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2. USB - Wikipedia

   en.wikipedia.org/wiki/USB

   Standard USB hub ports can provide from the typical 500 mA/2.5 W of current, only 100 mA from non-hub ports. USB 3.0 and USB On-The-Go supply 1.8 A/9.0 W (for dedicated battery charging, 1.5 A/7.5 W full bandwidth or 900 mA/4.5 W high bandwidth), while FireWire can in theory supply up to 60 watts of power, although 10 to 20 watts is more typical.

3. USB communications - Wikipedia

   en.wikipedia.org/wiki/USB_communications

   All USB hubs can operate at this rate. High speed (HS) rate of 480 Mbit/s was introduced in 2001 by USB 2.0. High-speed devices must also be capable of falling-back to full-speed as well, making high-speed devices backward compatible with USB 1.1 hosts. Connectors are identical for USB 2.0 and USB 1.x.

4. USB hub - Wikipedia

   en.wikipedia.org/wiki/USB_hub

   It is an important consideration that in common language (and often product marketing), USB 2.0 is used as synonymous with high-speed. However, because the USB 2.0 specification, which introduced high-speed, incorporates the USB 1.1 specification such that a USB 2.0 device is not required to operate at high speed, any compliant full-speed or ...

5. Lightning (connector) - Wikipedia

   en.wikipedia.org/wiki/Lightning_(connector)

   Lightning is an 8-pin digital connector. Unlike the 30-pin dock connector it replaced (and USB Type-A and -B connectors), it is reversible. [23] Most Lightning devices only support USB 2.0, which has a maximum transfer speed of 480 Mbit/s or 60 MB/s. With USB 2.0, only one lane is in use at a time.

6. USB hardware - Wikipedia

   en.wikipedia.org/wiki/USB_hardware

   Optionally, the hub controller may draw power for its operation as a low-power device, but all high-power ports must draw from the hub's self-power. Where devices (for example, high-speed disk drives) require more power than a high-power device can draw, [48] they function erratically, if at all, from bus power of a single port. USB provides ...

7. Thunderbolt (interface) - Wikipedia

   en.wikipedia.org/wiki/Thunderbolt_(interface)

   40 Gbit/s speed, DP 1.4, optional USB-C port compatibility, backwards compatibility when a Thunderbolt 3 docking station is connected to a non-Thunderbolt 3 computer 4 [172] JHL8140 [173] Peripheral: 1? 2.0: Hoover Ridge: 2021 Q1? TB4/USB4 endpoint, 3 downstream USB-C ports, 2 DP out adapters, USB3 hub, TB3 compatible.