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Infineon Technologies CYUSB3326-88LTXIT
- Part No.:
- CYUSB3326-88LTXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Application Specific Microcontrollers
- Package:
- 88-VFQFN Exposed Pad
- Datasheet:
-
CYUSB3326-88LTXIT.pdf
- Description:
- IC USB 3.0 HUB 6-PORT 88QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,558
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Product details
Overview
CYUSB3326-88LTXIT from Infineon is a USB 3.2 Gen 1 (5 Gbps) hub controller with six downstream ports-two SuperSpeed (SS), two SS/USB 2.0 shared-link ports, and two USB 2.0-only ports-supporting BC v1.2 charging, ghost charging, ACA-Dock mode, and integrated ARM® Cortex®-M0 CPU (16 KB RAM, 32 KB ROM). It operates across –40°C to +85°C and uses pin-straps or I2C for configuration in docking stations and embedded host systems.
For engineers reviewing the CYUSB3326-88LTXIT datasheet, CYUSB3326-88LTXIT pinout, CYUSB3326-88LTXIT application, or CYUSB3326-88LTXIT equivalent, key selection criteria include shared-link port count, BC v1.2 compliance per port, ghost charging capability during upstream disconnection, ACA-Dock support for smartphone-as-host use cases, and 88-pin QFN package thermal and routing constraints.
Technical Context
The CYUSB3326 implements dual independent hub controllers: an 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 shared-link architecture enables simultaneous SS and USB 2.0 device attachment on DS1 and DS2.
The integrated Cortex®-M0 executes firmware for battery charging control, vendor-command processing (e.g., USB-to-I2C bridge), string descriptor handling, and port power sequencing. Configuration is supported via pin-straps, eFuse, or I2C EEPROM (slave or master mode), with real-time in-system programming of external EEPROM over USB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Speed Support | 5 Gbps SS, 480 Mbps HS, 12 Mbps FS, 1.5 Mbps LS on all ports |
| Downstream Ports | 6 total: 2 dedicated SS, 2 shared-link SS/USB 2.0, 2 USB 2.0-only |
| Battery Charging | Complies with USB BC v1.2; ghost charging enabled on all DS ports when US is disconnected |
| CPU Core | ARM® Cortex®-M0 with 16 KB RAM, 32 KB ROM for firmware execution and GPIO control |
| Configuration Interface | I2C slave/master/multi-master; supports EEPROM-based boot and runtime reconfiguration |
| Operating Temp | Industrial range: –40°C to +85°C, validated for continuous operation in embedded dock systems |
| Package | 88-pin QFN (10 × 10 × 1.0 mm), exposed thermal pad, RoHS-compliant |
Pinout & Package
Package: 88-pin QFN (10 mm × 10 mm × 1.0 mm), thermally enhanced with exposed paddle. Pinout validated per Infineon datasheet Rev. *V (pp. 11–27), including dedicated VBUS detect, LED drive, OVR (overcurrent), PWR (power switch control), SSRxP/M and SSTxP/M differential pairs per SS port, DM/DP for USB 2.0, I2C_DATA/CLK, GPIOs, and reset/config pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO_33 | I/O Power Supply | 3.3 V supply for USB 2.0 PHY, GPIOs, and digital logic; decoupling required per layout guidelines |
| VDDA_12 | Analog Core Supply | 1.2 V analog supply for SS PHY; low-noise regulation critical for 5 Gbps signal integrity |
| US_SSTxP/M, US_SSRxP/M | Upstream SS Differential Pair | Connects to host controller's SS lane; requires controlled 85 Ω differential impedance routing |
| DS1_SSTxP/M, DS1_SSRxP/M | Downstream Port 1 SS Pair | Shared-link capable: supports concurrent SS device and USB 2.0 device on same port |
| PWR1–PWR6 | Port Power Switch Control | Active-low signals driving external load switches; ganged or individual enable per configuration |
| OVR1–OVR6 | Overcurrent Detection Input | Open-drain inputs monitoring current sense resistors; triggers port disable on fault |
| I2C_DATA, I2C_CLK | I2C Bus Interface | Supports EEPROM boot, runtime reconfiguration, and ISP of external memory |
| GPIO0–GPIO7 | Configurable General-Purpose I/O | Programmable for LED status, power enable, or custom system control via firmware |
Key Features
| Feature | Design Value |
|---|---|
| Shared Link Architecture | Enables two downstream ports (DS1/DS2) to concurrently serve one SS device and one USB 2.0 device-doubling effective device count without extra physical ports |
| Ghost Charging | Each DS port emulates a Dedicated Charging Port (DCP) when upstream host is absent, enabling battery top-up for peripherals without host presence |
| ACA-Dock Mode | Allows smartphone or tablet acting as USB host (BC v1.2 compliant) to simultaneously charge and exchange data through the hub |
| USB-to-I2C Bridge | Vendor-command interface enables EZ-USB™ HX3 to act as USB-attached I2C master-programming external ASSPs or EEPROMs without host CPU involvement |
| Flexible Configuration | Pin-straps set VID/PID, port count, power switch mode, and charging enable-eliminating need for external configuration EEPROM in cost-sensitive designs |
Applications
| Docking Station | Embedded Industrial Host |
|---|---|
Use Scenario: A compact desktop dock connects laptop to multiple peripherals including SSD, monitor, keyboard, and smartphone. IC Role / Device Role / Timing Role: Hub controller managing concurrent 5 Gbps SSD traffic, 480 Mbps HID data, and BC v1.2 charging-all under single upstream link. Use Value: Shared-link ports allow simultaneous connection of high-speed storage and legacy USB 2.0 devices on same physical port, reducing PCB layer count and BOM cost. | Use Scenario: Ruggedized medical imaging device integrates USB peripherals (keyboard, flash drive, printer) while operating unattended in clinical environments. IC Role / Device Role / Timing Role: Embedded hub providing isolated, configurable port power control and overcurrent protection per peripheral slot. Use Value: Ghost charging ensures connected diagnostic tools remain powered and ready even when main host is powered down for maintenance. |
| Smartphone Cradle | Digital Signage Controller |
Use Scenario: Vehicle-mounted cradle accepts Android/iOS phone for navigation, media playback, and charging via single USB-C cable. IC Role / Device Role / Timing Role: ACA-Dock mode enables phone-as-host functionality: streaming video to display while drawing up to 1.5 A via DCP emulation. Use Value: Eliminates need for separate charging circuitry-charging and data coexist on one cable using standard BC v1.2 signaling. | Use Scenario: Retail kiosk uses USB to attach barcode scanner, receipt printer, and customer-facing touchscreen-all requiring stable enumeration and power delivery. IC Role / Device Role / Timing Role: Multi-TT USB 2.0 hub ensures non-blocking HID and printer traffic; SS ports handle high-res image updates to display controller. Use Value: Individual port power switching prevents one faulty peripheral from disrupting enumeration or operation of other attached devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB 3.x hub controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CYUSB3324-88LTXIT | Four downstream ports (all USB 3.0), no shared-link capability, no ACA-Dock support | Suitable for standard multi-peripheral hubs where smartphone-as-host is not required | Select when port count and BC v1.2 suffice without shared-link density or ACA-Dock flexibility |
| USB5744-AEZG-TR | Four-port USB 3.0 hub, no integrated MCU, no ghost charging or shared-link features, fixed VID/PID | Targeted at cost-sensitive consumer docks with minimal firmware customization needs | Choose when deterministic, low-latency hub behavior is prioritized over programmability and charging intelligence |
Compared with CYUSB3324-88LTXIT and USB5744-AEZG-TR, CYUSB3326-88LTXIT uniquely delivers six-port density with shared-link expansion, ghost charging autonomy, and ACA-Dock interoperability-enabling compact, intelligent embedded hosts that maintain peripheral readiness and smartphone integration without host dependency.
Availability
CYUSB3326-88LTXIT is available at Aetrix Electronics and suitable for docking stations, embedded industrial hosts, smartphone cradles, and digital signage controllers requiring stable component supply, industrial temperature operation, and long-term lifecycle support.
Supply support for CYUSB3326-88LTXIT 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 IoT markets.
CYUSB3326 belongs to the EZ-USB™ HX3 family-designed specifically for intelligent, configurable USB 3.x hub applications in space-constrained embedded systems requiring autonomous charging, flexible topology, and firmware-upgradable functionality.
FAQ
Does CYUSB3326-88LTXIT support USB 3.2 Gen 2 (10 Gbps)?
No. CYUSB3326-88LTXIT complies with USB 3.2 Gen 1 (5 Gbps) and is backward-compatible with USB 2.0 High-Speed (480 Mbps), Full-Speed (12 Mbps), and Low-Speed (1.5 Mbps). It does not implement the 10 Gbps SuperSpeed+ PHY or associated protocol layers required for Gen 2 operation.
Can the shared-link ports operate in USB 2.0-only mode without SuperSpeed negotiation?
Yes. Each shared-link port (DS1 and DS2) can be configured via firmware or pin-straps to operate exclusively as a USB 2.0 port, disabling SS lane negotiation. This allows compatibility with legacy connectors or cost-optimized designs where SuperSpeed capability is unused on those ports.
What is the maximum sustained power dissipation for CYUSB3326-88LTXIT in the 88-pin QFN package?
At full 6-port operation with all SS links active and BC v1.2 charging enabled, typical power dissipation is 1.25 W. The 88-pin QFN package is rated for continuous operation up to 1.5 W with proper PCB thermal design (≥4 thermal vias to internal ground plane, 2 oz copper).
Is Windows driver support included out-of-the-box for CYUSB3326-88LTXIT?
Yes. The device is Microsoft WHQL-certified for Windows XP through Windows 11, with class-compliant USB hub drivers pre-installed. No custom INF files or vendor drivers are required for basic enumeration and data routing; advanced features like ghost charging or vendor commands require Infineon's Blaster Plus tool or custom firmware integration.
CYUSB3326-88LTXIT 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)
CYUSB3326-88LTXIT FAQ
1.How can I place an order for CYUSB3326-88LTXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CYUSB3326-88LTXIT 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 CYUSB3326-88LTXIT reliable?
The price and inventory of CYUSB3326-88LTXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYUSB3326-88LTXIT is usually 5 days.
3.What payment methods are accepted for CYUSB3326-88LTXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYUSB3326-88LTXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYUSB3326-88LTXIT?
CYUSB3326-88LTXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYUSB3326-88LTXIT 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 CYUSB3326-88LTXIT?
For technical support, including CYUSB3326-88LTXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYUSB3326-88LTXIT requirements.
6.How does Aetrix verify that CYUSB3326-88LTXIT is sourced from the original manufacturer or authorized distributors?
All CYUSB3326-88LTXIT 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 CYUSB3326-88LTXIT meets industry standards.
7.What is the process for return or replacement of CYUSB3326-88LTXIT?
All CYUSB3326-88LTXIT units undergo pre-shipment inspection (PSI). If there is an issue with CYUSB3326-88LTXIT, 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 CYUSB3326-88LTXIT part is unused and in its original packaging.
Return procedure for CYUSB3326-88LTXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CYUSB3326-88LTXIT Tags
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