The USB4640-HZH is a highly integrated 4-port USB 2.0 hub controller manufactured by SMSC Corporation (now Microchip Technology). It provides a complete solution for adding multiple USB ports to embedded systems, PCs, and other devices. This hub controller supports both high-speed (480Mbps) and full-speed (12Mbps) USB devices, offering versatile connectivity options.

Applications:

• Embedded Systems: Adding USB connectivity to embedded devices such as industrial controllers and medical equipment.
• PCs and Laptops: Expanding the number of USB ports on PCs and laptops.
• Docking Stations: Providing USB connectivity in docking stations for mobile devices.
• Automotive Infotainment Systems: Integrating USB ports into automotive infotainment systems.
• Consumer Electronics: Adding USB ports to TVs, set-top boxes, and other consumer electronics devices.

Features:

• 4-Port USB 2.0 Hub: Provides four downstream USB ports.
• High-Speed (480Mbps) Support: Supports high-speed USB 2.0 data transfer rates.
• Full-Speed (12Mbps) Support: Supports full-speed USB 1.1 devices.
• Integrated USB Transceivers: Reduces component count and simplifies design.
• Individual Port Power Control: Allows for enabling or disabling power to individual ports.
• Over-Current Protection: Protects against over-current conditions on each port.
• Multiple Power Supply Options: Supports various power supply configurations.
• Small Package Size: Facilitates integration into compact systems.

Benefits:

• Expanded USB Connectivity: Increases the number of available USB ports.
• High-Speed Data Transfer: Supports fast data transfer rates for USB 2.0 devices.
• Versatile Application: Suitable for a wide range of USB connectivity applications.
• Simplified System Design: Reduces component count and simplifies system integration.
• Enhanced System Reliability: Protects against over-current conditions.

Additional Details:

The USB4640-HZH is typically configured via external resistors or through an I2C interface. It supports both bus-powered and self-powered modes. The hub controller requires an external crystal oscillator for clock generation. The datasheet provides detailed information on its electrical characteristics, pinout, and configuration options. It is available in a surface-mount package. Proper PCB layout is essential for optimal performance, particularly with respect to signal integrity and noise reduction. External components, such as decoupling capacitors and termination resistors, are required. It is compliant with USB 2.0 specifications.