page_title: USB hardware
section_title: Pinouts
hierarchical_section_title: USB hardware / Connectors / Connector properties / Pinouts
caption_attribution_description: English: Pin assignment of USB 3.0 Micro B plug No.1:power line (VBUS) No.2:USB2.0 D- No.3:USB2.0 D+ No.4:USB OTG's ID line No.5:GND No.6:USB3.0 Sending Data line- No.7:USB3.0 Sending Data line+ No.8:GND No.9:USB3.0 Receiving Data line- No.10:USB3.0 Receiving Data line+
context_page_description: The initial versions of the USB standard specified connectors that were easy to use and that would have acceptable life spans; revisions of the standard added smaller connectors useful for compact portable devices. Higher-speed development of the USB standard gave rise to another family of connectors to permit additional data paths. All versions of USB specify cable properties; version 3.X cables include additional data paths. The USB standard included power supply to peripheral devices; modern versions of the standard extend the power delivery limits for battery charging and devices requiring up to 100 watts. USB has been selected as the standard charging format for many mobile phones, reducing the proliferation of proprietary chargers.
context_section_description: USB 2.0 uses two wires for power (VBUS and GND), and two for differential serial data signals.  Mini and micro connectors have their GND connections moved from pin #4 to pin #5, while their pin #4 serves as an ID pin for the On-The-Go host/client identification.
  USB 3.0 provides two additional differential pairs (four wires, SSTx+, SSTx−, SSRx+ and SSRx−), providing full-duplex data transfers at SuperSpeed, which makes it similar to Serial ATA or single-lane PCI Express.
  In some sources D+ and D− are erroneously swapped.
caption: Micro-B SuperSpeed plug Power (VBUS, 5 V)Data− (D−)Data+ (D+)ID (On-The-Go)GNDSuperSpeed transmit− (SSTx−)SuperSpeed transmit+ (SSTx+)GNDSuperSpeed receive− (SSRx−)SuperSpeed receive+ (SSRx+)
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