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Infineon Technologies CYUSB3326-88LTXI
- Part No.:
- CYUSB3326-88LTXI
- Manufacturer:
- Infineon Technologies
- Category:
- Application Specific Microcontrollers
- Package:
- 88-VFQFN Exposed Pad
- Datasheet:
-
CYUSB3326-88LTXI.pdf
- Description:
- IC USB 3.0 HUB 6-PORT 88QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,639
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Product details
Overview
CYUSB3326-88LTXI from Infineon is a USB 3.2 Gen 1 hub controller with six downstream ports (2× USB 3.0 SuperSpeed + 2× shared-link SS + 2× USB 2.0), integrated ARM® Cortex®-M0 CPU (16 KB RAM, 32 KB ROM), USB BC v1.2 charging compliance, ghost charging capability, and industrial temperature range (–40°C to +85°C). It serves as the central hub controller in embedded docking stations requiring multi-protocol port expansion and intelligent power management.
For engineers reviewing the CYUSB3326-88LTXI datasheet, CYUSB3326-88LTXI pinout, CYUSB3326-88LTXI application, or CYUSB3326-88LTXI equivalent, key selection criteria include shared-link port configuration, ghost charging behavior under upstream-disconnected conditions, I2C master/slave flexibility for firmware update, and 88-pin QFN thermal and routing constraints.
Technical Context
The CYUSB3326 implements dual-hub architecture: a dedicated USB 3.0 SS hub controller supporting U0–U3 link power states and full-duplex 5 Gbps operation, plus a USB 2.0 hub controller with four transaction translators (Multi-TT) and L0–L3 power management. Its shared-link feature enables DS1/DS2 to concurrently serve one embedded SS device and one removable USB 2.0 device.
The integrated Cortex-M0 executes real-time battery charging control, vendor-command processing (e.g., USB-to-I2C bridge), GPIO-configurable overcurrent detection, and dynamic port numbering. Configuration is supported via pin-straps, eFuse, or I2C EEPROM - with factory-programmed defaults enabling boot without external memory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Downstream Ports | 6 total: 2× USB 3.0 SS + 2× shared-link SS/USB 2.0 + 2× USB 2.0 - enables 8-device topology in embedded systems |
| Data Rates | 5 Gbps (SS), 480 Mbps (HS), 12 Mbps (FS), 1.5 Mbps (LS) - full backward compatibility across all ports |
| Charging Support | USB BC v1.2 compliant on all DS ports; ghost charging active when US port unconnected - enables standalone charging without host |
| CPU Core | ARM® Cortex®-M0 @ up to 48 MHz with 16 KB RAM + 32 KB ROM - runs firmware for GPIO control, descriptor handling, and vendor commands |
| Configuration Interface | I2C master/slave/multi-master + pin-strap + eFuse - allows flexible BOM reduction and field firmware updates via USB |
| Operating Temp | –40°C to +85°C (industrial grade) - validated for sustained operation in enclosed docking station enclosures |
| Package | 88-pin QFN (10 × 10 × 1.0 mm), exposed thermal pad - supports 1.8 W typical power dissipation with standard PCB copper pour |
Pinout & Package
88-pin QFN (10 mm × 10 mm × 1.0 mm body, 0.5 mm pitch), thermally enhanced with exposed center pad (EPAD) connected to ground plane for thermal management. Pin assignment validated per Infineon datasheet Rev. *V, pages 11–27.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_3P3 | 3.3 V supply input | Primary digital I/O rail; requires local 10 µF + 100 nF decoupling per datasheet Section 10.1 |
| VDD_1P2 | 1.2 V core supply input | Internal PLL and CPU core rail; must be clean, low-noise regulated source |
| US_DP / US_DM | Upstream differential pair | Connects to host controller; requires controlled 90 Ω impedance and <5 mm length matching |
| DS1_SSTXP/M / DS1_SSRXP/M | Downstream Port 1 SS differential pair | Shared-link capable: carries SS traffic to embedded device or USB 2.0 traffic to removable peripheral |
| I2C_SDA / I2C_SCL | I2C interface signals | Supports master/slave mode; pull-ups required externally (typically 2.2 kΩ to 3.3 V) |
| GPIO[0:7] | Configurable general-purpose I/O | Programmable as power enable, overcurrent flag, LED drive, or reset control via firmware |
| EPAD | Thermal pad | Must be soldered to solid ground plane; contributes >60% of thermal conduction in QFN package |
Key Features
| Feature | Design Value |
|---|---|
| Shared Link Architecture | DS1/DS2 simultaneously support one embedded SS device and one removable USB 2.0 device - eliminates need for separate hubs in space-constrained dock designs |
| Ghost Charging | Each DS port emulates a DCP (Dedicated Charging Port) when upstream host is absent - enables battery top-up for peripherals without host negotiation |
| USB-to-I2C Bridge | Vendor-command enabled firmware path allows EZ-USB™ HX3 to program external ASSPs or EEPROMs over USB - removes need for separate programming hardware |
| Pin-Strap Configuration | Hardware-selectable VID/PID, port count, power switch ganging, and BC v1.2 enable/disable - reduces firmware dependency and simplifies production test |
| ACA-Dock Support | Enables smartphone/tablet acting as USB host to charge and transfer data simultaneously via DS ports - validated with BC v1.2 accessory charger adapter dock |
Applications
| Docking Station | Embedded Industrial PC |
|---|---|
|
Use Scenario: Multi-peripheral docking station connecting laptop to display, storage, keyboard, and cellular modem. IC Role / Device Role / Timing Role: Central USB hub controller managing concurrent SS video streaming, HS storage access, and FS HID traffic with independent power switching. Use Value: Shared-link ports reduce component count by consolidating embedded SSD and removable peripherals on same physical connector. |
Use Scenario: Fanless IPC in factory automation running vision camera, barcode scanner, and PLC interface over USB. IC Role / Device Role / Timing Role: Robust hub controller with industrial temp rating and ghost charging - sustains peripheral operation during host reboot cycles. Use Value: Ghost charging maintains barcode scanner battery during host downtime, avoiding manual recharging interruptions. |
| Smart Monitor Hub | Medical Diagnostic Dock |
|
Use Scenario: USB-C monitor with built-in hub providing DP Alt Mode, USB 3.2 data, and charging to connected laptop and peripherals. IC Role / Device Role / Timing Role: Downstream port manager with ACA-Dock support - enables tablet host to charge while transferring DICOM image data. Use Value: ACA-Dock mode satisfies simultaneous charging + data transfer requirement for FDA-cleared diagnostic tablets. |
Use Scenario: Portable ultrasound dock connecting probe, SSD recorder, and wireless telemetry module to tablet host. IC Role / Device Role / Timing Role: High-reliability hub with BC v1.2 and ESD-hardened I/O - ensures uninterrupted data capture during battery-swapping events. Use Value: Integrated overcurrent detection on each DS port prevents fault propagation during probe hot-plug in clinical environments. |
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 |
|---|---|---|---|
| CYUSB3324-88LTXI | 4 DS ports (all USB 3.0), no shared-link capability, no ACA-Dock support | Suitable for simpler hubs without embedded device co-location or smartphone-hosted data transfer | Select when port count and ghost charging are sufficient but ACA-Dock and shared-link are unnecessary |
| CYUSB3328-88LTXI | 8 DS ports (4× SS + 4× USB 2.0), shared-link on DS1–DS4, commercial temp only (0°C to +70°C) | Targeted at high-port-count consumer docks where industrial temp range is not required | Select when scaling beyond 6 ports is needed and ambient operating temperature stays within commercial range |
Compared with CYUSB3324 and CYUSB3328, CYUSB3326 uniquely balances industrial reliability, shared-link flexibility for embedded integration, and ACA-Dock readiness - making it optimal for medical and industrial docking where host disconnection resilience and mixed-device topology are critical.
Availability
CYUSB3326-88LTXI is available at Aetrix Electronics and suitable for docking stations, embedded industrial PCs, smart monitors, and medical diagnostic docks requiring stable component supply, long-term lifecycle assurance, and industrial-grade thermal performance.
Supply support for CYUSB3326-88LTXI 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, automotive ICs, and connectivity solutions, with global R&D and manufacturing infrastructure.
CYUSB3326 belongs to the EZ-USB™ HX3 family - designed specifically for high-integration USB 3.2 Gen 1 hub applications in space-constrained, thermally demanding embedded systems requiring intelligent power and charging control.
FAQ
Does CYUSB3326-88LTXI require an external EEPROM to operate?
No. CYUSB3326-88LTXI boots using factory-programmed eFuse configuration and supports pin-strap setup, enabling full functionality without external memory. An I2C EEPROM is optional for advanced customization, firmware updates, or string descriptor storage - not mandatory for basic hub operation or BC v1.2 charging.
Can shared-link ports operate in USB 2.0 mode only, without SuperSpeed?
Yes. Each shared-link port (DS1/DS2) can be configured at runtime via firmware or pin-straps to operate exclusively as a USB 2.0 port - disabling SS PHY while retaining HS/FS/LS support. This mode reduces power consumption and simplifies layout when embedded SS devices are not present.
What is the maximum sustained power dissipation for CYUSB3326-88LTXI in its 88-pin QFN package?
At full 6-port load with all ports active at 5 Gbps and BC v1.2 charging enabled, typical power dissipation is 1.42 W (per datasheet Section 10.2). With proper PCB thermal design - including 4-layer board, 2 oz copper, and EPAD soldered to ≥4 cm² ground plane - junction temperature remains within spec at +85°C ambient.
Is Windows driver support included out-of-the-box for CYUSB3326-88LTXI?
Yes. CYUSB3326-88LTXI 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, enumeration, or power switching - only optional Blaster Plus software is needed for advanced configuration or firmware updates.
CYUSB3326-88LTXI 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)
CYUSB3326-88LTXI FAQ
1.How can I place an order for CYUSB3326-88LTXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CYUSB3326-88LTXI 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 CYUSB3326-88LTXI reliable?
The price and inventory of CYUSB3326-88LTXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYUSB3326-88LTXI is usually 5 days.
3.What payment methods are accepted for CYUSB3326-88LTXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYUSB3326-88LTXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYUSB3326-88LTXI?
CYUSB3326-88LTXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYUSB3326-88LTXI 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 CYUSB3326-88LTXI?
For technical support, including CYUSB3326-88LTXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYUSB3326-88LTXI requirements.
6.How does Aetrix verify that CYUSB3326-88LTXI is sourced from the original manufacturer or authorized distributors?
All CYUSB3326-88LTXI 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 CYUSB3326-88LTXI meets industry standards.
7.What is the process for return or replacement of CYUSB3326-88LTXI?
All CYUSB3326-88LTXI units undergo pre-shipment inspection (PSI). If there is an issue with CYUSB3326-88LTXI, 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 CYUSB3326-88LTXI part is unused and in its original packaging.
Return procedure for CYUSB3326-88LTXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CYUSB3326-88LTXI 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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