USB 3.0 cables are more complex and employ shielding for some of the added data lines (2 pairs) a shield is added around the pair sketched. The data cables for USB 1.x and USB 2.x use a twisted pair to reduce noise and crosstalk. USB-Mini female is typically found on smaller peripherals (MP3 players, older cellphones, small external hard drives), and is usually a surface mount connector, trading robustness for size. If USB host commands are unanswered by the USB device within the allowed time, the host considers the command lost. The USB 3.0 standard does not directly specify a maximum cable length, requiring only that all cables meet an electrical specification: for copper cabling with AWG 26 wires the maximum practical length is 3 meters. The USB-Mini connection was the first standard attempt to reduce the size of the USB connector for smaller devices. All wires are shielded, and the data wires (positive and negative) are a twisted pair requiring no termination. The maximum length of a standard USB cable (for USB 2.0 or earlier) is 5 metres with devices operating at full speed (12 Mbit/s) or high speed (480mbit/s), and a maximum length of 3 metres with devices operating at low speed (1.5 Mbit/s) The primary reason for this limit is the maximum allowed round-trip delay of about 1,500 ns. The standard mini USB connector has five pins: Looking at the mini connector on a cable, pins are numbered 1-4 (X included), ascending, from left to right. Using the de-facto color is for industry types only. Just make sure the colors match from end to end. You can use any color wire to rig something. Outer shell is made of copper braid and aluminum shield.Ĭolors do not mean anything in the wiring scheme.
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