Mondo Knows Facts

USB-C cables use a small pin to negotiate power

A configuration channel settles orientation and how much current may flow A USB-C plug has 24 pins, and one pair, known as the configuration channel, carries the exchange between charger and device. It establishes which way round the plug sits, which end is the host, and how much current the cable can safely take. Without that handshake a charger falls back to a low, safe current. It sits in Mondo's everyday life collection, one of 200 facts that each trace back to the reference below.

Where this comes from

USB Implementers Forum

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

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Tags: electronics, connectors, charging

USB-C cables use a small pin to negotiate power: the short answers

Where does this come from, and can I check it?
A configuration channel settles orientation and how much current may flow. The figure is taken from USB Implementers Forum, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a everyday life fact?
Yes. It sits on the Everyday Life shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?
The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.