# Universal Serial Bus (USB)

Developed by Compaq, Hewlett-Packard, Intel, Lucent, Microsoft, NEC and Phillips.

USB A
USB B

Series "A" plugs are used towards the host system and series "B" plugs are used towards the USB device.

Pin | Name | Description
--- | --- | ---
1 | VBUS | +5 VDC
2 | D- | Data -
3 | D+ | Data +
4 | GND | Ground

Contributor: Joakim Ögren, Tomas Ögren

Source:
USB FAQ at USB Implementers Forum,
USB Specification v2.0 at USB Implementers Forum

Copyright © The Hardware Book Team 1996-2001.
May be copied and redistributed, partially or in whole, as appropriate.
Document last modified: 2001-06-08