USB2512-AEZG - USB 2.0 2-Port Hub Controller | Microchip
MPN: USB2512-AEZG ✓ ActiveUSB2512-AEZG Overview
A USB hub controller is an interface IC within the broader USB interface-controller and USB connectivity hierarchy. It sits between a USB host and connected peripherals, coordinating enumeration, traffic routing, power management, and device attachment across downstream ports. The USB2512 belongs to Microchip's USB251x family, which uses MultiTRAK technology to support efficient USB 2.0 operation in mixed-speed device environments.
The key features of USB2512-AEZG include USB 2.0 high-speed operation, two downstream ports, 3.3 V operation, 3.3 V and port power-switch control, an internal regulator, ESD protection, and BC1.1 protocol support. These functions consolidate essential hub behavior into one interface IC while reducing the number of external support functions required around USB connectors and downstream power paths.
Technically, the device integrates USB host-to-downstream-port connectivity with low-power device-management functions. Its internal regulator supports the USB 2.0 hub implementation, while port power-switch control can coordinate downstream power states. ESD protection is valuable because USB ports are frequent mechanical entry points for electrostatic discharge. Battery-charging protocol support allows compatible devices to negotiate charging behavior over USB in suitable product designs.
Typical uses include two-port USB hubs, docking stations, printer and storage peripherals, embedded USB expanders, industrial interface equipment, and compact consumer accessories. In each application, the controller reduces system USB port count while retaining USB 2.0 compatibility and centralized downstream power management.
Designers should confirm pin assignment, crystal requirements, port-power components, and programming configuration against the manufacturer datasheet before layout release. Because the supplied data does not include a complete electrical table or pin description, unsupported details are marked for verification rather than inferred.
This page combines verified manufacturer and distributor information, package identification, feature summaries, practical application guidance, and drop-in-family comparisons that are not presented together in the manufacturer datasheet. It is intended to accelerate component selection while clearly separating verified facts from data still requiring engineering verification.
Drop-in alternatives for USB2512-AEZG — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
USB2512B-AEZG
✅ Drop-In📋 Reference alternative (not in catalog)
USB2512AI-AEZG
✅ Drop-In📋 Reference alternative (not in catalog)
USB2512B-AEZG-TR
✅ Drop-In📋 Reference alternative (not in catalog)
USB2512A-AEZG-TR
✅ Drop-In📋 Reference alternative (not in catalog)
USB2512B-AEZ-TR
✅ Drop-In📋 Reference alternative (not in catalog)
USB2512-AEZG Specifications
| Product Type | USB 2.0 high-speed 2-port hub controller |
| USB Standard | USB 2.0 |
| Number of Downstream Ports | 2 ports |
| Supply Voltage Range | 3 V to 3.6 V |
| Internal Regulator | 3.3 V |
| Port Power-Switch Control | 3.3 V |
| ESD Protection | Integrated |
| Battery-Charging Protocol | BC1.1 protocol support |
| Hub Technology | MultiTRAK |
| Package | 36-QFN (6 x 6 mm) |
| Pin Count | 36 pins |
| Mounting Type | Surface mount |
| Lead-Free Status | Lead-free |
| RoHS Status | RoHS compliant |
USB2512-AEZG 36-qfn (6 x 6 mm) Pin Configuration Guide
Pin configuration for USB2512-AEZG (36-qfn (6 x 6 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 USB2512-AEZG.
Refer to the datasheet for full pin configuration.
Typical Applications
USB2512-AEZG is suitable for 6 applications: Compact Two-Port USB Hub, USB Docking Station, Industrial USB Interface Equipment, Printer and Storage Peripheral Hub, USB Charging and Accessory Product, Embedded USB Port Expander.
Compact Two-Port USB Hub
The USB2512-AEZG fits directly into a compact USB 2.0 hub because it provides two downstream ports while operating from a 3 V to 3.6 V supply in a 36-QFN package. Its integrated 3.3 V regulator reduces the number of supporting functions required around the hub controller, while the port power-switch control helps coordinate downstream power states. Using the IC instead of discrete USB routing and support circuitry can reduce board area and simplify firmware-controlled device management. The implementation should still validate upstream connection protection, downstream connector current limits, thermal behavior, and all exposed-pad layout requirements against the complete manufacturer datasheet.
Recommended
USB Docking Station
The USB2512-AEZG is suitable for the hub section of a compact docking station that needs two USB 2.0 downstream connections. Its two-port architecture supports common peripherals such as keyboards, mice, storage, and service interfaces without adding a discrete USB switch to every socket. The integrated regulator, ESD protection, and BC1.1 protocol support are particularly useful where connector exposure and device charging behavior must be handled within a constrained enclosure. USB data routing, power-advertisement settings, and port-current budgets must be verified for the complete dock because the controller does not replace connector protection or power-conversion design.
Recommended
Industrial USB Interface Equipment
The USB2512-AEZG can serve as the USB connectivity hub in industrial interface equipment that needs to expose two USB ports to a host computer. Its USB 2.0 support and two downstream-port configuration are appropriate for control, configuration, data-acquisition, or service peripherals operating in mixed-speed environments. Integrated ESD protection adds value at externally accessible connectors, while internal regulation simplifies power planning around the 3 V to 3.6 V device supply. For industrial deployment, verify operating-temperature limits, transient immunity, grounding, and USB host-compatibility requirements; those details are not available in the supplied excerpts.
Recommended
Printer and Storage Peripheral Hub
The USB2512-AEZG can connect two USB peripherals, such as a printer and storage device, through one upstream USB interface. The USB 2.0 high-speed designation supports the intended hub-class use case, and MultiTRAK technology is designed to accommodate mixed-speed devices attached to the same controller. Port power-switch control provides a mechanism for managing downstream power states, while the internal 3.3 V regulator supports implementation of the hub electronics. Designers should confirm device enumeration behavior, available configuration memory, operating-system compatibility, and each peripheral's power requirements before release.
Recommended
USB Charging and Accessory Product
The USB2512-AEZG is appropriate for a USB accessory or charging product that combines two downstream ports with battery-charging protocol support. BC1.1 support enables the product to communicate charging capability to a compatible source, while downstream power-switch control helps coordinate port power. The 36-QFN package also conserves board area compared with many larger interface packages. Actual charging current, source-identification behavior, thermal performance, and protection requirements must be designed and validated separately; the controller's protocol support does not establish a complete USB Type-C power-delivery or charging solution.
Recommended
Embedded USB Port Expander
The USB2512-AEZG can expand one host USB connection into two downstream ports in an embedded appliance or embedded Linux system. Its 36-QFN package supports compact PCB layouts, and the two-port configuration is useful when the enclosure provides multiple service or peripheral connectors. Integrated ESD protection and port power-switch control help organize the hub interface, while the internal 3.3 V regulator simplifies rail planning. Embedded designs should verify host-driver behavior, required configuration mechanism, clocking, pin multiplexing, and exposed-pad implementation using the complete manufacturer documentation before schematic release.
Recommended
Engineering reference data for USB2512-AEZG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | USB2512B-AEZG | USB2512AI-AEZG | USB2512B-AEZG-TR | USB2512A-AEZG-TR | USB2512B-AEZ-TR |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 36-QFN (6 x 6 mm) | 36-QFN (6 x 6 mm) | 36-QFN (6 x 6 mm) | 36-QFN (6 x 6 mm) | 36-QFN (6 x 6 mm) | 36-QFN (6 x 6 mm) |
| USB Standard | USB 2.0 | USB 2.0 | USB 2.0 | USB 2.0 | USB 2.0 | USB 2.0 |
| Hub Port Count | 2 downstream ports | 2 downstream ports | 2 downstream ports | 2 downstream ports | 2 downstream ports | 2 downstream ports |
Key Differentiators
- Two-port USB 2.0 integration (vs USB2512B-AEZG)
- Integrated USB support functions (vs USB2512AI-AEZG)
- Compact 36-QFN footprint (vs USB2512B-AEZG-TR)
- Documented RoHS-compliant lead-free package (vs USB2512A-AEZG-TR)
Design Notes
Route the USB upstream and downstream differential pairs as controlled-impedance, tightly coupled traces with a continuous reference plane. Keep the USB2512-AEZG, its crystal or clock components, and decoupling network placement consistent with the manufacturer reference layout. The 36-QFN package requires thermal-via placement under the exposed pad, but the exact via pattern and pad connection must be copied from the manufacturer package drawing rather than inferred.
Design the 3 V to 3.6 V input rail and downstream power paths against the exact limits in the complete datasheet. The controller includes a 3.3 V internal regulator and port power-switch control, but the connector current budget still depends on external switch characteristics, device demand, and USB power-management rules. Validate minimum startup voltage, port-current limits, capacitor selection, and brownout behavior rather than relying only on the family-level feature summary.
ESD protection and USB connectors are external user-accessible entry points, so their placement and return-current paths should be evaluated together with the controller. Keep sensitive USB traces away from switching nodes and noisy power-conversion inductors, provide a low-impedance ground connection, and follow the manufacturer's recommended component placement. Verify every exposed-pad, crystal, VDD, VBUS, and port-power connection against the official 36-pin diagram before fabrication.
Do not assume that every USB2512 family suffix is electrically and programmatically interchangeable. The verified cross-reference material lists functional equivalents, while a separate retailer comparison warns that some legacy USB hub replacements require thorough validation and may differ in EEPROM-programming support. Check revision, configuration method, firmware defaults, clocking, and exposed-pad requirements before using an alternative on an existing board.
Compliance Information
The verified manufacturer PDF identifies the 36-pin QFN USB2512-AEZG package as lead-free and RoHS compliant. REACH, halogen-free, conflict-minerals, and automotive-qualification status are not explicitly provided in the supplied data.
