The Type-C specs define backward compatibility by specifying "legacy cable assemblies" like "USB 2.0 Standard-B to Type-C", which implies that there must be USB 2.0 Standard-B receptacles to work with. One bus is a USB 2.0 bus (see Universalįormally it means that all USB 2.0 provisions, with all ECNs are still in effect, including all connector arrangements.ĪMPLIFICATION: More formally, USB electro-mechanical connectivity nowadays is defined in the USB Type-C specifications.
USB 3.2 is a dual-bus architecture that provides backwardĬompatibility with USB 2.0. So using mini-B won't lead to USB-IF certification logo, but the old-style USB 2.0 Type-B receptacle is still a valid design option.ĬLARIFICATION: USB 3.2 Specifications state, Section 3, page 15 mini-B, and mini-AB receptacle, which was retired from USB 2.0 specifications, and superseded by flimsy micro-A-B set of connectors. Also, the port/jack itself may be at the receiving end. Four contacts - All USB connectors have at least four contacts (although some may have five, and USB 3.0+ connectors. Inevitably, even with the most careful use of a phone, with time or by accident, the micro USB connector of your cable can be damaged by dust, contamination (like calcium, road salt), or simply get stretched to the point it will not stay in place anymore.
It may be possible to force a connector in wrong, but that will result in damage to the device. These are the five common types of USB connector that work with USB 2.0. The exception is the set of mini connectors, mini-A. However, all USB connectors will have some things in common: Polarization - A USB connector can only nominally be inserted one way. USB 3.0 (now USB 3.2 Gen 1), 2008, 5 Gbit/s, USB-A, USB-B SuperSpeed, Micro-B. These additional pins are used to enable the faster data transfer rate found in USB 3. Located in the USB 3.1 Legacy Cable and Connector specification. USB 3.0 Type-A connectors have nine pins, considerably more than the four pins that make up USB 2.0 and USB 1.1 Type-A connectors. The electro-mechanical definition and requirements for USB connectorsĪnd cables have been removed from this specification and are now The new revision of USB standard only splits the legacy cable drawings and definitions into a separate document (from USB 3.2 specs, Section 5 page 50): All USB revisions (including latest revision of USB standard, USB 3.2) include backward compatibility with USB 2.0, the general packet-based framework remains the same, and all legacy cable assemblies (which includes USB 2.0 Type-B connector) are fully specified. In the USB standard, there is a difference between the two, and the connectors on cables and devices reflect this. USB B connector is still part of the USB standard, "filo" is correct. USB connectors come in two flavors: host and peripheral.