USB3503AI-1-GL-TR

Controllers Overview

The USB3503AI-1-GL-TR is a low-power, USB 2.0 hub controller manufactured by Microchip Technology. It features an HSIC upstream port and three downstream USB ports supporting high-speed, full-speed, and low-speed devices. The component operates on a single 3.3V supply with internal regulators generating 1.2V for the digital core. It supports reference clock frequencies of 12, 19.2, 24, 25, 26, 27, 38.4, or 52 MHz via external inputs. Typical standby current is 1 µA. The device is housed in a 25-pin WLCSP package measuring 1.97mm x 1.97mm with a 0.4mm ball pitch.

Controllers Feature Summary

• Integrated MultiTRAK technology providing dedicated transaction translators per port to maintain consistent full-speed data throughput.
• Configurable PortMap functionality allowing flexible port mapping and disable sequencing for platform design optimization.
• Programmable PHYBoost and VariSense features for adjusting signal drive strength and receiver sensitivity to recover signal integrity.
• Supports customizable vendor ID, product ID, and string descriptors through the serial I2C slave interface.

Controllers Applications

• Mobile Phones
• Tablet Computers
• Ultra Mobile PCs
• Digital Still Cameras
• Portable Media Players

Controllers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature range. Ensure compatibility with the required reference clock frequency configuration during system integration. Confirm that the selected variant meets the intended environmental operating conditions for the final application.

Controllers Selection Notes

Select this component when a compact USB hub solution is required for battery-powered mobile devices. Consider the 25-pin WLCSP package for minimal board space requirements. Evaluate the need for I2C configurability if custom descriptors or dynamic port mapping are necessary for the host system architecture.

Controllers Part Context

This part belongs to the USB3503 series of USB 2.0 hub controllers designed for portable applications. It serves as a bridge between an HSIC host interface and multiple downstream USB peripherals. The AI-1-GL-TR designation indicates the specific commercial grade, package, and tape-and-reel packaging configuration offered by the manufacturer.

Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's official selector guide for alternative packages or variants within the same family.