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Infineon Technologies CYUSB3328-88LTXI
- Part No.:
- CYUSB3328-88LTXI
- Manufacturer:
- Infineon Technologies
- Category:
- Application Specific Microcontrollers
- Package:
- 88-VFQFN Exposed Pad
- Datasheet:
-
CYUSB3328-88LTXI.pdf
- Description:
- IC USB 3.0 HUB 8-PORT 88QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,491
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Product details
Overview
CYUSB3328-88LTXI 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 CYUSB3328-88LTXI datasheet, CYUSB3328-88LTXI pinout, CYUSB3328-88LTXI application, or CYUSB3328-88LTXI equivalent, key selection criteria include SS/USB2.0 port count allocation, shared-link configuration capability, BC v1.2 compliance per port, I2C-based firmware upgrade path, and 88-pin QFN thermal and routing constraints.
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 HS/FS/LS compatibility. Its port controller handles BC v1.2 DCP emulation and ACA-Dock mode for host-less charging.
The embedded ARM® Cortex®-M0 subsystem (16 KB RAM, 32 KB ROM) executes runtime configuration, shared-link arbitration, battery charging state machines, and vendor-command processing-including USB-to-I2C bridging for external ASSP firmware updates via the upstream port.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Downstream Ports | 8 total: 4 × SS (5 Gbps) + 4 × USB 2.0 (480 Mbps), enabling mixed-speed peripheral aggregation |
| Shared Link Support | 4 DS ports configured as shared-link-each connects one SS device and one USB 2.0 device simultaneously |
| Battery Charging | Complies with USB BC v1.2 on all 8 ports; supports ghost charging (DCP emulation without upstream host) |
| CPU Core | ARM® Cortex®-M0 @ up to 48 MHz, 16 KB RAM, 32 KB ROM for real-time port control and firmware upgrades |
| Package | 88-pin QFN (10 × 10 × 1.0 mm), industrial-grade (–40°C to +85°C), with exposed thermal pad |
| I2C Interface | Configurable as master/slave/multi-master; supports EEPROM programming and external ASSP firmware update over USB |
| Configuration Modes | Pin-straps, eFuse, or I2C EEPROM-enables VID/PID, port enable/disable, power switch ganging, and DP/DM swap |
Pinout & Package
Package: 88-pin QFN (10 mm × 10 mm × 1.0 mm), thermally enhanced with exposed paddle. Pin pitch: 0.5 mm. RoHS-compliant, halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_3P3 | 3.3 V Power Supply | Supplies USB 2.0 PHY, I/Os, and digital logic; requires local 3.3 V regulation and decoupling |
| VDD_1P2 | 1.2 V Power Supply | Supplies SS PHY and core logic; 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 differential impedance and ESD protection |
| DS1_SSTXP / DS1_SSRXP / DS1_SSTXM / DS1_SSRXM | DS Port 1 SuperSpeed TX/RX | Full-duplex 5 Gbps lanes; each pair routed as 85 Ω differential microstrip with length matching ≤ 5 mil |
| DS1_DP / DS1_DM | DS Port 1 USB 2.0 Differential Pair | HS/FS/LS signaling; 90 Ω differential impedance; internal termination enabled by default |
| I2C_SDA / I2C_SCL | I2C Interface Signals | Supports configuration loading, EEPROM ISP, and vendor-command bridge; pull-up required externally |
| GPIO[0:7] | Configurable General-Purpose I/O | Programmable for overcurrent detection, LED drive, power switch control, or custom status signaling |
Key Features
| Feature | Design Value |
|---|---|
| Shared-link architecture | Enables dual-device attachment per DS port (1 SS + 1 USB 2.0), doubling effective port density in space-constrained embedded systems |
| Ghost charging | Delivers 5 V/1.5 A DCP-level charging to connected devices even when upstream host is absent-critical for kiosk and dock applications |
| USB-to-I2C vendor command | Allows host-side firmware update of external ASSPs (e.g., display controllers, sensor hubs) without additional bridges or firmware loaders |
| ACA-Dock support | Enables smartphone/tablet acting as USB host to simultaneously charge and exchange data-required for mobile accessory docks compliant with BC v1.2 |
| Pin-strapped configuration | Eliminates need for external EEPROM in cost-sensitive designs; supports VID/PID, port count, power switch polarity, and charging enable per port |
Applications
| Embedded Docking Station | Industrial Monitor Hub |
|---|---|
|
Use Scenario: Compact docking station for field-deployed tablets with multiple peripherals including SSD, keyboard, and barcode scanner. IC Role / Device Role / Timing Role: Central USB hub managing concurrent 5 Gbps SSD transfers and USB 2.0 HID/data traffic while maintaining BC v1.2 charging during host disconnection. Use Value: Shared-link mode allows single physical port to serve both high-bandwidth storage and low-speed input devices-reducing PCB layer count and connector cost. |
Use Scenario: Touchscreen monitor with integrated USB hub for connecting camera, audio interface, and service port in factory automation. IC Role / Device Role / Timing Role: USB 3.2 Gen 1 hub providing deterministic latency for real-time camera streaming (SS) and guaranteed bandwidth for HID feedback (USB 2.0). Use Value: Industrial temperature rating (–40°C to +85°C) and robust ESD performance ensure reliable operation in uncontrolled factory environments. |
| Medical Handheld Cradle | Digital Signage Media Player |
|
Use Scenario: Sterilizable cradle for medical tablets that charges the device and synchronizes patient data via USB while docked. IC Role / Device Role / Timing Role: Ghost charging controller delivering regulated 5 V/1.5 A to tablet battery; USB 2.0 path handles encrypted data sync during charging. Use Value: Eliminates need for separate charging IC and data controller-reducing BOM count and improving system-level safety certification path. |
Use Scenario: Outdoor digital signage player requiring USB-connected storage, Wi-Fi adapter, and remote diagnostics port. IC Role / Device Role / Timing Role: Hub with dedicated Multi-TT per port ensures independent bandwidth allocation for concurrent 4K video playback (SS), firmware OTA (USB 2.0), and debug logging (USB 2.0). Use Value: Pin-strap configuration enables fixed-function deployment without software initialization-accelerating boot time and reducing firmware complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB 3.2 Gen 1 hub controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CYUSB3326-88LTXI | 6-port variant (2 SS + 2 SS + 2 USB 2.0); no shared-link support; same 88-QFN package and industrial temp grade | Suitable for simpler docking where only six peripherals are needed and shared-link is unnecessary | Select when port count and feature set can be reduced to lower cost and simplify layout |
| CYUSB3314-88LTXI | 4-port (4 SS), no shared-link or ghost charging; supports pin-straps and I2C but lacks ACA-Dock and multi-mode charging logic | Targeted at pure data aggregation hubs without charging requirements | Choose when BC v1.2, ghost charging, and ACA-Dock are not required-reduces firmware overhead and validation scope |
Compared with CYUSB3326-88LTXI and CYUSB3314-88LTXI, CYUSB3328-88LTXI uniquely delivers 4 shared-link ports and full BC v1.2 ghost charging across all 8 ports-making it the only option for space-constrained embedded docks needing simultaneous high-speed and legacy peripheral support with host-independent power delivery.
Availability
CYUSB3328-88LTXI is available at Aetrix Electronics and suitable for embedded docking stations, industrial monitors, medical handheld cradles, and digital signage media players requiring stable component supply, long lifecycle support, and industrial temperature operation.
Supply support for CYUSB3328-88LTXI 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 IoT markets.
CYUSB3328 belongs to the EZ-USB™ HX3 family-designed specifically for embedded USB hub applications demanding mixed-speed connectivity, intelligent power delivery, and firmware-upgradable intelligence in compact form factors.
FAQ
Does CYUSB3328-88LTXI require an external EEPROM for basic operation?
No. Basic functionality-including port enumeration, BC v1.2 charging, and USB 2.0/SS link training-is enabled via pin-straps. An external I2C EEPROM is optional and used only for advanced features like custom string descriptors, dynamic configuration changes, or vendor-command firmware updates for external ASSPs.
What is the maximum sustained power dissipation for CYUSB3328-88LTXI in the 88-pin QFN package?
At full 8-port load with all ports active at 5 Gbps and USB 2.0, typical power consumption is 1.25 W (VDD_3P3: 0.85 W, VDD_1P2: 0.4 W). The 88-QFN package is rated for continuous operation up to 1.5 W with proper PCB thermal design (≥4 thermal vias under exposed pad, 2 oz copper).
Can CYUSB3328-88LTXI support Apple MFi charging protocols?
Yes. All eight downstream ports support Apple charging protocols (including 2.4 A DCP mode) as part of its USB BC v1.2 compliance. This is implemented in hardware and does not require host-side driver intervention or firmware modification.
Is the ARM® Cortex®-M0 firmware accessible or modifiable by end users?
Infineon provides the Blaster Plus configuration tool and documented vendor commands for runtime parameter updates, but the core M0 firmware image is locked and not user-modifiable. Customers may extend functionality via I2C-based vendor commands and GPIO-controlled logic, but cannot reprogram the M0's ROM or alter USB protocol stack behavior.
CYUSB3328-88LTXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- HX3
- Package/Case:
- 88-VFQFN Exposed Pad
- Packaging:
- Tray
- 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)
CYUSB3328-88LTXI FAQ
1.How can I place an order for CYUSB3328-88LTXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CYUSB3328-88LTXI 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 CYUSB3328-88LTXI reliable?
The price and inventory of CYUSB3328-88LTXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYUSB3328-88LTXI is usually 5 days.
3.What payment methods are accepted for CYUSB3328-88LTXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYUSB3328-88LTXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYUSB3328-88LTXI?
CYUSB3328-88LTXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYUSB3328-88LTXI 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 CYUSB3328-88LTXI?
For technical support, including CYUSB3328-88LTXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYUSB3328-88LTXI requirements.
6.How does Aetrix verify that CYUSB3328-88LTXI is sourced from the original manufacturer or authorized distributors?
All CYUSB3328-88LTXI 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 CYUSB3328-88LTXI meets industry standards.
7.What is the process for return or replacement of CYUSB3328-88LTXI?
All CYUSB3328-88LTXI units undergo pre-shipment inspection (PSI). If there is an issue with CYUSB3328-88LTXI, 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 CYUSB3328-88LTXI part is unused and in its original packaging.
Return procedure for CYUSB3328-88LTXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CYUSB3328-88LTXI 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
Infineon Technologies
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SLB9673XU20FW2613XTMA1
Infineon Technologies
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CYPD3125-40LQXIT
Infineon Technologies
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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
-
SLB9672XU20FW1613XTMA1
Infineon Technologies
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SLB9672AU20FW1613XTMA1
Infineon Technologies
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SLB9673AU20FW2613XTMA1
Infineon Technologies
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