USB2422T-I/MJ - 2-Port USB 2.0 Hub Controller | Microchip
MPN: USB2422T-I/MJ ✓ ActiveUSB2422T-I/MJ Overview
A USB hub controller is an interface integrated circuit within the USB interface-controller category and broader semiconductor hierarchy. It manages traffic between one upstream USB port and multiple downstream ports, providing device attachment, enumeration, power management, and transaction handling. USB 2.0 hubs can operate at Hi-Speed, Full-Speed, or Low-Speed, allowing one embedded platform to support peripherals with different transfer capabilities while maintaining backward compatibility.
The USB2422 uses a single transaction translator rather than the multiple-port implementation associated with larger hub controllers. Its principal benefits are low power consumption, a compact 24-QFN footprint, and integration for two downstream USB ports. The verified distributor information identifies the device as a low-pin-count, two-port USB 2.0 Hi-Speed hub controller. Tape-and-reel ordering is indicated by the /MJ package suffix, while the /I suffix identifies the orderable grade.
The controller can attach to an upstream port as a Hi-Speed and Full-Speed hub or as a Full-Speed-only hub. When used in Hi-Speed mode, downstream Low-Speed, Full-Speed, and Hi-Speed devices are supported. This flexibility lets one board design accommodate different host-controller capabilities and peripheral populations. The operating range of 3 V to 3.6 V also allows integration with conventional 3.3 V embedded USB power rails.
Typical uses include compact industrial equipment, USB-to-serial bridges, data-acquisition equipment, set-top boxes, printers, and embedded computing platforms requiring two USB connections. The hub is also appropriate where an embedded host must expose multiple USB peripherals while conserving board area. Because the USB2422 is a hub controller rather than a general-purpose host controller, the upstream system must provide the USB host interface and the required software support.
PCB implementation requires careful high-speed signal routing, controlled impedance, short differential traces, solid ground-plane continuity, and compliant USB connector and protection implementation. Decoupling should be placed close to the supply pins, while differential pairs should remain continuously referenced to an uninterrupted ground plane. The exposed-pad thermal and electrical requirements should follow the manufacturer land pattern and PCB stack-up guidance.
This page combines the verified manufacturer and distributor information with practical USB layout guidance, comparison data, sourcing answers, and design considerations. Exact pin assignments, electrical limits, host-interface timing, and pricing details require confirmation in the current Microchip datasheet and authorized distributor listings.
Drop-in alternatives for USB2422T-I/MJ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with USB2422T-I/MJ (same form factor and footprint) — differing in Product Type, Supported Downstream Speeds, Package, Transaction Translator.
USB2422-I/MJ
✅ Drop-InContact for price
View Datasheet →USB2422T-I/MJ Specifications
| Product Type | 2-port USB 2.0 hub controller |
| USB Version | USB 2.0 |
| Number of Downstream Ports | 2 ports |
| Upstream Configuration | Hi-Speed and Full-Speed hub or Full-Speed-only hub |
| Supported Downstream Speeds | Low-Speed, Full-Speed, and Hi-Speed when configured as a Hi-Speed hub |
| Transaction Translator | 1 single transaction translator |
| Supply Voltage Range | 3 V to 3.6 V |
| Low-Power Design | Low-power embedded USB hub controller |
| Package Type | 24-QFN (4 x 4 mm) |
| Package Height | 0.9 mm |
| Number of Pins | 24 pins |
| Mounting Type | Surface mount |
| Shipping Format | Tape and reel |
USB2422T-I/MJ 0.9 mm Pin Configuration Guide
Pin configuration for USB2422T-I/MJ (0.9 mm package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for USB2422T-I/MJ.
Refer to the datasheet for full pin configuration.
Typical Applications
USB2422T-I/MJ is suitable for 6 applications: Compact Embedded USB Hub, Industrial Data-Acquisition Equipment, USB-to-Serial Bridge Expansion, Embedded Set-Top and Media Accessories, USB-Accessible Printers and Peripherals, Low-Power Portable USB Expansion.
Compact Embedded USB Hub
The USB2422T-I/MJ fits an embedded host that must expand one upstream USB connection into two downstream ports without using a larger multi-port controller. Its documented low-power design, 3 V to 3.6 V operating range, and support for a Hi-Speed and Full-Speed upstream connection provide a practical basis for embedded equipment with mixed peripheral speeds. The implementation places the controller between the host controller and two USB Type-A or Type-B connector routes, then uses host software to enumerate the attached devices. Because the two downstream ports share the upstream bus, sustained 480 Mbit/s operation on both ports simultaneously is not expected. The primary design benefit is functional integration and compact 24-QFN footprint rather than additional bandwidth.
Recommended
Industrial Data-Acquisition Equipment
USB2422T-I/MJ is suitable for data-acquisition and test equipment where multiple USB instruments must connect to one embedded host. The controller supports Low-Speed, Full-Speed, and Hi-Speed downstream devices when configured for Hi-Speed operation, allowing measurement accessories and service interfaces with different transfer capabilities to coexist on one host controller. Its two-port topology keeps the implementation smaller than a large external hub. Layout should preserve controlled-impedance USB routing, provide connector protection, and separate noisy switching-converter energy from the differential pairs. Firmware must handle shared upstream bandwidth, hot-plug events, device classes, and the practical aggregate throughput limit when both ports operate simultaneously.
Recommended
USB-to-Serial Bridge Expansion
The USB2422T-I/MJ can support an embedded conversion system that exposes two downstream USB connections for serial adapters, programmers, or service interfaces. Its 24-QFN package preserves PCB area in compact industrial products, while the two downstream ports allow one host connection to replace separate root-hub ports. A bridge such as the CP2102N family may sit downstream as a USB-to-UART device, with the USB2422 handling attachment and transaction routing. The design must budget cable-drop effects, connector shielding, ESD protection, and the current required by attached devices. USB bus power limits should be enforced independently for each port rather than assuming that two attached devices can draw unrestricted current simultaneously.
Recommended
Embedded Set-Top and Media Accessories
USB2422T-I/MJ is appropriate for set-top boxes and media accessories that need a controlled two-port USB interface for keyboards, storage, service tools, or low-bandwidth peripherals. Its low-power hub architecture is useful where an embedded processor exposes only one host USB interface or where a simple two-port hub is preferable to a larger external accessory. Hi-Speed, Full-Speed, and Low-Speed downstream support provides backward compatibility across different peripheral classes. Firmware should include stable device addresses and enumeration handling, while PCB routing should maintain a continuous reference plane and place ESD protection close to external connectors. Shared upstream bandwidth means that simultaneous storage and high-rate peripherals may reduce one another’s throughput.
Recommended
USB-Accessible Printers and Peripherals
The USB2422T-I/MJ can sit between an embedded Linux or real-time-control host and two USB peripherals such as printers, scanners, storage devices, or configuration adapters. Its two downstream ports reduce the need for an external powered hub while preserving support for devices operating at different USB speeds. The controller does not itself create print or storage functionality; device-class software and the appropriate USB driver must be present on the upstream host. Deployment should include overload protection at the USB power branch, proper enumeration scripts, and a defined policy for simultaneous high-speed transfers. Cable and connector selection remain important because long or poorly shielded runs can reduce reliability independently of the controller.
Recommended
Low-Power Portable USB Expansion
USB2422T-I/MJ fits portable equipment that needs two downstream USB connections from a single embedded host interface. Its documented low-power design is valuable when system energy is constrained, and its 3 V to 3.6 V supply range supports conventional embedded 3.3 V power architecture. The controller can connect Low-Speed peripherals such as input devices as well as Full-Speed or Hi-Speed storage and communications accessories when operating in Hi-Speed mode. Designers should calculate the overall platform energy budget, disable unused ports where the supported configuration permits it, and apply a conservative USB power budget. Battery-operated equipment must also account for cable loss and the distinction between bus-powered and externally powered downstream devices.
Recommended
Recommended Products Summary
Engineering reference data for USB2422T-I/MJ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | USB2422-I/MJ |
|---|---|---|
| Package | 24-QFN (4 x 4 mm) | 24-QFN (4 x 4 mm) |
| Brand | Microchip Technology | Microchip Technology |
| Product Type | 2-port USB 2.0 hub controller | USB interface hub controller |
| USB Version | USB 2.0 | USB 2.0 |
| Number of Pins | 24 pins | 24 pins |
| Mounting Type | Surface mount | Surface mount |
| Unit Price | Quotation required as of 2026-10-28 | Quotation required as of 2026-10-28 |
Key Differentiators
- Purpose-built two-port embedded USB hub integration (vs USB2422-I/MJ)
- Single transaction translator for a two-port design (vs USB2422-I/MJ)
- Mixed-speed downstream-device support (vs USB2422-I/MJ)
Design Notes
Route all USB differential pairs as short, continuous, impedance-controlled 90-ohm pairs with symmetrical geometry and no branch stubs. Keep the upstream connection and both downstream connections referenced to a continuous ground plane, avoid crossing plane boundaries, and follow the Microchip USB2422 reference layout. Place ESD protection at the external connector rather than near the controller so surge current does not pass through sensitive device traces. Connector and routing geometry should also account for the USB 2.0 cable and enclosure environment.
Place the required bypass capacitors at the USB2422T-I/MJ supply pins and connect the exposed pad using the manufacturer land pattern. Provide clean 3 V to 3.6 V power with local decoupling, control switching-node coupling, and adequate current capacity for the hub controller and downstream bus-power requirements. Do not treat downstream port current as automatically available: budget each USB power branch independently and implement protection consistent with the applicable USB source and product safety requirements.
Do not substitute a functionally similar USB hub controller solely because its port count and USB version appear similar. The verified cross-reference results do not establish the package, pinout, electrical limits, transaction-translator implementation, or register compatibility of other manufacturers. A true drop-in decision requires the same 24-QFN footprint, pin-for-pin mapping, signal levels, timing, power pins, and exposed-pad connection. For USB2422-I/MJ, confirm the non-T grade and qualification requirements before approving it in place of USB2422T-I/MJ.
Compliance Information
The supplied distributor snippets do not provide definitive component-level RoHS, REACH, lead-free, halogen-free, or conflict-minerals statements for this exact MPN. A generic Mouser search result mentions RoHS-compliant products, but it is insufficient for definitive extraction. Automotive qualification is not indicated by the available data.
