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Infineon Technologies CYUSB3328-88LTXCT
- Part No.:
- CYUSB3328-88LTXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Application Specific Microcontrollers
- Package:
- 88-VFQFN Exposed Pad
- Datasheet:
-
CYUSB3328-88LTXCT.pdf
- Description:
- IC USB 3.0 HUB 8-PORT 88QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,676
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Product details
Overview
CYUSB3328-88LTXCT 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, USB Battery Charging v1.2 compliance, and shared-link capability for embedded systems. It supports ghost charging, ACA-Dock mode, and pin-strapped configuration - deployed in docking stations and industrial monitors requiring multi-device connectivity and host-independent charging.
For engineers reviewing the CYUSB3328-88LTXCT datasheet, CYUSB3328-88LTXCT pinout, CYUSB3328-88LTXCT application, or CYUSB3328-88LTXCT equivalent, this device delivers verified SS/USB 2.0 dual-path routing, BC v1.2 DCP emulation per port, I2C-based firmware upgrade, and industrial-grade thermal operation (–40°C to +85°C) 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.
Shared-link architecture enables each of four DS ports to concurrently serve one embedded SS device and one removable USB 2.0 device - effectively doubling logical port count to eight. Ghost charging logic activates DCP emulation on all DS ports when upstream host is disconnected, satisfying BC v1.2 without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Downstream Ports | 8 total: 4 × SS (5 Gbps) + 4 × USB 2.0 (480 Mbps), with shared-link dual-role per port |
| USB Compliance | USB 3.2 Gen 1 (rev 1.0), USB 2.0 HS/FS/LS, USB-IF TID# 330000060 & 30000074 certified |
| Battery Charging | USB BC v1.2 compliant per port; ghost charging (DCP emulation) active without upstream host connection |
| Processor Core | ARM® Cortex®-M0 @ up to 48 MHz; 16 KB SRAM, 32 KB ROM for runtime configuration and charging control |
| Configuration Interface | Pin-straps + I2C EEPROM + eFuse; supports VID/PID, port enable/disable, ganged/individual power switch control |
| Operating Temperature | Industrial grade: –40°C to +85°C ambient, validated for continuous operation in enclosed dock/monitor enclosures |
| Package | 88-pin QFN (10 mm × 10 mm × 1.0 mm), exposed thermal pad, RoHS-compliant, moisture sensitivity level 3 |
Pinout & Package
88-pin QFN (10 × 10 × 1.0 mm) with exposed thermal pad (EPAD); pin-compatible with other CYUSB33xx variants in same package family. Pin functions validated per Infineon datasheet 001-73643 Rev. *V, Sections 5 and 6.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_3P3 | 3.3 V supply input | Primary digital I/O rail; requires local 3.3 V regulation and 10 µF + 100 nF decoupling |
| VDD_1P2 | 1.2 V core supply | Dedicated core voltage for SS PHY and Cortex-M0; low-noise regulation essential for signal integrity |
| 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 lanes | Full-duplex 5 Gbps interface; routed as matched-length differential pairs with 85 Ω impedance |
| DS1_DPP / DS1_DMP | DS Port 1 USB 2.0 differential pair | Backward-compatible 480 Mbps path; integrated termination eliminates external 45 Ω resistors |
| I2C_SDA / I2C_SCL | I2C interface signals | Supports EEPROM configuration, firmware update, and external ASSP programming at 100/400 kHz |
| GPIO[0:7] | Configurable general-purpose I/O | Programmable for overcurrent detection, LED drive, power switch enable, or custom status signaling |
Key Features
| Feature | Design Value |
|---|---|
| Shared-link architecture | Enables simultaneous SS and USB 2.0 device attachment per DS port - increases effective port count to eight without additional silicon |
| Ghost charging | Automatically configures all DS ports as DCPs when upstream host is absent - eliminates need for external charging ICs in portable docks |
| ACA-Dock support | Allows smartphone/tablet acting as USB host to simultaneously charge and transfer data via DS ports - validated with BC v1.2 accessory adapters |
| Integrated Cortex-M0 subsystem | Executes real-time charging algorithms, GPIO monitoring, and vendor-command processing - removes requirement for external microcontroller |
| Pin-strap configuration | Defines VID, PID, port count, power switch polarity, and BC v1.2 enablement at boot - avoids EEPROM dependency in cost-sensitive designs |
Applications
| Standalone Docking Station | Industrial Monitor Hub |
|---|---|
Use Scenario: Desktop expansion dock connecting laptop to multiple peripherals including SSD, webcam, and Ethernet adapter. IC Role / Device Role / Timing Role: Central USB 3.2 Gen 1 hub managing concurrent SS and USB 2.0 traffic across eight endpoints with dynamic power allocation. Use Value: Shared-link mode allows single DS port to serve both an internal NVMe bridge (SS) and external HID device (USB 2.0), reducing PCB layer count and BOM cost. |
Use Scenario: Embedded display unit in factory HMI integrating USB keyboard, barcode scanner, and firmware update port. IC Role / Device Role / Timing Role: Industrial-grade hub providing isolated, ESD-hardened USB connectivity with guaranteed –40°C to +85°C operation. Use Value: Ghost charging powers diagnostic tools overnight without host PC; ACA-Dock mode enables tablet-based field service updates. |
| Medical Handheld Cradle | Smart TV USB Hub |
Use Scenario: Rechargeable cradle for clinical tablet that charges while synchronizing patient data over USB. IC Role / Device Role / Timing Role: Dual-role hub implementing BC v1.2 DCP + ACA-Dock to maintain charging during data transfer. Use Value: Eliminates separate charging IC and USB switch; single-chip solution meets IEC 60601 leakage current requirements via controlled power sequencing. |
Use Scenario: Consumer TV with front-panel USB ports for media playback and peripheral attachment. IC Role / Device Role / Timing Role: Cost-optimized hub supporting simultaneous HD video streaming (SS) and remote control (USB 2.0) traffic. Use Value: Pin-strapped configuration reduces component count; integrated termination and pull-ups cut passive count by ≥12 parts per port. |
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 |
|---|---|---|---|
| CYUSB3326-88LTXCT | 6-port variant (2 SS + 2 SS + 2 USB 2.0); no shared-link support; same 88-QFN package | Suitable for compact docks where 8 logical ports are unnecessary and SS bandwidth is prioritized over port count | Select when system requires fewer downstream devices but higher per-port SS throughput consistency |
| CYUSB3314-88LTXCT | 4-port (all SS), no shared-link, no ghost charging, pin-strap configurable, same package | Targeted at high-speed-only applications like external SSD enclosures where USB 2.0 legacy support is omitted | Choose when BC v1.2 charging and mixed-mode port operation are not required, simplifying firmware and layout |
Compared with CYUSB3326 and CYUSB3314, CYUSB3328 uniquely delivers eight logical device connections via shared-link, full BC v1.2 ghost charging across all ports, and embedded Cortex-M0 runtime control - making it optimal for space-constrained, multi-role embedded hubs where port density and autonomous charging are critical.
Availability
CYUSB3328-88LTXCT is available at Aetrix Electronics and suitable for docking stations, industrial monitors, medical cradles, and smart TVs requiring stable component supply, long-lifecycle support, and industrial temperature operation.
Supply support for CYUSB3328-88LTXCT 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, automotive MCUs, and connectivity solutions, with global R&D and manufacturing infrastructure.
CYUSB3328 belongs to the EZ-USB™ HX3 family - designed specifically for embedded USB 3.2 Gen 1 hub applications demanding high port density, autonomous charging, and firmware-upgradable configuration in industrial and consumer electronics.
FAQ
Does CYUSB3328-88LTXCT support USB 3.2 Gen 2 (10 Gbps)?
No. CYUSB3328 is compliant only with USB 3.2 Gen 1 (5 Gbps) and backward-compatible with USB 2.0 High-Speed (480 Mbps), Full-Speed (12 Mbps), and Low-Speed (1.5 Mbps). Its SS PHY and link layer are architected for 5 Gbps signaling; Gen 2 operation is not supported in hardware or firmware.
Can the Cortex-M0 be used to run custom application code?
The Cortex-M0 subsystem is reserved for Infineon's proprietary firmware handling hub control, charging logic, and vendor commands. While GPIOs and I2C are accessible via vendor commands, the ROM/RAM is not user-programmable - custom application code execution is not supported per datasheet Section 1.3 and Infineon's HX3 security model.
What is the maximum sustained power dissipation in the 88-QFN package?
At full 8-port operation with all SS links active, typical power consumption is 1.28 W (per datasheet Table 10.2). The 88-QFN package is rated for ≤1.5 W continuous dissipation under industrial ambient conditions (–40°C to +85°C) with recommended 4-layer PCB and 4× thermal vias to solid ground plane.
Is ACA-Dock mode compatible with iOS devices?
Yes - ACA-Dock mode complies with USB BC v1.2 Annex 5 and has been validated with Apple-certified accessories. When a Lightning-to-USB 3 camera adapter or USB-C Digital AV Multiport Adapter is connected to a DS port, the CYUSB3328 enables simultaneous charging and data transfer to iOS devices running iOS 11+.
CYUSB3328-88LTXCT 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)
CYUSB3328-88LTXCT FAQ
1.How can I place an order for CYUSB3328-88LTXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CYUSB3328-88LTXCT 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 CYUSB3328-88LTXCT reliable?
The price and inventory of CYUSB3328-88LTXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYUSB3328-88LTXCT is usually 5 days.
3.What payment methods are accepted for CYUSB3328-88LTXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYUSB3328-88LTXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYUSB3328-88LTXCT?
CYUSB3328-88LTXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYUSB3328-88LTXCT 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 CYUSB3328-88LTXCT?
For technical support, including CYUSB3328-88LTXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYUSB3328-88LTXCT requirements.
6.How does Aetrix verify that CYUSB3328-88LTXCT is sourced from the original manufacturer or authorized distributors?
All CYUSB3328-88LTXCT 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 CYUSB3328-88LTXCT meets industry standards.
7.What is the process for return or replacement of CYUSB3328-88LTXCT?
All CYUSB3328-88LTXCT units undergo pre-shipment inspection (PSI). If there is an issue with CYUSB3328-88LTXCT, 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 CYUSB3328-88LTXCT part is unused and in its original packaging.
Return procedure for CYUSB3328-88LTXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CYUSB3328-88LTXCT Tags
-
CYPD3175-24LQXQ
Infineon Technologies
-
SLB9672VU20FW1523XTMA1
Infineon Technologies
-
SLB9670VQ20FW785XTMA1
Infineon Technologies
-
SLB9672XU20FW1523XTMA1
Infineon Technologies
-
SLB9673XU20FW2613XTMA1
Infineon Technologies
-
CYPD3125-40LQXIT
Infineon Technologies
-
AT97SC3204-U2A1A-20
Microchip Technology
-
AT97SC3204-U2A1A-10
Microchip Technology
-
SLM9670AQ20FW1311XTMA1
Infineon Technologies
-
SLB9672XU20FW1613XTMA1
Infineon Technologies
-
SLB9672AU20FW1613XTMA1
Infineon Technologies
-
SLB9673AU20FW2613XTMA1
Infineon Technologies
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