USBliitännettä

USBliitännettä is a Finnish term used to refer to the USB interface, including the physical connectors, signaling, and higher‑level protocols that enable communication between a host computer and peripheral devices. In standard Finnish, the term USB-liitäntä is used; USBliitännettä appears in some texts as a variant or proper-name usage.

The USB standard was developed by the USB Implementers Forum in the 1990s to simplify device connections and to reduce the variety of ports and cables. It has evolved through several generations, including USB 1.1, USB 2.0, USB 3.x, and USB4. Each revision increased data throughput and power delivery while preserving backward compatibility with older devices and connectors. Over time, USB has expanded from basic peripheral connectivity to include high-speed data transfer, device charging, and video and data delivery in certain configurations.

Physically, USB interfaces employ a range of connectors, such as Type-A, Type-B, Micro-USB, and the reversible USB-C connector. Cables and hubs enable multiple devices to share a single host port, and USB-C in particular supports higher power delivery and alternate modes for video or data. Data rates vary by generation: USB 1.1 up to 12 Mbps; USB 2.0 up to 480 Mbps; USB 3.x up to 5–20 Gbps; USB4 up to 40 Gbps. Power delivery standards allow negotiation of higher wattages over USB-C, enabling charging of laptops and other devices through a single interface.

USBliitännettä remains a foundational concept in modern electronics, underpinning storage devices, keyboards, mice, printers, displays, and more. Standards and safety requirements are maintained by the USB Implementers Forum and national technical glossaries; Finnish-language literature often uses USBliitännettä to describe the concept.