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USB cable - dual head

Hello,
I am not quite sure about dual-head USB cable pinout.
This is what I understood so far:

Both power and data cables (with separate USB type A connectors at PC end) connect to one type B connector at DAC end. Later the power type A connector gets unplugged, after initial "handshake".

1. DATA cable - has 3 wires, Signal +, Signal -,
and power - (ground).

2. POWER cable - has 2 lines, power + (5 VDC)
and power - (ground).

Is this right? Or data cable carries ONLY Signal + and Signal -?

After the USB A connector with power is unplugged, I guess you must have ground also in data cable? Or not?

Any help would be very appreciated. Thanks :)
audiobb

Showing 1 response by deadlyvj

deadlyvj
66 posts
 
Hi,
The power cable can be disconned in DACs with their own power supply. It is however need in some for the initial handshake.

The data lead also has the ground.

Please make sure the cable has a bandwidth, I just bought a cable, and did not realize it was limited to 196/24. Preferably these cables must meet the USB standard, capable for 480 Mb/s.
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