The developer of USB reveals 'the reason why there is a back and forth in USB'


By rawpixel.com

Most of the 'USB (Universal Serial Bus)' standards for connecting computer peripherals have both sides, often saying 'Oh, I'm not stabbing ... reverse ?!' Every time I try to plug in USB in the wrong direction, there are people who often get angry like 'Why did you design this!' Such USB developer Ajay Butt has clarified ' Why the USB connector has both sides '.

Ever Plugged A USB In Wrong? Of Course You Have. Here's Why: NPR
https://www.npr.org/2020/06/21/734451600/ever-plugged-a-usb-in-wrong-of-course-you-have-heres-why

In the late 1990s, Intel developed USB, a ubiquitous connection interface that allows peripheral devices such as mice and printers to be connected to a PC. USB has spread rapidly due to its convenience, but has had a problem with the connector.

In an interview with National Public Radio, Butt, who was the leader of the development project team, said, 'The biggest problem is that there is a back and forth,' he says he understands this problem. But Butt still supports the back and forth design of USB.

By Rawpixel

According to Butt, the reason for adopting a design with both sides of USB is 'cost'. If it were to be possible to plug in either side without USB, it would require twice as much wire and circuitry, and twice as much price. As the manufacturing cost of USB goes up, the cost of PCs equipped with USB ports also goes up. At that time, the idea of “a terminal that can connect all peripheral devices such as a mouse and a printer” itself was novel, and its manufacturing cost was always a problem in order to sell it to a PC manufacturer with a USB port.

An iMac with a USB port appeared in 1998, and the Windows 98 Second Edition , released in 1999, was officially USB compliant, probably because the thorough cost reduction strategy worked. Since then, USB has continued to become popular, and has grown to the size that is said to be the industry standard in the modern age. As a result of the USB breakthrough, there is no longer a 'port unique to that printer' or 'a port unique to this keyboard'.

by Marco Verch

Butt said that 'Development is a team sport and fame should be given to the technology itself' regarding the development of USB, and he has not received any patent fees from Intel.

National Public Radio pointed out, 'There was also a proposal for a round design rather than a rectangular design with a 50% plug-in success rate,' while 'it was better than being more difficult to plug into.' I wrote it.


In addition, USB Type-C that can be plugged into a reversible appeared in 2014.

in Hardware, Posted by log1k_iy