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USB Type C connector and cable

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mansaxel:

--- Quote from: GeorgeOfTheJungle on January 23, 2020, 09:17:36 am ---
RS-232? Hello? Tooki? It's 2020 already!  :)

--- End quote ---

I use it every day.  Because it works.

GeorgeOfTheJungle:

--- Quote from: mansaxel on January 23, 2020, 02:15:48 pm ---I use it every day.  Because it works.

--- End quote ---

In new designs? Bipolar? +/- 25V? Really? Thermionic valves work too but...  :wtf:

Berni:
Yeah you get at best +/- 10V out of your usual charge pump style RS232 transceiver IC these days. Even less for ones running from 3.3V

Also they have pretty limited current on the output so the ESD diodes in a USB port would probably just clamp it down.

Howardlong:

--- Quote from: Berni on January 22, 2020, 07:03:53 am ---You can plug any two USB-C devices together using a cable, but it will only actually work correctly if both devices support the same features from that list above.So in this regard USB-C is already fucked from the start. Only guarantee is USB 2.0, everything else is a gamble. :palm:

--- End quote ---

..."using a cable"... and there's another rub! Not even apparently identical cables are the same, not by a long way. For a consumer it's a disaster.

I'll also add my 2 cents that, both physically and electrically, USB Type C has shown itself to be very fragile. IMHO while the aim was noble, trying to share a tiny high density connector with high power and high speed data was a mistake. The USB receptacle itself has proven to be very likely to fail (as well as the high speed data muxes) and if soldered to a motherboard for example, it can be a very expensive failure, especially if the SSD is soldered in too.

When it works it's great, my OH has an external 15" monitor that plugs into the USB C on her laptop, and all the power and video goes down the same cable. But not many USB Type C cables support high speed data/video and power delivery.

Edit: when USB Type C works, it's often the exception rather than the rule.

tooki:

--- Quote from: GeorgeOfTheJungle on January 23, 2020, 09:17:36 am ---
--- Quote from: tooki on January 23, 2020, 06:15:57 am ---Will it really handle the ±25V allowed in RS-232 without damage? I kinda doubt it.

--- End quote ---

RS-232? Hello? Tooki? It's 2020 already!  :)

--- End quote ---
When an external serial port is discussed without specifying a particular standard, it remains understood that RS-232 is meant. TTL serial is extremely rare for external ports. (The debug headers on PCBs don’t count as external.)

RS-233 ports are still widely used in some applications, even if I haven’t used one in years. (And as a long-time Mac user, most of the serial I used back in the day was actually RS-422.)

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