USB Standard
USB 2.0
USB 2.0 raised USB data speeds to 480 Mbps with High-Speed mode while keeping support for the earlier Low-Speed and Full-Speed modes used by older devices.
Overview · Compatibility · Articles
Related: USB Standards · USB 1.x · USB 3.0
USB 2.0 overview
USB 2.0 introduced 480 Mbps High-Speed operation while retaining the earlier Low-Speed and Full-Speed modes used by many simple peripherals.
| Maximum data rate | 480 Mbps (High-Speed) |
|---|---|
| Other supported rates | 12 Mbps Full-Speed and 1.5 Mbps Low-Speed |
| Common connectors | USB-A, USB-B, Mini-USB, Micro-USB, and later USB-C implementations |
| USB-C support | Yes; USB-C ports and cables can carry USB 2.0 data |
| Backward compatibility | Designed to work with earlier USB speeds where supported |
| Current status | Still widely used for lower-bandwidth devices and compatibility |
Sources: USB-IF USB 2.0 Specification, USB-IF USB 2.0 cable and connector document, and USB-IF USB Type-C Cable and Connector Specification.
USB 2.0 compatibility
USB 2.0 works with many newer USB hosts because they retain a USB 2.0 data path, but the connection cannot exceed the slowest supported mode in the chain.
| Connection | What happens | Main limit |
|---|---|---|
| USB 2.0 device + USB 2.0 host | High-Speed devices can operate at up to 480 Mbps | The device, host, and cable must all support High-Speed USB |
| USB 2.0 device + USB 3.x or USB4 host | Normally uses the host's backward-compatible USB 2.0 path | Maximum USB 2.0 data rate of 480 Mbps |
| USB 3.x device + USB 2.0 host | Can fall back to USB 2.0 when the device and connector support that path | The USB 2.0 host |
| USB 2.0 over USB-C | Works normally when the port and cable provide USB 2.0 data | USB-C describes the connector, not the data speed |
| USB 2.0-only USB-C cable + faster USB devices | The devices can connect, but USB data is limited to 480 Mbps | The cable's USB 2.0 data capability |
| USB hub or adapter in the path | Works at the best USB mode supported by every part of the chain | The slowest host, hub, adapter, cable, or device |
| USB 2.0 data + modern fast charging | Data can remain USB 2.0 while charging uses a separate supported power system | Charging depends on USB power and charging support, not the USB 2.0 data rate |
Sources: USB-IF USB 2.0 Specification, USB-IF USB Type-C Cable and Connector Specification, and USB-IF USB 2.0/USB 3.2 interoperability test procedures.
USB 2.0 articles
Explore guides about USB 2.0 compatibility, ports, cables, hubs, transfer speeds, legacy devices, and how USB 2.0 works with newer standards.
