMMM,

The max PCB trace length 8in, max USB3 cable length  3m are before plus the after the hub? whether it has some guideline where we put the hub, or just based on the power loss, if before loss is larger, we put near the source side, otherwise we will put near the end point side, correct? So our device cannot be changed the EQ manually. Thanks.

Hi JMMN,

other team member recommends to use the TUSB8042A to replace TUSB8041. Whether the EQ and cable capability of 8042A is the same as 8041? Thanks.