USB5742BT/2GX01

Controllers Overview

The Microchip USB5742BT/2GX01 is a low-power, OEM-configurable USB 3.2 Gen 1 hub feature controller featuring two downstream ports. It supports SuperSpeed (5 Gbps), Hi-Speed (480 Mbps), Full-Speed (12 Mbps), and Low-Speed (1.5 Mbps) operations. The device integrates an embedded 8051 microcontroller with 64 KB ROM, 8 KB RAM, and 8 KB OTP memory for firmware execution. It complies with USB-IF Battery Charging Revision 1.2 standards, supporting DCP, CDP, and SDP profiles. Available in a 56-pin VQFN package, it operates within commercial (0°C to +70°C) and industrial (-40°C to +85°C) temperature ranges.

Controllers Feature Summary

• Supports USB 3.2 Gen 1 SuperSpeed alongside legacy USB 2.0 speeds with integrated termination resistors.
• Includes PortSwap, PHYBoost, and VariSense features for signal integrity optimization and differential pair configurability.
• Enables battery charging detection compliant with USB-IF BC1.2 and various proprietary charger emulation protocols.
• Allows flexible configuration via internal default settings, external SPI ROM, or One-Time Programmable (OTP) memory.

Controllers Applications

• Standalone USB Hubs
• Laptop Docks
• PC Motherboards
• Multi-function USB 3.2 Gen 1 Peripherals

Controllers Procurement Notes

Verify the specific suffix 'BT/2GX01' against the manufacturer's current ordering guide to confirm package type, temperature grade, and tape/reel specifications. Ensure compatibility with required configuration strap settings for your application design.

Controllers Selection Notes

Select this component for designs requiring a compact 2-port USB 3.2 Gen 1 solution with advanced signal integrity features like PHYBoost. Consider the integrated battery charging capabilities if powering mobile devices is a requirement. Verify that the host system supports the necessary USB protocols for optimal performance.

Controllers Part Context

The USB5742 belongs to Microchip's USB57xx series of USB hub controllers. This family provides scalable solutions for embedded applications, ranging from single-port to multi-port configurations. The USB5742 specifically targets cost-sensitive and space-constrained designs needing USB 3.2 Gen 1 compliance.

Controllers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult Microchip technical support for cross-reference information regarding alternative hub controllers with similar port counts and speed capabilities.

Controllers FAQ

How is the SPI/SMBus interface mode determined?

The interface mode is determined by the presence of pull-up resistors on the SPI_DO and SPI_CLK pins during reset. If 10 kΩ pull-ups are detected, the device configures into SMBus Slave Mode; otherwise, it defaults to SPI Mode.

What is the function of the CFG_NON_REM strap?

The CFG_NON_REM strap configures the non-removable port settings. Depending on the resistor value connected to this pin, it can designate all ports as removable, Port 1 as non-removable, or both Ports 1 and 2 as non-removable.

Does the USB5742 support Apple device charging?

Yes, the integrated battery charger detection circuitry supports most Apple devices in addition to standard USB-IF Battery Charging Revision 1.2 profiles such as DCP, CDP, and SDP.