Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [usb-c]

USB (Universal Serial Bus) Type C, a 24 pin connector system with a rotationally symmetrical connector. Consider using the "USB" tag in addition to this one.

USB (Universal Serial Bus) Type C, a 24 pin connector system with a rotationally symmetrical connector.

See Wikipedia's article on USB Type C for more information.

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Why can't USB-C receivers be as small as their USB-A counterparts?

We're all familiar with the USB-A 2.4 GHz receivers from companies like Logitech that are absurdly small and barely protrude from the port. But when looking at available USB-C equivalents, they are quite a lot larger even after accounting for the…
Adam
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How is USB 3.2 still serial when there are so many data cables?

This is a very ignorant question, as I am just getting into wiring diagrams and trying to understand them, but look at this picture of usb-C with usb 3.2: With 2 high speed data paths, plus the old usb 2.0 data wires still there, how is this still…
justdoingmyjob
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Why does a female-female coupler break the USB-C standard?

I'm working on a project which uses a PCBA which basically acts as a USB-C extension. It has 2 USB-C receptacles (female) connectors. The mapping between the two receptacles is one to one. The pair of D+ and D- are shorted (meaning both orientation…
Frenetique
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Connecting two "USB C" hosts, what happens?

Up until USB C all the USB connectors were carefully chosen so that two hosts could not be plugged into each other. With USB C both the host and device have the same connector. With this setup it is now possible to plug two hosts into each other.…
vini_i
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Wiring diagram for USB-C to USB-A cable?

I make USB cables (USB-A to Mini or Micro primarily), but don't have any experience with USB-C. I would like to create a cable that has a USB-A (2.0) connector on one end, and a USB-C connector on the other (mainly for connecting keyboards to CPUs,…
rockwell
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Using USB-C as a power source

I'd like to complete an electronics project by allowing it to be powered over USB-C. The specification is complex, I'd love some help understanding it! I'll need to draw ~ 250mA at 5V for my project (though if there's an appreciable difference for…
JP.
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How to get 20 V from a USB-C charger?

I want to power my DIY stuff with a MacBook Pro USB C charger. The label on a charger says that it can provide three different power profiles: 20.2V - 4.3A 9V - 3A 5.2V - 2.4A There is a ton of information about what USB-C power distribution is…
George
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Does USB-A connector have the pins required for USB power delivery (PD)?

I have looked at various USB power delivery (PD) adapters that supply a certain number of watts and are powered by 230V mains voltage. Always, they seem to have either a USB-C port or a full USB-C cable permanently connected to the adapter. I have…
juhist
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Why would a USB-C adapter have a pull-up resistor?

I'm talking about a USB type-C male to USB type-A female adapter, the ones you need to connect a USB flash drive to the latest MacBooks. According to USB-C specification, this sort of adapter needs a 5.1 kΩ pull-down resistor on type-C plug's A5…
user2623008
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Can USB Type-C 2.0 upstream (device) connect its CC pins and share a pull-down?

Since USB Type-C cables have only a single CC wire for detecting orientation (Microchip USB Type-C diagram: can an upstream (device) connect its CC1 and CC2 pins and share a single pull-down resistor? This would prevent the device from detecting…
lynaghk
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Routing USB 3.x Type-C Signals

I'm designing an open source USB Type-C Switch (KVM Style), and I started to route the USB 3.x SuperSpeed+ and USB 2.x HighSpeed differential signal pairs on the PCB. The switch will have 2 input + 1 output USB Type-C ports. The USB 3.x SuperSpeed+…
bluetiger9
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USB-C Connector: How to route signals

I'm having trouble understanding how to route the signals out of the Molex 1054500101 Type-C USB connector - specifically the B1-B12 pins. The distance between row A and row B is only 0.5mm, too small for me to put any vias in between. That leaves…
VanGo
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Why are these capacitors needed on the USB-C CC lines?

The reference design for this USB-C chip recommends capacitors to ground between 200 and 600pF on the CCx lines. I have never seen a capacitor to ground on a digital signaling line. Does anyone know what these might be for? Other similar chips also…
mhz
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Implementing USB-C PD PHY directly into micro-controller

I want to explore more USB-C PD, in particular Programmable Power Supply (PPS), to supply my projects with power. There are some good projects1 using some standard communication (e.g. SPI or I2C) to communicate to as dedicated IC (e.g. STUSB4500,…
3244611user
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How come modern electronic devices support charging with various voltages through USB-C?

According to this blog post which tested charging a Samsung laptop through the USB-C port with multiple types of USB-C adapters and external batteries, it seems that that laptop can be charged with 5V, 9V, and 20V. But when I had researched on…
Damn Vegetables
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