If you need more than 3.0 Amps or 5.0 Volts, take a close look at the current and voltage ratings. Current and Voltage Rating - Gone are the days you can rely on USB connectors supporting the current and voltage you expect.Beware that usually the thru-hole pins are designed for 0.6-1.0 mm thick PCBs. The hybrid connectors have a outer row of SMT pads and an inner row of thru-hole pins. Dual-SMT or Hybrid - Some connectors have two rows of 12 SMT pads each.Be sure to have a plan to mechanically support the vertical mount connector. Right-angle vs Vertical Mount - Fairly self-explanatory.USB3.1 supports up to 10 Gbps, USB3.0 would be 5 Gbps, and USB2.0 is 480 Mbps on the DP/DM pins. USB2.0 vs USB3.0 vs USB3.1 - Usually Type-C connectors are rated for a max data rate.Also be careful powering anything from VCONN.Consider making anything connected to VBUS or CC over-Volt tolerant. Benson Leung has had a few incidents in his famous Amazon reviews. Make sure this doesn't violate voltage ratings in your circuits. With USB Power Delivery 2.0, VBUS can go up to 20V. Be careful powering anything off of VBUS.Cables that only support USB2.0 do not need to be marked. "All USB Full-Featured Type-C cables shall be electronically marked." (section 4.9). It is responsible for reporting the capabilities of the cable. This means there is a microcontroller inside one of the plugs, connected to the CC line. If you are using an alternate mode, make sure it can handle 90 Ohm +/- 5 Ohm (section 3.7.1) The differential pairs will have a 90 Ohm differential impedance.Similarly, SBU1 is connected to SBU2 on the other side. That means that SSTX1 on one side is connected to SSRX1 on the other side. The SuperSpeed Tx and Rx lines swap in the cable.
0 kommentar(er)
