Microchip USB5744-I/2G: A 4-Port USB 2 Gen 1 Hub Controller for Embedded Systems

The increasing complexity of modern embedded systems demands robust and flexible connectivity solutions. At the heart of many such designs lies the USB hub, a critical component for expanding a single host connection into multiple ports. The Microchip USB5744-I/2G stands out as a highly integrated, industrial-grade 4-port hub controller designed to meet the rigorous demands of embedded applications, from industrial automation and medical devices to point-of-sale systems and networking equipment.

This controller is a fully self-contained hub solution, requiring minimal external components to operate. It integrates USB 2.0 transceivers, termination resistors, and a robust 5V to 3.3V/1.2V voltage regulator onto a single chip. This high level of integration significantly simplifies PCB design, reduces the overall bill of materials (BOM), and minimizes the physical footprint—a crucial advantage for space-constrained embedded designs.

A key feature of the USB5744 is its compliance with USB 2.0 Gen 1 (High-Speed 480 Mbps). Each of its four downstream ports supports this data rate, ensuring sufficient bandwidth for a wide array of peripherals simultaneously. The hub supports both individual and ganged power switching for its downstream ports, offering designers flexibility in power management. Furthermore, it includes comprehensive over-current (OC) detection for each port, providing critical protection for the host and the hub itself.

The device excels in its programmability and configuration options. It is a non-removable port hub, making it ideal for embedded systems where the topology is fixed. Its parameters can be easily customized via a serial I²C EEPROM or through straightforward strapping options on its GPIO pins. This allows designers to tailor aspects like vendor ID (VID), product ID (PID), port numbering, and power management settings without complex software drivers. For high-volume manufacturing, the OTP (One-Time Programmable) memory offers a cost-effective solution for storing custom configurations permanently.

Packaged in a compact 32-pin QFN, the USB5744-I/2G is built for reliability and operates over an extensive industrial temperature range (-40°C to +85°C), ensuring stable performance in harsh environments. Its design emphasizes low power consumption, a necessity for energy-efficient and often fanless embedded systems.

ICGOODFIND: The Microchip USB5744-I/2G is an exemplary solution for developers seeking a reliable, compact, and feature-rich USB hub IC. Its high level of integration, industrial durability, and flexible configuration options make it a superior choice for simplifying design and enhancing the connectivity capabilities of robust embedded systems.

Keywords: USB 2.0 Hub Controller, Embedded Systems, Industrial Temperature, High-Speed 480 Mbps, I²C Configuration.