USB2502-AEZG-TR

Controllers Overview

The USB2502-AEZG-TR is a Microchip Technology 2-port USB 2.0 hub controller compliant with the Universal Serial Bus Specification Revision 2.0. It supports Low-Speed (1.5 Mbits/s), Full-Speed (12 Mbits/s), and High-Speed (480 Mbits/s) downstream devices. The device operates on a single 3.3V supply, utilizing an internal 1.8V linear voltage regulator for core operation. It features integrated USB transceivers, termination resistors, and pull-up/pull-down components. Configuration is achieved via hardware strapping, an external I2C EEPROM, or an SMBus slave interface. The component is available in a 36-pin QFN package.

Controllers Feature Summary

• Supports dynamic power switching between self-powered and bus-powered modes based on local power availability.
• Includes Multi-Transaction Translator (Multi-TT) architecture with one transaction translator per port.
• Provides configurable Vendor ID, Product ID, and Device ID through external memory or SMBus interfaces.
• Integrates over-current sensing inputs with internal pull-up resistors and short-circuit protection.

Controllers Applications

• Embedded systems requiring expansion of USB host connectivity.
• Industrial control panels needing robust peripheral connection hubs.
• Consumer electronics devices integrating multiple USB peripherals.

Controllers Procurement Notes

Verify the specific ordering suffix to confirm the package type and tape-and-reel quantity. Ensure the selected variant matches the required PCB footprint, specifically the 36-pin QFN configuration. Confirm RoHS compliance status if environmental regulations apply to the final assembly process.

Controllers Selection Notes

Select this controller when a compact 2-port solution is required for USB 2.0 applications. Consider the internal 1.8V regulator to simplify power design compared to external regulation options. Evaluate the need for SMBus or EEPROM configuration versus fixed hardware strapping based on production volume and customization requirements.

Controllers Part Context

This component belongs to the Microchip USB250x series of USB hub controllers. It serves as a foundational building block for expanding USB connectivity in embedded designs. The series provides standardized interfaces for connecting various USB peripherals to host controllers while managing power distribution and data traffic efficiently.

Controllers Replacement Considerations

Check for pin-compatible alternatives within the same manufacturer family that may offer additional ports or updated feature sets. Verify electrical compatibility regarding voltage levels and current consumption before substituting. Ensure any replacement maintains the required USB 2.0 protocol compliance.

Controllers FAQ

How is the hub configured without an external EEPROM?

Configuration can be performed using hardware strapping options by setting the logic levels on specific pins such as CFG_SEL0, CFG_SEL1, and NON_REM during reset.

What is the function of the VBUS_DET pin?

The VBUS_DET pin monitors the upstream VBUS power state to determine when to assert the internal D+ pull-up resistor, signaling a connect event to the host.

Does the device support compound device functionality?

Yes, the hub supports compound device configurations where a port is permanently hardwired to a downstream USB peripheral device.