USB2503A-HZH

Controllers Overview

The USB2503A-HZH is a Microchip Technology integrated USB 2.0 compatible 3-port hub controller housed in a 48-pin QFN package measuring 7.15 x 7.15 x 0.95mm. It supports High-Speed (480Mbps), Full-Speed (12Mbps), and Low-Speed (1.5Mbps) data rates with dedicated Transaction Translators for each downstream port. The device operates on a 1.8V core voltage with 3.3V I/O tolerant to 5V inputs, powered by an internal 1.8V linear regulator. Configuration is supported via hardware strapping, SMBus slave interface, or external I2C EEPROM.

Controllers Feature Summary

• Integrated USB 2.0 transceivers with dedicated transaction translators per port
• Automatic detection and switching between bus-powered and self-powered modes
• Configurable power management with individual or ganged port control
• Internal crystal driver circuit supporting 24MHz clock sources

Controllers Applications

• USB host expansion for mixed-speed peripheral connectivity
• Embedded systems requiring compact USB hub integration
• Industrial equipment utilizing SMBus configuration interfaces

Controllers Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type and temperature range. Ensure compatibility with the intended configuration method, whether using hardware strapping pins, an external SMBus host, or an I2C EEPROM for descriptor programming.

Controllers Selection Notes

Select this component when a fully compliant USB 2.0 hub with three downstream ports is required in a space-constrained design. Consider the internal 1.8V regulator and integrated termination resistors to minimize external component count. Verify that the application requires Multi-TT architecture for optimal performance with mixed-speed devices.

Controllers Part Context

This part belongs to the USB2503 family of integrated USB hubs from Microchip Technology. It serves as a complete solution for adding USB connectivity to host controllers without requiring external PHYs or complex discrete logic. The device simplifies board layout through integrated biasing and termination components.

Controllers Replacement Considerations

Check for updated revisions within the USB2503 series. Verify pinout compatibility if substituting with other 48-pin QFN USB controllers. Confirm that alternative parts support the same 1.8V core and 3.3V I/O requirements.