Micron USB5537B‑5000AKZE – 7‑Port USB 3.0 SuperSpeed Hub Controller

Overview

The USB5537B‑5000AKZE (formerly under Microchip) is a 7‑port USB 3.0 SuperSpeed hub controller in a 72‑pin exposed‑pad QFN package. Although now obsolete, it remains popular due to wide industry support and mature firmware libraries .https://www.horsway.com/productdetail/evb-usb5537

 Key Features

• USB 3.0 & 2.0 Support: Provides 4 SuperSpeed (5 Gbps) and 3 USB 2.0 ports, with parallel data flow so HS traffic doesn’t impact SS .

• Low-Power Design: Ideal for battery-packaged products and embedded systems .

• Built-in Resistors: Includes termination, pull-up/pull-down resistors and over-current sense on downstream ports.

• Flexible Configuration: Customizable via on-chip One-Time-Programmable (OTP) ROM, external SPI ROM, or SMBus for vendor/product IDs, unit enable/disable per port, and charging support.

• Battery Charging Compliance: Handles Charging Downstream Port (CDP), Dedicated Charging Port (DCP), and legacy modes.

• Dynamic Signal Tuning: MultiTRAK™ translator ensures consistent USB 2.0 throughput; PHYBoost allows signal integrity adjustment.https://www.horsway.com/productdetail/evb-usb5537

 Electrical & Mechanical Specs

• Data Rates: SuperSpeed 5 Gbps; High/Full/Low USB 480/12/1.5 Mbps.

• Voltage Supply: 1.25 V core; 3.3 V I/O.

• Operating Temp: 0 °C to +70 °C (commercial grade); industrial available via variant.

• Package: 72‑pin VFQFN exposed pad, 10 × 10 mm, for good thermal performance.

 Application Use Cases

• Docking Stations & Port Replicators: Expand a limited host port into 4×USB3 + 3×USB2.

• Embedded & Set-Top Boxes: SuperSpeed connectivity for media storage and peripherals.

• Industrial Hubs: Configurable overcurrent/port enable makes it robust for custom depth.

• Battery-Powered Devices: Low-power idle modes and port charging make it practical for portable hubs.

 Design Tips

• Use manufacturer's PCB thermal footprint for optimal pad planning .

• Provide stable 1.25 V core and 3.3 V I/O rails with adequate decoupling.

• Integrate EMI filters on SuperSpeed port traces due to high data rates.

• Follow Microchip examples for OTP programming or SPI/SMBus configuration if customizing device ID or port behavior.

 Summary

The USB5537B‑5000AKZE is a once-popular 7-port USB 3.0 hub controller offering SuperSpeed support, low power consumption, flexible configuration, and battery-friendly features. Though now obsolete, it continues to appear in legacy designs; new designs should consider the updated USB5537B‑6080AKZE. Its combination of performance and programmability made it a favorite in docking station, industrial, and embedded USB hub applications.https://www.horsway.com/productdetail/evb-usb5537