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Infineon Technologies CYUSB3326-88LTXCT
- Part No.:
- CYUSB3326-88LTXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Application Specific Microcontrollers
- Package:
- 88-VFQFN Exposed Pad
- Datasheet:
-
CYUSB3326-88LTXCT.pdf
- Description:
- IC USB 3.0 HUB 6-PORT 88QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,790
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Product details
Overview
CYUSB3326-88LTXCT 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 an 88-pin QFN (10 × 10 × 1.0 mm) package.
For engineers reviewing the CYUSB3326-88LTXCT datasheet, CYUSB3326-88LTXCT pinout, CYUSB3326-88LTXCT application, or CYUSB3326-88LTXCT equivalent, this device delivers configurable port topology, embedded firmware upgradability via I2C or USB, vendor-command–enabled USB-to-I2C bridging, and industrial-grade thermal reliability for docking stations and embedded host systems.
Technical Context
The CYUSB3326 integrates dual 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 shared-link architecture enables simultaneous SS and USB 2.0 connectivity on DS1/DS2.
The embedded ARM® Cortex®-M0 subsystem manages configuration initialization, BC v1.2 charging control per port, LED/GPIO mapping, and vendor-command execution for USB-to-I2C bridge functions. I2C interface supports slave, master, and multi-master modes - enabling EEPROM-based configuration, in-system programming, and coexistence with other I2C masters.
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 - ensures backward compatibility and mixed-speed system integration. |
| Downstream Ports | 6 total: 2 dedicated SS, 2 shared-link SS/USB 2.0, 2 USB 2.0-only - enables flexible embedded topology with up to eight device connections. |
| Charging Compliance | USB BC v1.2 on all DS ports - supports DCP emulation (ghost charging) and ACA-Dock mode for smartphone/tablet host charging + data transfer. |
| CPU Core | ARM® Cortex®-M0 with 16 KB RAM / 32 KB ROM - executes real-time port control, GPIO configuration, and firmware updates without external processor dependency. |
| Configuration Interface | I2C (slave/master/multi-master) + pin-straps + eFuse - allows factory-programmed settings, field-upgradable descriptors, and PCB routing flexibility. |
| Operating Temperature | –40°C to +85°C - validated for industrial environments including docking stations and digital TVs. |
| Package | 88-pin QFN (10 × 10 × 1.0 mm) - surface-mount compatible with standard reflow profiles and thermal pad grounding. |
Pinout & Package
Package: 88-pin QFN (10 mm × 10 mm × 1.0 mm), exposed thermal pad, RoHS-compliant, industrial temperature grade.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_3P3 | 3.3 V supply input | Primary power rail for USB 2.0 PHY, I2C, GPIOs, and core logic; requires local 3.3 V regulation and decoupling. |
| VDD_1P2 | 1.2 V supply input | Core voltage for ARM® Cortex®-M0 and SS PHY; must be clean, low-noise, and independently regulated. |
| US_DP / US_DM | Upstream differential pair | Connects to host controller; supports SS and USB 2.0 signaling; requires controlled 90 Ω impedance routing. |
| DS1_SSTXP/M / DS1_SSRXP/M | Downstream Port 1 SuperSpeed TX/RX | Full-duplex 5 Gbps lane; shared-link capable - also routes USB 2.0 DP/DM when configured as hybrid port. |
| DS1_DP / DS1_DM | Downstream Port 1 USB 2.0 differential pair | Used only when DS1 is in USB 2.0-only or shared-link mode; internally switched based on port configuration. |
| I2C_SDA / I2C_SCL | I2C bidirectional interface | Configures device at boot (slave mode) or programs external EEPROM (master mode); supports 100/400 kHz operation. |
| GPIO[0:7] | General-purpose I/O | Programmable for overcurrent detection, power switch enable/disable, LED status indication, or custom system signaling. |
Key Features
| Feature | Design Value |
|---|---|
| Shared-link port architecture | DS1 and DS2 support concurrent SS and USB 2.0 device attachment - eliminates need for separate hubs in space-constrained embedded designs. |
| Ghost charging | Each DS port emulates a DCP without upstream host connection - enables battery charging of peripherals during system standby or offline operation. |
| ACA-Dock support | Enables simultaneous charging and data transfer when smartphone/tablet acts as USB host - compliant with BC v1.2 accessory charger adapter requirements. |
| USB-to-I2C bridge via vendor commands | Firmware-controlled I2C master capability allows USB-initiated programming of external ASSPs or EEPROMs - reduces BOM and debug interface count. |
| Pin-strap configuration | Hardware-selectable VID/PID, port count, power switch ganging, and charging enable - eliminates need for external configuration memory in cost-sensitive designs. |
Applications
| Docking Station | Embedded Industrial Host |
|---|---|
|
Use Scenario: Multi-peripheral docking station connecting laptop to monitor, storage, keyboard, and smartphone. IC Role / Device Role / Timing Role: Central USB hub controller managing upstream host negotiation, downstream port arbitration, and BC v1.2 charging handshaking. Use Value: Enables ACA-Dock mode for smartphone-as-host data+charge, plus ghost charging for peripherals during laptop sleep - no external charger required. |
Use Scenario: Ruggedized medical tablet with integrated USB expansion for barcode scanner, printer, and diagnostic sensor. IC Role / Device Role / Timing Role: Embedded hub with shared-link ports connecting fixed SS imaging module and removable USB 2.0 peripherals. Use Value: Reduces PCB layer count by combining SS and USB 2.0 routing on same port pair - meets IPC-6012 Class 2 reliability with industrial temp range. |
| Digital Television | Set-Top Box |
|
Use Scenario: Smart TV with front-panel USB ports for media playback, firmware update, and mobile device charging. IC Role / Device Role / Timing Role: Hub controller providing BC v1.2-compliant charging and USB 3.2 Gen 1 bandwidth for high-res video streaming devices. Use Value: Delivers 5 Gbps throughput to USB 3.x SSDs while maintaining Apple charging compatibility on all ports - no user-facing driver install needed. |
Use Scenario: Cable/satellite STB with USB service port for diagnostics, firmware recovery, and external DVR storage. IC Role / Device Role / Timing Role: Configurable hub with pin-strapped VID/PID and I2C-upgradable descriptors - supports OEM branding and field updates. Use Value: Eliminates need for external EEPROM by storing descriptors in internal ROM or eFuse - reduces component count and qualification effort. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB hub controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CYUSB3324-88LTXCT | Four downstream ports (all USB 3.2 Gen 1), no shared-link capability, no ACA-Dock support. | Suitable for simpler hubs without smartphone-as-host use cases or hybrid SS/USB 2.0 port requirements. | Select when port count and ghost charging are sufficient but ACA-Dock and shared-link are unnecessary. |
| CYUSB3328-88LTXCT | Eight downstream ports (four SS + four USB 2.0), supports four shared-link ports, industrial-grade 88-QFN only. | Targeted at high-port-count embedded systems requiring maximum peripheral density and thermal robustness. | Choose when expanding beyond six ports and needing four shared-link interfaces for modular peripheral stacking. |
Compared with CYUSB3324 and CYUSB3328, the CYUSB3326 uniquely balances six-port capacity, shared-link flexibility on DS1/DS2, and ACA-Dock support - making it optimal for mid-tier docking and embedded host applications where cost, size, and feature set must align precisely.
Availability
CYUSB3326-88LTXCT is available at Aetrix Electronics and suitable for docking stations, embedded industrial hosts, digital televisions, and set-top boxes requiring stable component supply, industrial temperature operation, and USB 3.2 Gen 1 compliance.
Supply support for CYUSB3326-88LTXCT 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.
CYUSB3326 belongs to the EZ-USB™ HX3 family - designed specifically for high-integration USB hub applications demanding configurability, embedded intelligence, and industrial-grade reliability in compact form factors.
FAQ
Does CYUSB3326-88LTXCT require an external EEPROM for basic operation?
No. The device boots using internal ROM and supports pin-strap configuration for VID/PID, port count, and charging enable. An external I2C EEPROM is optional - used only for custom string descriptors, advanced configuration, or field firmware updates via USB-to-I2C bridge functionality.
Can DS1 and DS2 operate simultaneously as both SuperSpeed and USB 2.0 ports?
Yes. DS1 and DS2 are designated shared-link ports. Each can concurrently connect one SuperSpeed device (via SSTxP/M and SSRxP/M) and one USB 2.0 device (via DP/DM), enabled by internal signal routing and port controller arbitration - no external multiplexing required.
What is the role of the ARM® Cortex®-M0 in CYUSB3326-88LTXCT?
The Cortex®-M0 executes boot initialization, BC v1.2 charging state machines, GPIO-driven power switch control, LED status sequencing, and vendor-command processing for USB-to-I2C bridging. It runs firmware stored in internal ROM or loaded from I2C EEPROM, eliminating need for external microcontroller coordination.
Is ACA-Dock mode supported on all downstream ports?
No. ACA-Dock mode is implemented only on DS3 and DS4 in CYUSB3326. DS1 and DS2 - being shared-link ports - support ghost charging and standard BC v1.2, but not ACA-Dock, due to hardware resource allocation and signal routing constraints documented in Section 4.4 of the datasheet.
CYUSB3326-88LTXCT 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 88-QFN (10x10)
CYUSB3326-88LTXCT FAQ
1.How can I place an order for CYUSB3326-88LTXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CYUSB3326-88LTXCT 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 CYUSB3326-88LTXCT reliable?
The price and inventory of CYUSB3326-88LTXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYUSB3326-88LTXCT is usually 5 days.
3.What payment methods are accepted for CYUSB3326-88LTXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYUSB3326-88LTXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYUSB3326-88LTXCT?
CYUSB3326-88LTXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYUSB3326-88LTXCT 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 CYUSB3326-88LTXCT?
For technical support, including CYUSB3326-88LTXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYUSB3326-88LTXCT requirements.
6.How does Aetrix verify that CYUSB3326-88LTXCT is sourced from the original manufacturer or authorized distributors?
All CYUSB3326-88LTXCT 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 CYUSB3326-88LTXCT meets industry standards.
7.What is the process for return or replacement of CYUSB3326-88LTXCT?
All CYUSB3326-88LTXCT units undergo pre-shipment inspection (PSI). If there is an issue with CYUSB3326-88LTXCT, 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 CYUSB3326-88LTXCT part is unused and in its original packaging.
Return procedure for CYUSB3326-88LTXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CYUSB3326-88LTXCT 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
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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
Infineon Technologies
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SLB9672AU20FW1613XTMA1
Infineon Technologies
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SLB9673AU20FW2613XTMA1
Infineon Technologies
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