Type C USB

Developed at roughly the same time as but distinct from the USB 3.1 specification, the USB Type-C Specification 1.0 defines a new small reversible-plug connector for USB devices.

The type-C plug connects to both hosts and devices, replacing various type-B and type-A connectors and cables with a standard meant to be future-proof, similar to Apple Lightning and Thunderbolt. The 24-pin double-sided connector provides four power/ground pairs, two differential pairs for USB 2.0 data bus (though only one pair is implemented in a type-C cable), four pairs for high-speed data bus, two "sideband use" pins, and two configuration pins for cable orientation detection, dedicated biphasic mark code (BMC) configuration data channel, and VCONN +5 V power for active cables. Type-A and type-B adaptors/cables will be required for older devices in order to plug into type-C hosts; adaptors/cables with a type-C receptacle are not allowed.

Features:

Mechanical specs (preliminary):
•  Receptacle opening: ~8.3mm x ~2.5mm
•  Durability: 10,000 cycles
•  Improved EMI and RFI mitigation features

Power delivery capacity:
• 3A for standard cables
• 5A for connectors

Functional capabilities:
• USB 2.0: LS/FS/HS
• USB 3.1: Gen1 (5Gbps)/Gen2 (10Gbps)

Enhanced power delivery options:
• Extended 5V current ranges plus USB PD

Docking support:
• USB PD-based interface configuration option