![](https://csdnimg.cn/release/download_crawler_static/10519456/bg5.jpg)
DocID028454 Rev 1 5/23
AN4775 USB Type-C™ in a nutshell
22
1 USB Type-C™ in a nutshell
The USB Implementers Forum (USB-IF) introduces two complementary specifications:
The USB Power Delivery (PD) specification rev2.0 details how a link can be
transformed from a 4.5W power source (900mA at 5V on V
BUS
) to a 100W power or
consumer source (up to 5A at 20V).
The USB Type-C™ cable and connector specification rev1.1 details a reversible, slim
connector system based on high speed USB2.0 signals and two SuperSpeed lanes at
up to 10 Gbps, which can also be used to support Alternate Modes.
The new connector is designed to be non-polarized and fully reversible, no matter which
way it is inserted.
As such, this new reversible 24-pin USB Type-C™ plug is aimed to be an universal
connector with all the advanced features proposed by Power Delivery:
negotiating power roles,
negotiating power sourcing and consumption levels,
performing active cable identification,
exchanging vendor specific sideband messaging,
performing Alternate Mode negotiation,
allowing third-party communication protocols to be routed onto the reconfigurable pins of the
USB Type-C™ cable.
Figure 1. USB plug form factors
0699
DƵůƚŝƉůĞĐŽŶŶĞĐƚŽƌƐƚŽƐƵƉƉŽƌƚ
ĂůůŬŝŶĚŽĨh^ĚĂƚĂ
hŶŝƋƵĞ
ƌĞǀĞƌƐŝďůĞ
ĐŽŶŶĞĐƚŽƌĨŽƌĂůů
ƐƉĞĐŝĨŝĐĂƚŝŽŶƐ
DŝŶŝ DŝĐƌŽ
ϮϬ ϮϬ
ϯϬ