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High-speed hub bridge

A high-speed hub bridge is a device that combines hub and bridge functionality to expand connectivity and enable fast data transfer between different interfaces, such as USB, Ethernet, or serial buses.

Overview

A high-speed hub bridge serves two main purposes: it acts as a hub, allowing multiple downstream devices to connect to a single host, and as a bridge, enabling communication between different types of interfaces or protocols. These devices are commonly used in USB, Ethernet, and serial communication systems to increase connectivity while maintaining high data transfer rates. Key FeaturesHigh-Speed Data Transfer: Many hub bridges support USB 2.

0 Hi-Speed (up to 480 Mb/s) or high-speed UARTs with baud rates up to 5 Mibit/s. Multiple Downstream Ports: Devices like the FT4232H provide access to multiple USB ports, allowing several peripherals to connect simultaneously. Interface Bridging: They can convert between different protocols, such as USB-to-Ethernet, USB-to-I²C, or UART-to-USB, enabling devices with incompatible interfaces to communicate.

Integrated Control and Diagnostics: Many hub bridges include LEDs for port activity, configurable hub controllers, and error-handling features to monitor and manage connected devices. Flexible Power Options: Some devices can be powered via USB or an external supply to support multiple downstream devices. ApplicationsUSB Expansion: High-speed hub bridges allow PCs or embedded systems to connect to multiple USB peripherals while maintaining fast data rates.

Networking: USB-to-Ethernet bridges provide high-speed network connectivity for devices without native Ethernet ports, often supporting precision timing for synchronization. Embedded Systems: High-speed UART and bridge ICs enable communication between microcontrollers and multiple serial devices, reducing processor overhead and improving system performance. Media and Storage: Some hub bridges integrate flash media readers, allowing simultaneous access to storage devices and USB peripherals.

ExamplesFT4232H Module: A USB 2. 0 Hi-Speed hub and serial interface module with multiple downstream ports and configurable hub functions. USB2642: A USB 2.

0 hi-speed hub combined with a flash media reader and I²C/SD bridges for embedded applications.

NXP High-

Speed UAR

T Bridges: Provide multi-channel UART connectivity with high baud rates and low-latency bridging for embedded systems. High-speed hub bridges are essential in modern computing and embedded systems where multiple devices need to communicate efficiently across different interfaces while maintaining high data throughput.

High-speed hub bridge

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Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

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