USB2642T-I/ML

Specialized Overview

The USB2642T-I/ML is a single-chip USB 2.0 compliant hub and flash media card controller combo solution manufactured by Microchip Technology. It integrates a high-speed hub with two downstream ports and a dedicated flash media reader internally attached to a third port as a USB compound device. The device supports SD, SDHC, SDXC, MMC, and eMMC formats with sustained transfer rates exceeding 35 MB/s. It features an I2C over USB bridge for controlling peripheral devices at 50 kHz. The component operates within the industrial temperature range of -40 °C to +85 °C and utilizes a 48-pin (7x7 mm²) QFN package.

Specialized Feature Summary

• Integrates a USB 2.0 hub controller with two exposed high-speed downstream ports and a dedicated flash media interface.
• Supports flexible platform designs through PortMap for port reordering and PortSwap for programmable differential-pair pin locations.
• Includes PHYBoost functionality allowing four programmable levels of USB signal drive strength to restore signal integrity.
• Provides an I2C over USB bridge enabling host control of any I2C slave device operating at a 50 kHz serial clock.

Specialized Applications

• Desktop and mobile PCs
• Monitors and televisions
• Mobile PC docking stations
• Consumer audio/video equipment
• Flash media card readers/writers

Specialized Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature grade. Ensure compatibility with system power requirements and SPI configuration needs before procurement. Confirm that the selected variant matches the intended industrial or commercial application environment specifications.

Specialized Selection Notes

Select this component when a combined USB hub and card reader solution is required to reduce board space and component count. Consider the industrial temperature range (-40 °C to +85 °C) for robust environmental operation. Evaluate the need for external SPI ROM configuration if custom vendor IDs or firmware execution from external memory is necessary for the specific product design.

Specialized Part Context

The USB2642 series represents Microchip's integrated approach to USB expansion and storage access. The 'I' suffix denotes the industrial temperature rating, while '/ML' specifies the 48-pin QFN package. This model consolidates hub logic, transaction translation, and flash media interfacing into a single silicon die, simplifying the design of multi-port USB systems with built-in card reading capabilities.

Specialized Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.

Specialized FAQ

How does the USB2642 handle port mapping and PCB layout?

The device features PortMap for flexible port mapping and disable sequencing, and PortSwap which allows programmable USB differential-pair pin locations. These features ease PCB design by aligning USB signal traces directly to connectors.

What flash media formats are supported by the USB2642?

The controller supports Secure Digital (SD), SD High Capacity (SDHC), SD Extended Capacity (SDXC), MultiMediaCard (MMC), and Embedded MultiMediaCard (eMMC) formats.

Can the USB2642 execute code from external memory?

Yes, it supports the execution of external code from an SPI Flash EEPROM. It can also configure internal code using an external SPI ROM and supports custom vendor, product, and language IDs when using an external EEPROM.