USB2512B-AEZG-TR - 2-Port USB 2.0 Hub Controller | Microchip (Tape & Reel)
MPN: USB2512B-AEZG-TR ✓ ActiveUSB2512B-AEZG-TR Overview
A USB hub controller is an interface integrated circuit that expands one host USB connection into multiple downstream ports. The hub-controller category belongs to the USB interface IC family, which connects USB physical data lines to an embedded system and manages enumeration, port power, transaction translation, and device attachment. A two-port controller is especially useful when a product needs more peripheral connections without adding a full-size host controller or external discrete hub circuitry.
The USB2512B-AEZG-TR provides two USB 2.0 downstream ports, low-speed, full-speed, and high-speed transaction support, and a 3.3 V-class operating supply range of 3 V to 3.6 V. Its configurable MultiTRAK architecture is intended to improve power efficiency in systems where not every downstream device requires continuous maximum-rate operation. Configuration access through I2C EEPROM and SMBus allows firmware or production equipment to control hub behavior without requiring a separate complex external controller.
Communication with the hub is handled through its USB 2.0 interface and serial configuration interfaces. The 36-QFN package provides a compact surface-mount footprint for embedded consumer, mobile, and portable equipment. The listed commercial-temperature operating range is 0 to 70 C, making the part suitable for indoor consumer and mobile products where that temperature range is sufficient.
Typical uses include tablet and mobile-device USB expansion, docking accessories, portable media equipment, and embedded systems that need two downstream USB connections. The controller can reduce connector-count pressure in compact designs while retaining high-speed USB 2.0 operation. System designers should account for the USB connection limits of the upstream host, cable routing, ESD protection, and the power budget of both downstream ports.
Use the manufacturer datasheet and USB2512B QFN schematic checklist when assigning every pin and checking required support components. In particular, preserve the VBUS_DET behavior described by Microchip so the host can detect bus state and force a hub reset through VBUS toggling where required.
This product overview combines the device specifications, documented design resources, procurement considerations, and practical integration guidance. It is organized for engineers who need a concise technical basis for schematic review, PCB planning, firmware configuration, and footprint-compatible replacement decisions.
Drop-in alternatives for USB2512B-AEZG-TR — 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 USB2512B-AEZG-TR (same form factor and footprint) — differing in Number of Downstream Ports, Package, Product Type, RoHS Status, USB Standard.
USB2512-AEZG
✅ Drop-InContact for price
View Datasheet →USB2512BI-AEZG
✅ Drop-InContact for price
View Datasheet →USB2512B-AEZG-BYC
✅ Drop-In📋 Reference alternative (not in catalog)
USB2513B-AEZC
✅ Drop-InContact for price
View Datasheet →USB2512B-AEZG-TR Specifications
| Product Type | USB 2.0 hub controller |
| Number of USB Ports | 2 ports |
| USB Standard | USB 2.0 |
| Maximum USB Data Rate | 480 Mbps |
| Supported USB Speeds | Low-speed, full-speed, and high-speed |
| Supply Voltage Range | 3 V to 3.6 V |
| Nominal Supply Voltage | 3.3 V |
| Configuration Interface | I2C EEPROM and SMBus |
| Transaction Translator | MultiTRAK configurable MTT |
| Operating Temperature Range | 0 C to 70 C |
| Package Type | 36-QFN |
| Package Dimensions | 6 x 6 mm |
| Package Pitch | 0.50 mm |
| Mounting Type | Surface mount |
| RoHS Status | Compliant |
| Number of Pins | 36 pins |
| Exposed Thermal Pad | Present |
USB2512B-AEZG-TR 0.50 mm Pin Configuration Guide
Pin configuration for USB2512B-AEZG-TR (0.50 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 USB2512B-AEZG-TR.
Refer to the datasheet for full pin configuration.
Typical Applications
USB2512B-AEZG-TR is suitable for 6 applications: Mobile Device USB Expansion, Tablet Docking Accessory, Consumer Media Hub, Industrial Data Acquisition Unit, Portable Diagnostic Equipment, Embedded USB Peripheral Hub.
Mobile Device USB Expansion
The USB2512B-AEZG-TR fits mobile accessories that need two downstream USB connections while preserving full-speed, low-speed, and high-speed device support. Its 2-port USB 2.0 architecture operates at up to 480 Mbps from a 3 V to 3.6 V supply, while the 36-QFN package limits board area in compact products. Place the controller between the upstream host interface and the two downstream connectors, then verify current budget, connector protection, and firmware enumeration behavior in the final device.
Recommended
Tablet Docking Accessory
A tablet dock can use the USB2512B-AEZG-TR to expand one upstream USB 2.0 connection into two downstream ports without implementing hub transaction handling in discrete logic. The device supports a mix of low-speed, full-speed, and high-speed peripherals, up to 480 Mbps, and the configurable MultiTRAK architecture helps match port behavior to the workload. The 6 x 6 mm QFN package leaves space for connectors and protection components in a compact dock PCB.
Recommended
Consumer Media Hub
The USB2512B-AEZG-TR is suitable for consumer media systems that need two USB connections for accessories, storage, or wired control. USB 2.0 high-speed operation supports data rates up to 480 Mbps, while configurable MultiTRAK behavior can accommodate mixed-speed devices in one hub. Use the I2C EEPROM or SMBus configuration path to establish port behavior during startup, and validate power management for externally powered accessories as well as bus-powered devices.
Recommended
Industrial Data Acquisition Unit
Industrial measurement equipment can add two USB ports for sensors, service interfaces, or configuration adapters using the USB2512B-AEZG-TR. The controller's 0 to 70 C operating range fits many indoor industrial environments, and its mixed-speed support allows low-speed control peripherals alongside full-speed or high-speed data devices. Because industrial cabinets may exceed the specified ambient range, evaluate thermal margins and use a current temperature rating or system-level cooling when required.
Recommended
Portable Diagnostic Equipment
Portable diagnostic instruments benefit from the USB2512B-AEZG-TR when they need to expose two service ports while maintaining USB 2.0 compatibility. Its low-power 3.3 V operating class and configurable mixed-speed transaction handling suit embedded instrumentation, while the small QFN package supports dense portable layouts. Engineers should account for ESD exposure, field-accessible connector cables, host-power limits, and enclosure temperatures before releasing the production design.
Recommended
Embedded USB Peripheral Hub
The USB2512B-AEZG-TR can serve as the central USB 2.0 hub in an embedded peripheral platform with two downstream connections. Supporting low-speed, full-speed, and high-speed devices makes it practical for mixed peripherals such as control interfaces, mass storage, and diagnostic adapters. Its I2C EEPROM and SMBus interfaces support configuration, while the manufacturer schematic checklist helps verify the VBUS_DET connection and other hub-specific implementation requirements.
Recommended
Recommended Products Summary
Engineering reference data for USB2512B-AEZG-TR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | USB2512-AEZG | USB2512BI-AEZG | USB2512B-AEZG-TR-TR | USB2512B-AEZG-TR-BYC | USB2513B-AEZC |
|---|---|---|---|---|---|---|
| Package | 36-QFN (6x6) | 36-QFN (6x6) | 36-QFN (6x6) | 36-QFN (6x6) | 36-QFN (6x6) | 36-QFN (6x6) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Product Type | 2-port USB 2.0 hub controller | 2-port USB 2.0 hub controller | 2-port USB 2.0 hub controller | 2-port USB 2.0 hub controller | 2-port USB 2.0 hub controller | 3-port USB 2.0 hub controller |
| USB Standard | USB 2.0 | USB 2.0 | USB 2.0 | USB 2.0 | USB 2.0 | USB 2.0 |
| Maximum USB Data Rate | 480 Mbps | 480 Mbps | 480 Mbps | 480 Mbps | 480 Mbps | 480 Mbps |
| Number of Downstream Ports | 2 | 2 | 2 | 2 | 2 | 3 |
Key Differentiators
- Newer configurable mixed-speed hub architecture (vs USB2512-AEZG)
- Two-port function in a compact 6 x 6 mm package (vs USB2513B-AEZC)
- I2C EEPROM and SMBus configuration support (vs USB2512-AEZG)
Design Notes
Follow the USB2512B 36-QFN schematic checklist and recommended layout for pin escape routing, exposed-pad thermal vias, and high-speed USB differential pairs. Keep the upstream and downstream differential routes impedance-controlled, avoid unnecessary stubs, and provide a continuous ground reference beneath the exposed pad. Verify connector and ESD-component placement so surge-current paths do not cross sensitive data traces.
Design the 3 V to 3.6 V supply with local high-frequency bypass and verify the current available to the hub and all downstream loads. The part-level information does not establish the exact downstream-current limits, so obtain those values from the manufacturer datasheet before setting a load budget. Account for inrush, externally powered devices, and the difference between bus-powered and self-powered downstream ports.
Do not tie VBUS_DET blindly to 3.3 V without understanding the consequence. Microchip states that tying it directly to 3.3 V is possible but not recommended because the host can no longer use VBUS toggling to force a soft hub reset and reconnection. Implement the recommended detection arrangement so reset behavior remains available when the finished product requires it.
Place configuration memory and its pull-up or pull-down network according to the manufacturer reference circuit, and keep the I2C and SMBus traces away from the USB differential pairs where practical. Confirm signal levels against the 3.3 V supply range and review unused pins in the manufacturer pin-description table. Do not infer connectivity from the 36-QFN outline because exposed-pad and no-connect treatment must match the exact datasheet revision.
Compliance Information
RoHS compliance is stated in the component specification. Formal lead-free, halogen-free, REACH, and conflict-minerals declarations were not established by the manufacturer page included in the product information.
