Type-C (or USB-C) is a 24-pin USB connector system. This is distinguished by its two-fold rotationally symmetrical connector. The USB Type-C Specification 1.0 was published by the USB Implementers Forum (USB-IF). It was finalized in August 2014. A device that implements USB-C does not necessarily implement USB Power Delivery, USB 3.1 or Alternate Mode.
The USB-C connectors connect to both hosts and devices. This has replaced various USB-B and USB-A connectors and cables with a standard meant to be future-proof. It is a 24-pin double-sided connector and is slightly larger than the micro-B connector. It measures around 8.4 millimetres (0.33 in) by 2.6 millimetres (0.10 in). The receptacle features four power and four ground pins, two differential pairs for high-speed USB data, four shielded differential pairs for Enhanced SuperSpeed data in which two transmit and two receive pairs, two Sideband Use (SBU) pins, and two Configuration Channel (CC) pins.
The plug has only one high-speed differential pair, and one of the CC pins is replaced by VCONN which power electronics in the cable while the other is used to actually carry the Configuration Channel signals. These signals are used to determine the orientation of the cable also they carry USB PD communications. For connecting an older device to a host with a USB-C receptacle a cable or adapter with a USB-A or USB-B plug or receptacle on one end and a USB-C plug on the other end is required.
Advantages of a Type-C –
- It’s small. The port is half the width and one-third the height of a standard USB connector and only slightly larger than Apple’s Lightning or the micro-USB connectors.
- It’s reversible. Unlike older USB cable, it doesn’t matter which side is up with a Type-C plug i.e. you can insert it either way.
- It’s fast. Type-C ports can transfer data using the zippy speeds of the latest version of the USB protocol which is up to 10 gigabits per second.
- It’s powerful. The new connector can provide up to 100 watts of power which is enough to power a laptop.
- It’s flexible. Via adapters, users will be able to connect older devices to Type-C ports which means even devices that use non-USB technologies, like DisplayPort, VGA and Ethernet.
Disadvantages of Type-C –
- Many devices still do not support USB Type-C. Being the most versatile connector there are still some devices that are not coming with the USB Type-C support.
- Users and exposed to some security threats: Some recent studies showed that the new USB Type-C ports are very thin in terms of the security. The malware like BadUSB can enter laptops through firmware in the cable without the user knowing.