The Genesys Logic GL850G is a popular USB 2.0 hub controller. It provides a cost-effective solution for adding multiple USB ports to a system. The GL850G supports high-speed (480Mbps), full-speed (12Mbps), and low-speed (1.5Mbps) USB devices. It is a single-chip solution, integrating a USB 2.0 transceiver, hub controller, and downstream USB ports.

Applications

• USB Hubs: The primary application is in creating standalone USB hubs with 4 downstream ports.
• Embedded Systems: Used in embedded systems requiring multiple USB connections.
• Laptop Docking Stations: Integrated into docking stations to expand USB connectivity.
• PC Motherboards: Found on some PC motherboards to provide additional USB ports.
• Industrial Equipment: Employed in industrial equipment needing robust USB connectivity.

Features

• USB 2.0 Compliant: Supports USB 2.0 high-speed, full-speed, and low-speed operations.
• Four Downstream Ports: Provides four downstream USB ports for connecting devices.
• Integrated USB Transceiver: Includes an integrated USB transceiver for efficient communication.
• Individual Port Power Control: Supports individual power control for each downstream port.
• Over-Current Protection: Features over-current protection to prevent damage to the hub and connected devices.
• Supports Self-Powered and Bus-Powered Modes: Operates in both self-powered (with an external power supply) and bus-powered (powered by the USB host) modes.
• EEPROM Interface: Has an EEPROM interface for customization and configuration.
• Available in QFN Packages: Typically available in compact QFN packages for space-saving designs.

Benefits

• Increased USB Connectivity: Expands the number of available USB ports on a system.
• Cost-Effective Solution: Provides a low-cost way to add USB hub functionality.
• Ease of Integration: The single-chip design simplifies integration into various systems.
• Reliable Performance: Ensures reliable USB communication with integrated protection features.
• Flexible Power Options: Supports both self-powered and bus-powered configurations.

Additional Details

The GL850G typically requires minimal external components, making it easy to design into a wide range of products. It often interfaces with an EEPROM to store configuration settings, such as vendor ID, product ID, and other customization parameters. Power management features allow the hub to conserve energy when ports are not in use. This chip is commonly found in USB hubs available from many retailers.