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5 pin Micro USB A, Micro USB B plug connector layout
5 pin Micro USB A, Micro USB B plug connector
at the cable
5 pin Micro-USB Type A, Type B receptacle connector layout
5 pin Micro-USB Type A, Type B receptacle connector
at the device
Pinout compatibility:
  • Alcatel Tribe OT-980
  • Nokia 2605 Mirage
  • Nokia 2608
  • Nokia 3120 classic
  • Nokia 3600 Slide
  • Nokia 3608
  • Nokia 3610 Fold
  • Nokia 5220
  • Nokia 5310
  • Nokia 5320
  • Nokia 5610
  • Nokia 6205
  • Nokia 6210 Navigator
  • Nokia 6220 Classic
  • Nokia 6260 slide
  • Nokia 6500 Classic
  • Nokia 6500 Slide
  • Nokia 6555
  • Nokia 6600 Slide
  • Nokia 7100 Supernova
  • Nokia 7210 Supernova
  • Nokia 7610 Supernova
  • Nokia 8208
  • Nokia 8600 Luna
  • Nokia 8800 Arte
  • Nokia 8800 Carbon Arte
  • Nokia 8800 Gold Arte
  • Nokia 8800 Sapphire Arte
  • Nokia E63
  • Nokia E66
  • Nokia E71
  • Nokia N78
  • Nokia N79
  • Nokia N81
  • Nokia N81 8GB
  • Nokia N810
  • Nokia N82
  • Nokia N85
  • Nokia N97
  • Nokia Nokia 6212 Classic
  • Samsung G5
  • Samsung GB1
  • Samsung GB50
  • Samsung GB70
  • Samsung GS1
  • Samsung Q3
  • Samsung R0
  • Samsung R2
  • Samsung RB
  • Samsung VP2
  • Samsung YP-F3
  • Samsung Z3
Micro-USB connector visual pinout:
Micro-USB connector diagram
click to enlarge pinout
Micro-USB is a standard connector for a wide range of portable devices, including cell phones and smartphones
Pin Name Cable color Description
1 VCC Red +5 VDC
2 D- White Data -
3 D+ Green Data +
4 ID   Mode Detect. May be N/C, GND or used as an attached device presence indicator (shorted to GND with resistor)
5 GND Black Ground

USB pinout signals

USB is a serial bus. It uses 4 shielded wires: two for power (+5v & GND) and two for differential data signals (labelled as D+ and D- in pinout). NRZI (Non Return to Zero Invert) encoding scheme used to send data with a sync field to synchronise the host and receiver clocks. In USB data cable Data+ and Data- signals are transmitted on a twisted pair. No termination needed. Half-duplex differential signaling helps to combat the effects of electromagnetic noise on longer lines. Contrary to popular belief, D+ and D- operate together; they are not separate simplex connections.


The exact connector name is Micro-USB C or Micro-USB AB connector and it is documented in the USB standards, although some added pseudo-standards are found in the common implementation that are neither disallowed nor explicitly required by the documentation.

The device with the 5-pin connector has a pullup to high on the connector.

Low (small value resistor to ground or connection to ground) if you are connecting an accessory that the device must ask as a host for.

Let it remain high (no-connect) for a connection that the device should remain in normal (slave/client/peripheral) mode for.

Additional Psuedo-standard added by some device manufacturers: If there is no-connect on the data pins, the device will assume it is connected to a charging only cable.

Additionally, most devices can receive power in host mode, even though this is not part of the standard.

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