The GL854G is a USB 2.0 hub controller IC manufactured by Genesys Logic. It is designed to provide a cost-effective and efficient solution for expanding the number of available USB ports in a system. This chip is commonly used in USB hubs, docking stations, and other devices that require multiple USB connections.

Applications:

• USB Hubs: Used as the main controller in standard USB 2.0 hubs.
• Docking Stations: Integrates into docking stations to provide multiple USB ports for peripherals.
• Embedded Systems: Suitable for embedded applications requiring USB connectivity.
• PC Motherboards: Used to expand the number of USB ports on the motherboard.
• Automotive Applications: Can be found in automotive infotainment systems to manage USB connections.

Features:

• Compliant with USB 2.0 specifications, supporting high-speed (480Mbps), full-speed (12Mbps), and low-speed (1.5Mbps) data transfer rates.
• Supports four downstream USB ports.
• Integrated USB transceivers for each port, ensuring signal integrity.
• Supports both individual and gang power management modes for power saving.
• Built-in 5V to 3.3V regulator, simplifying power supply design.
• Supports both bus-powered and self-powered configurations.
• Includes over-current detection and protection on each downstream port.
• Available in a QFN package for space-saving designs.

Benefits:

• Provides a simple and cost-effective solution for expanding USB connectivity.
• Ensures compatibility with a wide range of USB devices due to its USB 2.0 compliance.
• Reduces power consumption through efficient power management features.
• Simplifies circuit design with integrated components like the voltage regulator.
• Protects connected devices from damage with over-current protection.
• Enables compact designs due to the small QFN package.

Additional Details:

The GL854G operates over a specified temperature range, making it suitable for various operating environments. It supports both individual and gang modes for power management, allowing developers to optimize power consumption based on application needs. The chip also features integrated pull-up resistors for the USB data lines, further reducing the need for external components. The over-current protection is implemented using current-sense resistors, ensuring a reliable and safe operation. It also features short circuit protection on the downstream ports.