Infineon ISP752T USB 2.0 High-Speed Hub Controller: Features and Applications

The Infineon ISP752T is a highly integrated 4-port universal serial bus (USB) 2.0 high-speed hub controller, designed to provide a robust and efficient solution for expanding USB connectivity in a wide array of electronic systems. As the demand for connecting multiple peripherals to a single host port grows, the role of reliable hub controllers becomes paramount. The ISP752T stands out by offering a combination of high performance, low power consumption, and advanced features tailored for both consumer and industrial applications.

A core feature of the ISP752T is its full compliance with the USB 2.0 specification, ensuring seamless interoperability with a vast ecosystem of existing USB devices. It supports high-speed (480 Mbps), full-speed (12 Mbps), and low-speed (1.5 Mbps) data rates, automatically negotiating the optimal speed for each connected downstream device. This backward compatibility is crucial for connecting legacy peripherals without sacrificing performance for newer high-speed devices.

The hub's architecture is built around a highly integrated single-chip design, which incorporates all necessary components, including the USB transceivers, a serial interface engine (SIE), and a hub repeater. This integration significantly simplifies PCB design, reduces the overall bill of materials (BOM), and minimizes the physical footprint of the end product. Furthermore, the controller includes integrated 5V-to-3.3V and 3.3V-to-1.8V voltage regulators, enhancing power efficiency and reducing the need for external regulator components.

Power management is a critical strength of the ISP752T. It supports individual or ganged power switching and over-current protection for each downstream port. This allows the system to monitor and control power to each port independently, enabling features like hot-swapping and providing robust protection against short circuits and excessive current draw, which is vital for maintaining system stability.

For system configuration and management, the ISP752T offers a degree of flexibility through programmable features via external EEPROM. This allows OEMs to customize various parameters, such as vendor ID (VID), product ID (PID), port numbering, and power management modes, to tailor the hub's functionality to specific product requirements without altering the core hardware design.

In terms of applications, the Infineon ISP752T is exceptionally versatile. It is ideally suited for:

Desktop and Notebook PCs: Expanding the number of available USB ports for connecting keyboards, mice, printers, and external storage.

Docking Stations: Serving as the core hub IC in docking solutions that provide multiple USB ports alongside other connectivity options.

Industrial and Embedded Systems: Providing reliable USB connectivity in demanding environments for data acquisition, control systems, and test and measurement equipment.

Consumer Electronics: Integrated into devices like monitors, printers, and audio interfaces to offer built-in USB hub functionality.

ICGOODFIND: The Infineon ISP752T is a proven and reliable USB 2.0 hub controller that successfully balances performance, integration, and power efficiency. Its comprehensive feature set, including built-in regulators and robust port power management, makes it an excellent choice for designers seeking a simple yet effective solution to expand USB connectivity across diverse applications, from consumer gadgets to robust industrial systems.

Keywords: USB 2.0 Hub Controller, High-Speed Data Transfer, Integrated Voltage Regulators, Port Power Management, EEPROM Programmability.