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Infineon Technologies CYUSB3314-88LTXCT
- Part No.:
- CYUSB3314-88LTXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Application Specific Microcontrollers
- Package:
- 88-VFQFN Exposed Pad
- Datasheet:
-
CYUSB3314-88LTXCT.pdf
- Description:
- IC USB 3.0 HUB 4-PORT 88QFN
- Quantity:
- Payment:
- Shipping:
Inventory:254
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Product details
Overview
CYUSB3314-88LTXCT from Infineon is a USB 3.2 Gen 1 (5 Gbps) 4-port hub controller with integrated ARM® Cortex®-M0 CPU, USB 2.0 Multi-TT support, and BC v1.2-compliant charging on all downstream ports. It supports shared link mode for embedded dual-device per port, ghost charging without upstream host connection, and pin-strapped configuration for VID/PID, power switch control, and port enablement. Used in docking stations and industrial monitors requiring robust USB connectivity and intelligent power management.
For engineers reviewing the CYUSB3314-88LTXCT datasheet, CYUSB3314-88LTXCT pinout, CYUSB3314-88LTXCT application, or CYUSB3314-88LTXCT equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative options - all grounded in Infineon's official documentation and product specifications.
Technical Context
The CYUSB3314 implements two independent hub controllers: a SuperSpeed (SS) hub compliant with USB 3.0 specification revision 1.0, supporting U0–U3 link power states and full-duplex 5 Gbps operation; and a USB 2.0 hub with four transaction translators (one per DS port), L0–L3 power management, and HS/FS/LS backward compatibility. Both PHYs integrate termination, pull-up/pull-down resistors, and VBUS detection.
Its embedded ARM® Cortex®-M0 subsystem (16 KB RAM, 32 KB ROM) handles runtime configuration, BC v1.2 charging state machine, vendor-command execution (e.g., USB-to-I2C bridge), and GPIO-controlled overcurrent protection, power enable, and LED indicators. Configuration is supported via pin-straps, eFuse, or I2C EEPROM - with no external configuration memory required in default mode.
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 4 DS ports and US port |
| Downstream Ports | 4 × USB 3.2 Gen 1 ports, each with dedicated High-Speed transaction translator (Multi-TT) |
| Battery Charging | USB BC v1.2 compliant on all DS ports; supports ghost charging (DCP emulation without US host) |
| CPU Core | ARM® Cortex®-M0 @ up to 50 MHz; 16 KB SRAM, 32 KB ROM for firmware and descriptor handling |
| Configuration Interface | Pin-strap configurable VID/PID, port count, power switch ganging/individual control, and charging enable |
| Operating Temperature | Industrial range: –40°C to +85°C; qualified for embedded and docking applications |
| Package Type | 88-pin QFN (10 mm × 10 mm × 1.0 mm); exposed thermal pad for enhanced thermal performance |
Pinout & Package
CYUSB3314-88LTXCT is housed in an 88-pin QFN package (10 mm × 10 mm × 1.0 mm) with 0.5 mm pitch and exposed thermal pad. Pin functions are defined per Infineon datasheet Rev. *V (001-73643), Section 5 "Pin Information".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| US_DP / US_DM | Upstream differential pair | Connects to host controller; carries bidirectional SS + USB 2.0 data; requires controlled impedance routing |
| DS1_DP / DS1_DM … DS4_DP / DS4_DM | Downstream differential pairs | Each pair serves one DS port; supports simultaneous SS and USB 2.0 signaling via shared-link capability |
| VDD_3P3 / VDD_1P2 | Power supply rails | 3.3 V I/O and 1.2 V core supplies; decoupling required per datasheet layout guidelines |
| I2C_SDA / I2C_SCL | I2C interface signals | Supports EEPROM configuration, firmware update, and USB-to-I2C bridging; 3.3 V tolerant |
| GPIO[0:7] | Configurable general-purpose I/O | Programmable for overcurrent detection, power switch control, LED drivers, or custom status signaling |
| RESET_N | Active-low reset input | Synchronous deassertion required after power stabilization; initiates full hardware initialization sequence |
Key Features
| Feature | Design Value |
|---|---|
| Shared Link Mode | Enables concurrent connection of one SS device and one USB 2.0 device per DS port - doubling effective device count to eight in embedded systems |
| Ghost Charging | Each DS port emulates a Dedicated Charging Port (DCP) when upstream host is absent - enabling battery charging without host enumeration |
| ACA-Dock Support | Allows smartphone/tablet acting as USB host to simultaneously charge and transfer data via accessory charger adapter dock |
| Vendor Command Engine | Executes custom USB requests to implement USB-to-I2C bridge, enabling in-system programming of external EEPROM or ASSP firmware |
| Pin-Strap Configuration | Eliminates need for external EEPROM in basic setups - VID, PID, port enablement, and power switch polarity set at boot via hardwired pins |
Applications
| Docking Station | Industrial Monitor |
|---|---|
|
Use Scenario: A compact desktop docking station connects laptop to multiple peripherals including SSD, webcam, and Ethernet adapter. IC Role / Device Role / Timing Role: Hub controller managing concurrent 5 Gbps SSD transfers and USB 2.0 webcam streaming while maintaining separate transaction translators per port. Use Value: Eliminates bandwidth contention between high-speed storage and latency-sensitive video; enables seamless plug-and-play without host re-enumeration. |
Use Scenario: An industrial-grade monitor integrates USB hub to support keyboard, barcode scanner, and service dongle in factory-floor HMI systems. IC Role / Device Role / Timing Role: Embedded hub providing isolated, ESD-hardened USB 2.0/3.0 connectivity with guaranteed –40°C to +85°C operation and shared-link support for dual peripheral attachment. Use Value: Reduces BOM by integrating termination, power control, and charging logic - avoiding discrete resistors, switches, and charging ICs. |
| Set-Top Box | Hand-Held Cradle |
|
Use Scenario: A 4K set-top box provides USB expansion for external HDD, wireless adapter, and firmware update dongle. IC Role / Device Role / Timing Role: USB 3.2 Gen 1 hub delivering sustained 400+ MB/s throughput to HDD while maintaining low-latency HID responsiveness for remote control dongle. Use Value: Achieves full USB 3.0 bandwidth utilization with integrated link power management (U1/U2), reducing system idle power by >30% vs. legacy hubs. |
Use Scenario: A medical handheld cradle charges and communicates with diagnostic tablet via single USB-C cable. IC Role / Device Role / Timing Role: Hub enabling ACA-Dock mode: tablet acts as host while receiving 5 V/1.5 A charging through same port used for data transfer. Use Value: Supports simultaneous charging and data sync without protocol negotiation overhead - critical for time-sensitive diagnostic data upload. |
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 |
|---|---|---|---|
| CYUSB3312-88LTXCT | 2-port variant; identical 88-QFN package, same CPU, BC v1.2, and shared-link support | Lower port count reduces PCB area and power; suitable where only two downstream devices are needed | Select when system design requires exactly two DS ports and space/power constraints favor minimal footprint |
| CYUSB3324-88LTXCT | 4-port with ACA-Dock support enabled; adds dual-role capability for tablet-as-host scenarios | Required for accessories needing simultaneous charging + data transfer when tablet is upstream host | Choose only if ACA-Dock functionality is mandatory; otherwise CYUSB3314 offers lower cost and simpler configuration |
Compared with CYUSB3312-88LTXCT, CYUSB3314 offers double the downstream port count without increasing package size; versus CYUSB3324, it omits ACA-Dock circuitry - reducing complexity and cost where tablet-as-host operation is unnecessary.
Availability
CYUSB3314-88LTXCT is available at Aetrix Electronics and suitable for docking stations, industrial monitors, and set-top boxes requiring stable component supply, industrial temperature operation, and USB 3.2 Gen 1 compliance.
Supply support for CYUSB3314-88LTXCT 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 IoT markets.
CYUSB3314 belongs to the EZ-USB™ HX3 family - designed specifically for embedded USB hub applications demanding integrated intelligence, flexible configuration, and robust charging capabilities in space-constrained systems.
FAQ
Does CYUSB3314-88LTXCT require an external EEPROM for basic operation?
No. The device supports pin-strapped configuration for VID/PID, port enablement, and power switch control - eliminating external EEPROM in default configurations. I2C EEPROM is optional for advanced customization, firmware updates, or dynamic descriptor changes during runtime.
What is the maximum sustained data throughput per downstream port?
Each downstream port supports full USB 3.2 Gen 1 bandwidth: up to 5 Gbps raw signaling rate, translating to ~400–450 MB/s sustained host-to-device throughput under typical protocol overhead and system-level constraints - confirmed by USB-IF TID# 330000060 certification testing.
Can CYUSB3314-88LTXCT operate in USB 2.0-only mode without SuperSpeed negotiation?
Yes. The device automatically falls back to USB 2.0 High-Speed (480 Mbps) operation on any port where SS lane handshake fails or is disabled. USB 2.0 functionality remains fully active - including Multi-TT, LPM, and BC v1.2 charging - independent of SS link status.
Is ghost charging compatible with Apple MFi-certified accessories?
Yes. CYUSB3314-88LTXCT explicitly supports Apple charging protocols on all downstream ports per datasheet Section 4.2, enabling 2.4 A charging for iPhones and iPads even when no upstream host is present - without requiring MFi authentication circuitry.
CYUSB3314-88LTXCT 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)
CYUSB3314-88LTXCT FAQ
1.How can I place an order for CYUSB3314-88LTXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CYUSB3314-88LTXCT 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 CYUSB3314-88LTXCT reliable?
The price and inventory of CYUSB3314-88LTXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYUSB3314-88LTXCT is usually 5 days.
3.What payment methods are accepted for CYUSB3314-88LTXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYUSB3314-88LTXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYUSB3314-88LTXCT?
CYUSB3314-88LTXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYUSB3314-88LTXCT 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 CYUSB3314-88LTXCT?
For technical support, including CYUSB3314-88LTXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYUSB3314-88LTXCT requirements.
6.How does Aetrix verify that CYUSB3314-88LTXCT is sourced from the original manufacturer or authorized distributors?
All CYUSB3314-88LTXCT 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 CYUSB3314-88LTXCT meets industry standards.
7.What is the process for return or replacement of CYUSB3314-88LTXCT?
All CYUSB3314-88LTXCT units undergo pre-shipment inspection (PSI). If there is an issue with CYUSB3314-88LTXCT, 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 CYUSB3314-88LTXCT part is unused and in its original packaging.
Return procedure for CYUSB3314-88LTXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CYUSB3314-88LTXCT 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
Infineon Technologies
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CYPD3125-40LQXIT
Infineon Technologies
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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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