USB-C to USB-C Cable USB-IF certified, UL9990 [UCC135]
USB-C to USB-C Cable USB-IF certified, UL9990
Connect USB-C devices and accessories, ideal for charging and audio, video, data syncing.
Get a fast charge with sturdy USB-C to USB-C (USB Type-C) cables from GenMore. Use them at home, in your car, or anywhere you need to sync music, photos, audio, video, data and charge your devices.
Connect USB Type-C enabled devices with each other for charging and data transfer e.g. MacBook, Chromebook Pixel, Galaxy Note, other type C android phones, and type-C enabled devices (car/wall charger, external battery power bank, etc.)
Fast Sync & Charge: Supports fast charging and data transfer speed.
Reversible design—easily insert the Type-C connector into any Type-C enabled device (does not matter which side is up).
Universal Compatibility: Designed to work flawlessly with any device that uses a USB-C port.
USB 2.0: Speed 480M, Rating 3A/5A
USB 3.1 GEN 1: Speed 5G, Rating 3A
USB 3.1 GEN 2: Speed 10G, Rating 5A
USB 3.2 GEN 2: Speed 20G, Rating 5A
USB4 : Speed 20G/40G, 100W USB-IF certified
Length varies depending on USB versions.
Connect USB-C devices and accessories, ideal for charging and audio, video, data syncing.
Get a fast charge with sturdy USB-C to USB-C (USB Type-C) cables from GenMore. Use them at home, in your car, or anywhere you need to sync music, photos, audio, video, data and charge your devices.
Connect USB Type-C enabled devices with each other for charging and data transfer e.g. MacBook, Chromebook Pixel, Galaxy Note, other type C android phones, and type-C enabled devices (car/wall charger, external battery power bank, etc.)
Fast Sync & Charge: Supports fast charging and data transfer speed.
Reversible design—easily insert the Type-C connector into any Type-C enabled device (does not matter which side is up).
Universal Compatibility: Designed to work flawlessly with any device that uses a USB-C port.
USB 2.0: Speed 480M, Rating 3A/5A
USB 3.1 GEN 1: Speed 5G, Rating 3A
USB 3.1 GEN 2: Speed 10G, Rating 5A
USB 3.2 GEN 2: Speed 20G, Rating 5A
USB4 : Speed 20G/40G, 100W USB-IF certified
Length varies depending on USB versions.
USB 3.1
In January 2013 the USB group announced plans to update USB 3.0 to 10 Gbit/s (1250 MB/s). The group ended up creating a new USB specification, USB 3.1, which was released on 31 July 2013, replacing the USB 3.0 standard. The USB 3.1 specification takes over the existing USB 3.0's SuperSpeed USB transfer rate, also referred to as USB 3.1 Gen 1, and introduces a faster transfer rate called SuperSpeed USB 10 Gbps, referred to as USB 3.1 Gen 2, putting it on par with a single first-generation Thunderbolt channel. The new mode's logo features a caption stylized as SUPERSPEED+.The USB 3.1 Gen 2 standard also reduces line encoding overhead to just 3% by changing the encoding scheme to128b/132b, with effective data rate of 1,212 MB/s. The first USB 3.1 Gen 2 implementation demonstrated real-world transfer speeds of 7.2 Gbit/s.
The USB 3.1 standard is backward compatible with USB 3.0 and USB 2.0. It defines the following transfer modes:
- USB 3.1 Gen 1 – SuperSpeed, 5 Gbit/s data signaling rate over 1 lane using 8b/10b encoding (effective 500 MB/s); the same as USB 3.0
- USB 3.1 Gen 2 – SuperSpeed+, new 10 Gbit/s data rate over 1 lane using 128b/132b encoding (effective 1212 MB/s)
The nominal data rate in bytes accounts for bit-encoding overhead. The physical SuperSpeed bit rate is 5 Gbit/s. Since transmission of every byte takes 10 bit times, the raw data overhead is 20%, so the byte rate is 500 MB/s, not 625. Similarly, at SS+ rate the encoding is 128/132, so transmission of 16 bytes physically takes 16.5 bytes, or 3% overhead. Therefore, the byte-rate at SS+ is 128/132 * 10 Gbit/s = 9.697 GBit/s = 1212 MB/s. In reality the SS bus has some additional service overhead (link management, protocol response, host latencies), so the best-case achievable data rates are about 10% smaller.
This rebranding of USB 3.0 as "USB 3.1 Gen 1" has allowed manufacturers to advertise products with transfer rates of only 5 Gbit/s as "USB 3.1," omitting the generation.
USB 3.2
The SuperSpeed USB 20Gbps (20 Gbit/s) packaging logo
On 25 July 2017, a press release from the USB 3.0 Promoter Group detailed a pending update to the USB Type-C specification, defining the doubling of bandwidth for existing USB-C cables. Under the USB 3.2 specification, released 22 September 2017, existing SuperSpeed certified USB-C 3.1 Gen 1 cables will be able to operate at 10 Gbit/s (up from 5 Gbit/s), and SuperSpeed+ certified USB-C 3.1 Gen 2 cables will be able to operate at 20 Gbit/s (up from 10 Gbit/s). The increase in bandwidth is a result of multi-lane operation over existing wires that were intended for flip-flop capabilities of the USB-C connector.
The USB 3.2 standard is backward compatible with USB 3.1/3.0 and USB 2.0. It defines the following transfer modes:
- USB 3.2 Gen 1 – SuperSpeed, 5 gigabits per second (Gbit/s) data signaling rate over 1 lane using 8b/10b encoding (effective 500 MB/s) , the same as USB 3.1 Gen 1 and USB 3.0.
- USB 3.2 Gen 2 – SuperSpeed+,10 gigabits per second (Gbit/s) data rate over 1 lane using 128b/132b encoding (effective 1,212 MB/s), the same as USB 3.1 Gen 2.
- USB 3.2 Gen 1×2 – SuperSpeed+, new 10 gigabits per second (Gbit/s) data rate over 2 lanes using 8b/10b encoding (effective 1 GB/s).
- USB 3.2 Gen 2×2 – SuperSpeed+, new 20 gigabits per second (Gbit/s) data rate over 2 lanes using 128b/132b encoding (effective 2,424 MB/s).
As with the previous version, the same considerations around encoding and effective data rates apply. Although both Gen 1 and 2 signal at 10 Gbit/s, Gen 1 uses the older, less efficient line coding which results in smaller byte-rate.
In May 2018, Synopsys demonstrated the first USB 3.2 Gen 2×2 connection, where a Windows PC was connected to a storage device, reaching an average speed of 1600 MB/s.
In February 2019, USB-IF simplified the marketing guidelines and required the SuperSpeed trident logos to include maximum transfer speed.
| USB-IFrecommended marketing name | Logo | Transfer mode | Older specifications | Dual-lane | Encoding | Nominal speed | Connectors |
|---|---|---|---|---|---|---|---|
| SuperSpeed USB 5Gbps |  |
USB 3.2 Gen 1 | USB 3.1 Gen 1, USB 3.0 | No | 8b/10b | 5 Gbit/s or 0.6 GB/s | USB-A, B, micro B & USB-C |
| SuperSpeed USB 10Gbps |  |
USB 3.2 Gen 2×1 | USB 3.1 Gen 2, USB 3.1 | No | 128b/132b | 10 Gbit/s or 1.2 GB/s | USB-A, B, micro B & USB-C |
| N/A | USB 3.2 Gen 1×2 | – | Yes | 8b/10b | 10 Gbit/s or 1.2 GB/s | USB-C | |
| SuperSpeed USB 20Gbps |  |
USB 3.2 Gen 2×2 | – | Yes | 128b/132b | 20 Gbit/s or 2.4 GB/s | USB-C |
Support of data transfer modes
Some transfer modes are supported by all USB4 devices, support for others is optional. The requirements for supported modes depend on the type of device.
| Mode | Host | Hub | Peripheral device |
|---|---|---|---|
| Legacy USB (1–2) (max. 480 Mbit/s) | Yes | Yes | Yes |
| USB4 20 Gbit/s Transport | Yes | Yes | Optional |
| USB4 40 Gbit/s Transport | Optional | Yes | Optional |
| Tunneled USB 3.2 (10 Gbit/s) | Yes | Yes | Yes |
| Tunneled USB 3.2 (20 Gbit/s) | Optional | Optional | Optional |
| Tunneled Displayport | Yes | Yes | Optional |
| Tunneled PCI Express | Optional | Yes | Optional |
| Host-to-Host communications | Yes | Yes | N/A |
| DisplayPort Alternate Mode | Yes | Yes | Optional |
| Thunderbolt Alternate Mode | Optional | Yes | Optional |
| USB-C Alternate Modes | Optional | Optional | Optional |
USB 3.x – 4.x data transfer modes
| (Gbit/s) | (GB/s) | |||||||
|---|---|---|---|---|---|---|---|---|
| Mode Name | Old Name | Encoding | Dual-Lane | Lane Speed (Gbit/s) | Nominal Speed | USB-IF Marketing Name | Logo | |
| USB 3.2 Gen 1×1 | USB 3.0, USB 3.1 Gen 1 |
8b/10b | No | 5 | 5 | 0.625 | SuperSpeed USB 5Gbps | |
| USB 3.2 Gen 1×2 | 8b/10b | Yes | 5 | 10 | 1.2 | N/A | ||
| USB 3.2 Gen 2×1 | USB 3.1 Gen 2 | 128b/132b | No | 10 | 10 | 1.2 | SuperSpeed USB 10Gbps | |
| USB 3.2 Gen 2×2 | 128b/132b | Yes | 10 | 20 | 2.4 | SuperSpeed USB 20Gbps | |
|
| USB4 Gen 2×1 | 64b/66b[a] | No | 10 | 10 | 1.2 | N/A | ||
| USB4 Gen 2×2 | 64b/66b[a] | Yes | 10 | 20 | 2.4 | USB4 20Gbps |  |
|
| USB4 Gen 3×1 | 128b/132b[a] | No | 20 | 20 | 2.4 | N/A | ||
| USB4 Gen 3×2 | 128b/132b[a] | Yes | 20 | 40 | 4.8 | USB4 40Gbps |  |
|
- ^ a b c d USB4 can use optional Reed–Solomon forward error correction (RS FEC). In this mode, 12 × 16 B (128 bit) symbols are assembled together with 2 B (12 bit + 4 bit reserved) synchronisation bits indicating the respective symbol types and 4 B of RS FEC to allow to correct up to 1 B of errors anywhere in the total 198 B block.
USB4 Gen 2 is different from USB 3.2 Gen 2. They only signify the same speed, i.e. 10 Gbit/s, but they are coded differently on the electrical layer.
Although USB4 is required to support dual-lane modes, it uses single-lane operations during initialization of a dual-lane link; single-lane link can also be used as a fallback mode in case of a lane bonding error.
In Thunderbolt compatibility mode, the lanes are driven slightly faster at 10.3125 Gbit/s (for Gen 2) and 20.625 Gbit/s (for Gen 3), as required by Thunderbolt specifications.
Power delivery
USB4 requires USB Power Delivery (USB PD). A USB4 connection needs to negotiate a USB PD contract before being established. A USB4 source must at least provide 7.5 W (5 V, 1.5 A) per port. A USB4 sink must require less than 250 mA (default), 1.5 A, or 3 A @ 5 V of power (depending on USB-C resistor configuration) before USB PD negotiation. With USB PD, up to 240 W of power is possible with 'Extended power range' (5 A at 48 V). For 'Standard Power range' up to 100 W is possible (5 A at 20 V).
Thunderbolt 3 compatibility
The USB4 specification states that a design goal is to "Retain compatibility with existing ecosystem of USB and Thunderbolt products." Compatibility with Thunderbolt 3 is required for USB4 hubs; it's optional for USB4 hosts and USB4 peripheral devices. Compatible products need to implement 40 Gbit/s mode, at least 15 W of supplied power, and the different clock; implementers need to sign the license agreement and register a Vendor ID with Intel.
Alternate Mode partner specifications
On 29 April 2020, DisplayPort Alt Mode version 2.0 was released, supporting DisplayPort 2.0 over USB4.