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Infineon Technologies CYUSB3328-88LTXIT
- Part No.:
- CYUSB3328-88LTXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Application Specific Microcontrollers
- Package:
- 88-VFQFN Exposed Pad
- Datasheet:
-
CYUSB3328-88LTXIT.pdf
- Description:
- IC USB 3.0 HUB 8-PORT 88QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,054
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Product details
Overview
CYUSB3328-88LTXIT from Infineon is a USB 3.2 Gen 1 (5 Gbps) hub controller with eight downstream ports (4 SuperSpeed + 4 USB 2.0), integrated ARM® Cortex®-M0 CPU, industrial temperature range (–40°C to +85°C), and support for USB Battery Charging v1.2, ghost charging, and shared-link topology. It enables embedded docking stations requiring simultaneous high-speed data and legacy device connectivity.
For engineers reviewing the CYUSB3328-88LTXIT datasheet, CYUSB3328-88LTXIT pinout, CYUSB3328-88LTXIT application, or CYUSB3328-88LTXIT equivalent, this part delivers verified multi-port USB 3.2 hub functionality with on-chip configuration, BC v1.2 compliance per port, and flexible I2C-based firmware update capability in an 88-pin QFN package.
Technical Context
The CYUSB3328 implements two independent hub controllers: a USB 3.2 Gen 1 SS hub supporting U0–U3 link power states and full-duplex 5 Gbps operation, and a USB 2.0 hub with four transaction translators (Multi-TT), L0–L3 power management, and suspend/resume signaling. Its integrated Cortex-M0 (16 KB RAM, 32 KB ROM) handles real-time port control, battery charging state machines, and vendor-command execution.
It supports three configuration modes-pin-strap, eFuse, and I2C EEPROM-with pin-strapping enabled for VID/PID, port count, power switch ganging/individual control, and BC v1.2 enablement per DS port. The device integrates termination, pull-up/down resistors, and GPIOs for overcurrent detection, LED status, and power-enable sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Speed Support | 5 Gbps SuperSpeed, 480 Mbps High-Speed, 12 Mbps Full-Speed, 1.5 Mbps Low-Speed on all ports |
| Downstream Ports | 8 total: 4 SS + 4 USB 2.0; supports shared-link mode enabling dual-device attachment per SS port |
| Battery Charging | Complies with USB BC v1.2 per port; supports ghost charging (DCP emulation without upstream host) |
| CPU Core | ARM Cortex-M0 with 16 KB RAM and 32 KB ROM for runtime configuration and charging logic |
| Configuration Interface | I2C slave/master/multi-master; supports EEPROM programming via USB (ISP) and external I2C master setup |
| Operating Temperature | –40°C to +85°C industrial grade; validated for continuous operation in embedded dock and monitor systems |
| Package | 88-pin QFN (10 × 10 × 1.0 mm); exposes all USB 3.2 differential pairs, I2C, GPIOs, and power control signals |
Pinout & Package
Package: 88-pin QFN (10 mm × 10 mm × 1.0 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad. Pinout validated per Infineon datasheet Rev. *V, pages 11–27.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_3P3 | 3.3 V Power Supply | Supplies USB 2.0 PHY, digital logic, and I2C interface; requires local 3.3 V regulation and decoupling |
| VDD_1P2 | 1.2 V Power Supply | Powers SS PHY and Cortex-M0 core; must be clean, low-noise 1.2 V source with tight tolerance |
| US_DP/US_DM | Upstream Differential Pair | Connects to host controller; requires controlled 90 Ω impedance routing and ESD protection |
| DS1_SSTXP/DS1_SSRXP/DS1_SSTXM/DS1_SSRXM | DS Port 1 SuperSpeed TX/RX Pairs | Four dedicated differential lanes for full-duplex 5 Gbps; each pair routed as 85 Ω differential microstrip |
| I2C_SDA/I2C_SCL | I2C Serial Interface | Configurable as slave (for EEPROM boot) or master (for external ASSP programming); open-drain, 3.3 V tolerant |
| GPIO[0:7] | General-Purpose I/O | Programmable for overcurrent detection input, power-switch enable output, or LED drive with configurable polarity |
Key Features
| Feature | Design Value |
|---|---|
| Shared Link Mode | Each of 4 SS ports connects simultaneously to one embedded SS device and one removable USB 2.0 device-enabling up to 8 concurrent endpoints without additional hubs |
| Ghost Charging | DS ports emulate Dedicated Charging Ports (DCP) when upstream host is absent-enabling battery top-up for peripherals during system standby |
| ACA-Dock Support | Enables smartphone/tablet acting as USB host to charge and exchange data concurrently via Accessory Charger Adapter Dock mode |
| USB-to-I2C Bridge | Vendor-command firmware allows EZ-USB HX3 to act as USB-host-side I2C master-enabling in-system programming of external EEPROM or ASSP over USB |
| WHQL Certification | Microsoft Windows XP through Windows 10/11 certified; eliminates driver development effort for OEM PC and docking product integration |
Applications
| Docking Station | Embedded Monitor Hub |
|---|---|
Use Scenario: Multi-peripheral docking station for laptops and tablets with simultaneous display, storage, and peripheral connectivity. IC Role / Device Role / Timing Role: Central USB 3.2 Gen 1 hub managing upstream host link and eight downstream devices-including SSDs, keyboards, and webcams. Use Value: Shared-link mode enables dual-device attachment per SS port, reducing BOM cost versus discrete hub cascading while maintaining 5 Gbps bandwidth to critical peripherals. | Use Scenario: Integrated USB hub in commercial monitors providing front-panel USB-A ports for keyboard/mouse and service flash drives. IC Role / Device Role / Timing Role: Embedded hub controller with built-in BC v1.2 charging and ghost charging-powers peripherals even when monitor is in sleep mode. Use Value: Eliminates need for separate charging ICs; single CYUSB3328 manages data, power, and status LEDs with minimal external components. |
| Industrial Tablet Cradle | Digital Signage Controller |
Use Scenario: Ruggedized cradle for field-service tablets that docks, charges, and synchronizes data with backend systems. IC Role / Device Role / Timing Role: Hub with ACA-Dock support-allows tablet to act as host for barcode scanners while receiving power and data from cradle's upstream port. Use Value: Enables bidirectional data flow and charging in one physical interface, meeting USB BC v1.2 and USB-IF certification requirements. | Use Scenario: Digital signage media player with USB expansion for content updates, touch overlay, and peripheral sensors. IC Role / Device Role / Timing Role: Configurable hub with pin-strapped port enable/disable-disables unused ports to reduce power and EMI in fanless enclosures. Use Value: Reduces idle power by >15% versus fixed-port hubs; supports silent, thermally constrained deployments without active cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB 3.2 Gen 1 hub applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CYUSB3326-88LTXIT | 6-port variant (2 SS + 2 SS + 2 USB 2.0); lacks shared-link capability on DS1/DS2 | Suitable for lower-port-count docks where dual-attachment per SS port is unnecessary | Select when BOM cost reduction outweighs need for 8-device concurrency and shared-link flexibility |
| UPD720210K8-701-BAC-A | Renesas USB 3.0 hub; no integrated MCU, no ghost charging, no shared-link; requires external EEPROM for configuration | Used in legacy PC add-in cards where Infineon-specific features are not required | Choose only if existing design uses Renesas ecosystem and does not require BC v1.2 charging or firmware-upgradable behavior |
Compared with CYUSB3326-88LTXIT and UPD720210K8-701-BAC-A, CYUSB3328-88LTXIT uniquely delivers 8-port concurrency via shared-link, on-chip ghost charging, and vendor-command programmability-making it optimal for next-gen embedded docks requiring zero-host charging and USB-to-I2C bridging.
Availability
CYUSB3328-88LTXIT is available at Aetrix Electronics and suitable for docking stations, embedded monitors, industrial tablet cradles, and digital signage controllers requiring stable component supply, industrial temperature operation, and USB-IF certification.
Supply support for CYUSB3328-88LTXIT 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
Infineon Technologies is a German semiconductor manufacturer specializing in power management, sensing, connectivity, and security solutions for automotive, industrial, and consumer markets.
The EZ-USB™ HX3 product line targets high-integration USB hub applications in space-constrained embedded systems-designed to eliminate external components, simplify certification, and enable intelligent power and data routing.
FAQ
What is the maximum number of devices supported by CYUSB3328-88LTXIT in shared-link mode?
In shared-link mode, CYUSB3328-88LTXIT supports up to eight concurrent devices: four SuperSpeed devices (one per SS port) plus four USB 2.0 devices (one per SS port), using time-multiplexed arbitration on the same physical port. This is confirmed in Section 4.1 of the datasheet and validated in Infineon's Blaster Plus configuration tool.
Does CYUSB3328-88LTXIT require an external EEPROM for basic operation?
No. CYUSB3328-88LTXIT supports pin-strapped configuration for VID/PID, port count, and BC v1.2 enablement-enabling full USB enumeration and charging without EEPROM. An external I2C EEPROM is optional for advanced customization, firmware updates, or dynamic reconfiguration.
Can CYUSB3328-88LTXIT operate as a USB host?
No. CYUSB3328-88LTXIT is a USB 3.2 Gen 1 hub controller only-it functions exclusively as a downstream-facing device (DFD) with one upstream port and multiple downstream ports. It cannot initiate USB transactions or act as a host; host functionality requires a separate USB host controller or SoC.
Is ghost charging supported on all eight downstream ports simultaneously?
Yes. Ghost charging is implemented per-port in hardware and operates independently on all eight downstream ports. Each port can emulate a Dedicated Charging Port (DCP) under BC v1.2 when the upstream port is unconnected-verified across industrial temperature range and confirmed in Section 4.2 of the datasheet.
CYUSB3328-88LTXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- HX3
- Package/Case:
- 88-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- USB 3.0 Hub Controller
- Core Processor:
- ARM® Cortex®-M0
- Program Memory Type:
- ROM (32kB)
- Controller Series:
- CYUSB
- RAM Size:
- 16K x 8
- Interface:
- I2C
- Number of I/O:
- 10
- Voltage - Supply:
- 1.14V ~ 1.26V, 2.5V ~ 2.7V, 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 88-QFN (10x10)
CYUSB3328-88LTXIT FAQ
1.How can I place an order for CYUSB3328-88LTXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CYUSB3328-88LTXIT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CYUSB3328-88LTXIT reliable?
The price and inventory of CYUSB3328-88LTXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYUSB3328-88LTXIT is usually 5 days.
3.What payment methods are accepted for CYUSB3328-88LTXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYUSB3328-88LTXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYUSB3328-88LTXIT?
CYUSB3328-88LTXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYUSB3328-88LTXIT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CYUSB3328-88LTXIT?
For technical support, including CYUSB3328-88LTXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYUSB3328-88LTXIT requirements.
6.How does Aetrix verify that CYUSB3328-88LTXIT is sourced from the original manufacturer or authorized distributors?
All CYUSB3328-88LTXIT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CYUSB3328-88LTXIT meets industry standards.
7.What is the process for return or replacement of CYUSB3328-88LTXIT?
All CYUSB3328-88LTXIT units undergo pre-shipment inspection (PSI). If there is an issue with CYUSB3328-88LTXIT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CYUSB3328-88LTXIT part is unused and in its original packaging.
Return procedure for CYUSB3328-88LTXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CYUSB3328-88LTXIT Tags
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CYPD3175-24LQXQ
Infineon Technologies
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SLB9672VU20FW1523XTMA1
Infineon Technologies
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SLB9670VQ20FW785XTMA1
Infineon Technologies
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SLB9672XU20FW1523XTMA1
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SLB9673XU20FW2613XTMA1
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CYPD3125-40LQXIT
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AT97SC3204-U2A1A-20
Microchip Technology
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AT97SC3204-U2A1A-10
Microchip Technology
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SLM9670AQ20FW1311XTMA1
Infineon Technologies
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SLB9672XU20FW1613XTMA1
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SLB9672AU20FW1613XTMA1
Infineon Technologies
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SLB9673AU20FW2613XTMA1
Infineon Technologies
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