Infineon Technologies CYUSB3324-BVXAT

Overview

CYUSB3324-BVXAT from Cypress Semiconductor is a USB 3.0 hub controller supporting four SuperSpeed (5 Gbps) downstream ports with full backward compatibility to Hi-Speed (480 Mbps), Full-Speed (12 Mbps), and Low-Speed (1.5 Mbps). It integrates ARM Cortex-M0 CPU (16 KB RAM, 32 KB ROM), Shared Link™ for embedded SS + USB 2.0 port splitting, Ghost Charge™ for DCP emulation during host disconnection, and BC v1.2-compliant charging on all DS ports - deployed in docking stations and embedded motherboards.

For engineers reviewing the CYUSB3324-BVXAT datasheet, CYUSB3324-BVXAT pinout, CYUSB3324-BVXAT application, or CYUSB3324-BVXAT equivalent, key selection criteria include SS/USB 2.0 dual-link power management (U0–U3/L0–L3), pin-strappable configuration of VID/PID, per-port charging enable, ganged/individual power switch control, and I2C-based firmware upgrade capability via vendor commands.

Technical Context

HX3 architecture comprises two independent controllers: a USB 3.0 SS hub supporting U0–U3 link states and full-duplex 5 Gbps operation, and a USB 2.0 hub with four dedicated transaction translators (Multi-TT), L0–L3 power states, and suspend/resume signaling. The integrated Cortex-M0 executes real-time battery charging logic, GPIO configuration for overcurrent detection and LED control, and vendor-command processing.

Shared Link™ enables one physical DS port to concurrently serve an embedded SuperSpeed device (e.g., camera) and a removable USB 2.0 peripheral by separating SSRxP/M and SSTxP/M from DP/DM paths, requiring dual VBUS control signals (DSx_VBUSEN_SL and DSx_PWREN). Ghost Charge™ activates automatically upon US port disconnection to emulate DCP using DP/DM shorting per BC v1.2.

Key Specifications

Pinout & Package

Package: 88-pin QFN (10 × 10 × 1.0 mm), RoHS-compliant, industrial temperature grade.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB 3.0 hub controller applications.

Compared with TUSB8041A and VL813-Q4, CYUSB3324-BVXAT delivers unique value in embedded systems requiring autonomous charging behavior, flexible port topology via Shared Link™, and in-system firmware upgradability - reducing bill-of-materials and enabling field-deployable feature enhancements.

Availability

CYUSB3324-BVXAT is available at Aetrix Electronics and suitable for desktop docking stations, embedded notebook motherboards, industrial tablet cradles, and digital signage media players requiring stable component supply, industrial temperature operation, and long-term lifecycle support.

Supply support for CYUSB3324-BVXAT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Cypress Semiconductor (now part of Infineon Technologies) designs high-performance mixed-signal ICs for USB connectivity, PSoC programmable systems, and automotive-grade interfaces.

CYUSB3324-BVXAT belongs to the HX3 USB 3.0 hub controller family, engineered specifically for space-constrained embedded systems needing intelligent power delivery, multi-protocol port expansion, and firmware-upgradable USB subsystems.

FAQ

Does CYUSB3324-BVXAT require an external crystal?

Yes - it requires a 26 MHz fundamental-mode crystal connected to XIN/XOUT pins. The internal PLL generates all required clocks including 125 MHz for USB 3.0 and 48 MHz for USB 2.0. Load capacitance must be 12 pF; tolerance ≤ ±50 ppm is recommended for USB-IF certification compliance.

Can Shared Link™ be disabled per port?

No - Shared Link™ is enabled globally via pin-strap configuration (SL_EN pin) and applies uniformly to all downstream ports. When active, each DS port's USB 2.0 and SS paths are decoupled; disabling Shared Link™ reverts all ports to standard USB 3.0 hub operation with no SS/USB 2.0 splitting.

What is the maximum sustained power dissipation for CYUSB3324-BVXAT in 88-QFN package?

At full load (four DS ports active at 5 Gbps + USB 2.0), typical power consumption is 1.28 W at 3.3 V supply. The 88-QFN package supports up to 1.5 W continuous dissipation under industrial ambient conditions (85 °C) with 2-layer PCB and 1 oz copper, per Thermal Characteristics Table 12 in datasheet 001-73643 Rev. *T.

Is Windows driver support included out-of-the-box?

Yes - CYUSB3324-BVXAT is Microsoft WHQL-certified for Windows XP through Windows 10 (x86/x64), with inbox drivers delivering plug-and-play enumeration. No custom INF files or vendor software installation is required for basic hub functionality; Blaster Plus tool is optional for advanced configuration.