Electronic devices rely on USB to connect for data transmission, but how familiar are you with the types and versions in the market? Bookmark this article for a reference of common USB!
Universal Serial Bus (USB) Definitions
USB is a highly common interface standard for data and power connections between a wide variety of electronics. Connectors and technologies continue to evolve since its introduction back in 1996.
Types are defined as the shape of the connectors, whereas Versions refer to the USB technology, and the highest data.
Below tables show a non-exhaustive summary:
USB Fun Facts
Mandatory Markings
USB cables are used for the transfer of electrical currents (data, power) and meet the definition of ‘EEE’.
Therefore, CE marking is required according to RoHS Directive 2011/65/EU.
And “Waste EEE” marking (crossed-out recycle bin) is required according to WEEE Directive 2012/19/EU.
The USB Symbol
The “Trident” symbol without additions can be used without a license, the same goes for the word “USB”.
However, a wide variety of other USB symbols require a logo trademark license agreement with the USB Implementers Forum (USB-IF): licensed logo’s.
Battery Charging 1.2
The Battery Charging 1.2 (BC) specification introduced a charging option for the USB port. The BC connection increases the maximum current of a standard USB port for faster charging. A normal USB 2.0 port provides up to 500mA (0.5 A) and a USB 3.0 port provides up to 900mA (0.9 A). A BC 1.2-compliant port provides up to 1.5 A, even while transferring data.
Power Delivery
Extension protocol for delivery of power levels ranging from 5 to 100 Watts (20 V @ 5 A.) over USB connections.
Make sure that the cable is capable of carrying the related currents.
On-The-Go (OTG)
USB OTG is a specification that enables devices like smartphones to act as both hosts and peripherals.
This allows for functions like connecting USB flash drives, keyboards, or game controllers to a mobile device.
Available from the USB Implementers Forum, it is a supplement to the USB 2.0 Specification.
USB Colours
Colours are not required by the USB standards and use of the colour varies between manufacturers. Blue cables and connectors are common for type A, version 3.
This article is originally published by ProductIP:
Caspar ter Horst – Managing Director, ProductIP
Caspar has 25+ years of experience in product compliance. In 2008, he co-founded ProductIP together with Maarten van der Dussen. Caspar and his team are dedicated to support companies within the supply chain to efficiently demonstrate to customers, authorities, and users that their products meet applicable legislation and buying requirements. As a result, helping companies reduce costs, streamline operations, manage suppliers, and at the same time put compliant, safer, more sustainable products to the market.
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