SLLA500 December   2020 TUSB2E22

 

  1.   Trademarks
  2. 1Introduction to the Embedded USB2 (eUSB2) Physical Layer Supplement
  3. 2eUSB2 Electrical Specifications
  4. 3eUSB2 Trace Routing
  5. 4Matched Trace Length and Skew for eUSB2
  6. 5PCB Stackup for eUSB2 Applications
  7. 6Environmental Concerns and eUSB2
  8. 7References

6 Environmental Concerns and eUSB2

Since eUSB2 is intended as an interchip protocol, ESD (Electrostatic Discharge) protection devices are not recommended on the eUSB2 lines since no exposed connections are expected. eUSB2 repeaters and eUSB2 SoCs should have integrated ESD protections sufficient for most designs. Likewise, EMI (Electromagnetic Interference) protection devices such as common-mode chokes and ferrite beads are not recommend on the eUSB2 lines since they will negatively impact signal quality on the low voltage signal.

For EMC (Electromagnetic Compatibility), ferrite beads can be used to isolate the power to the eUSB2 devices and eUSB2 repeaters and any cable shields terminated to ground should include a capacitor option to decouple the chassis or cable ground and signal ground.