USB-C (Type-C) Connector Pinout
The 24-pin reversible USB connector — power, USB 2.0, SuperSpeed, and configuration.
Overview
USB Type-C is a 24-pin reversible connector. The pins are arranged in two rows (A1–A12 on top, B1–B12 on bottom) that mirror each other, which is what lets the plug go in either way — the cable presents the same signals whichever orientation you use.
Every USB-C connection carries power (VBUS/GND) and the USB 2.0 differential pair (D+/D−). The two CC (Configuration Channel) pins are the key addition: they detect orientation, negotiate which side is host/device, and carry USB Power Delivery messaging. The SuperSpeed pairs (TX/RX) and SBU pins are used by USB 3.x and alternate modes (e.g. DisplayPort).
For a simple 5 V device you only need VBUS, GND, D+, D−, and a 5.1 kΩ resistor from each CC pin to GND so the source knows a device is attached.
Pinout
| Pin | Name | Function | Description |
|---|---|---|---|
| A1 | GND | GND | Ground return. |
| A2 | SSTXp1 | USB3 / PAIR | SuperSpeed transmit 1 +. |
| A3 | SSTXn1 | USB3 / PAIR | SuperSpeed transmit 1 −. |
| A4 | VBUS | POWER | Bus power (5 V default; up to 20 V+ with PD). |
| A5 | CC1 | CC | Configuration channel: orientation + PD negotiation. |
| A6 | Dp1 | USB2 / DATA | USB 2.0 data +. |
| A7 | Dn1 | USB2 / DATA | USB 2.0 data −. |
| A8 | SBU1 | SBU | Sideband use (alt modes, e.g. DisplayPort AUX). |
| A9 | VBUS | POWER | Bus power. |
| A10 | SSRXn2 | USB3 / PAIR | SuperSpeed receive 2 −. |
| A11 | SSRXp2 | USB3 / PAIR | SuperSpeed receive 2 +. |
| A12 | GND | GND | Ground return. |
| B1 | GND | GND | Ground return. |
| B2 | SSTXp2 | USB3 / PAIR | SuperSpeed transmit 2 +. |
| B3 | SSTXn2 | USB3 / PAIR | SuperSpeed transmit 2 −. |
| B4 | VBUS | POWER | Bus power. |
| B5 | CC2 | CC | Configuration channel (other orientation). |
| B6 | Dp2 | USB2 / DATA | USB 2.0 data + (mirrored). |
| B7 | Dn2 | USB2 / DATA | USB 2.0 data − (mirrored). |
| B8 | SBU2 | SBU | Sideband use. |
| B9 | VBUS | POWER | Bus power. |
| B10 | SSRXn1 | USB3 / PAIR | SuperSpeed receive 1 −. |
| B11 | SSRXp1 | USB3 / PAIR | SuperSpeed receive 1 +. |
| B12 | GND | GND | Ground return. |
Notes
- Reversible: the A and B rows mirror each other so either orientation presents the same signals.
- A device must pull each CC pin to GND through a 5.1 kΩ resistor (Rd) so the source enables VBUS.
- USB 2.0-only devices use just VBUS, GND, D+, D−, and the CC resistors — the SuperSpeed/SBU pins are unused.
Reference: USB-IF — USB Type-C Specification· verified 2026-06-21