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Texas Instruments TUSB8042RGCT
- Part No.:
- TUSB8042RGCT
- Manufacturer:
- Texas Instruments
- Category:
- Controllers
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
TUSB8042RGCT.pdf
- Description:
- IC USB HUB CONTROLLER 64VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:405
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Product details
Overview
TUSB8042RGCT from Texas Instruments is a four-port USB 3.1 Gen1 hub IC supporting simultaneous SuperSpeed (5 Gbps), high-speed (480 Mbps), full-speed (12 Mbps), and low-speed (1.5 Mbps) operation across upstream and downstream ports. It integrates Multi-Transaction Translator (MTT) architecture with four independent transaction translators, supports per-port/ganged power switching, and delivers battery charging compliance including BC1.2 CDP/DCP modes and YD/T 1591-2009. It is deployed in docking stations and monitors requiring robust USB topology expansion.
For engineers reviewing the TUSB8042RGCT datasheet, TUSB8042RGCT pinout, TUSB8042RGCT application, or TUSB8042RGCT equivalent, key selection criteria include SuperSpeed USB 3.1 Gen1 hub functionality, MTT-based USB 2.0 compatibility, 64-pin VQFN (RGC) package constraints, battery charging mode configurability via BATEN pins, and dual-supply operation at 1.1 V (VDD) and 3.3 V (VDD33).
Technical Context
The TUSB8042RGCT implements a USB 3.1 Gen1 hub controller with integrated USB 2.0 MTT architecture-four independent transaction translators enable concurrent high-speed/full-speed transfers across all four downstream ports. Its upstream port dynamically negotiates SuperSpeed, high-speed, or full-speed/low-speed connectivity based on host capability, disabling higher-speed layers when lower-speed-only environments are detected.
It supports flexible power management via eight dedicated control/detection pins (PWRCTL1–4/BATEN1–4 and OVERCUR1z–4z), enabling per-port or ganged switching with over-current protection. Battery charging is implemented through hardware-strapped or register-configurable DCP, CDP, and ACP modes-including Galaxy Charging and YD/T 1591-2009 compliance-with automatic mode transitions when upstream is unconnected.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Standard | USB 3.1 Gen1 (5 Gbps) + USB 2.0 compliant hub with MTT architecture |
| Port Count | 1 upstream + 4 downstream ports, all supporting SuperSpeed/HS/FS/LS |
| Supply Voltages | VDD = 0.99–1.26 V (1.1 V nominal); VDD33 = 3.0–3.6 V (3.3 V nominal) |
| Operating Temperature | 0°C to +70°C ambient (commercial grade) |
| Package | 64-pin VQFN (RGC), 9.0 mm × 9.0 mm, thermal pad required |
| Power Consumption | Up to 672 mA total (45 mA @ VDD33 + 672 mA @ VDD) in active 4-SS-device U0 mode |
| Battery Charging | Per-port BC1.2 CDP/DCP support; DCP complies with YD/T 1591-2009; ACP1–ACP3 & auto-mode |
Pinout & Package
Package: 64-pin VQFN (RGC), 9.0 mm × 9.0 mm body size, exposed thermal pad (VSS) requiring PCB ground connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| USB_SSTXP_UP / USB_SSTXM_UP | Upstream SuperSpeed differential transmitter | Drives 5-Gbps differential signaling to host; requires controlled 90-Ω impedance routing |
| USB_SSRXP_UP / USB_SSRXM_UP | Upstream SuperSpeed differential receiver | Receives 5-Gbps differential signals from host; AC-coupled with 100-nF capacitors |
| PWRCTL1–4 / BATEN1–4 | Port power control & battery charging enable | Configures per-port power switch polarity and enables BC1.2 charging mode at reset sampling |
| OVERCUR1z–4z | Downstream over-current detection inputs | Active-low signals indicating over-current events; used for automatic port shutdown in fault conditions |
| SCL/SMBCLK & SDA/SMBDAT | I²C/SMBus interface | Supports EEPROM configuration (VID/PID/port strings) and runtime register access at 100/400 kHz |
Key Features
| Feature | Design Value |
|---|---|
| Four-port USB 3.1 Gen1 hub | Enables single-chip expansion of USB host connectivity with full backward compatibility to USB 2.0/1.1 devices |
| Multi-Transaction Translator (MTT) | Four independent TTs eliminate bandwidth contention between downstream USB 2.0 devices sharing same hub |
| Per-port power switching & over-current protection | Isolates faults to individual downstream ports without disrupting other connected peripherals |
| BC1.2-compliant battery charging | Supports CDP (upstream-connected), DCP (upstream-unconnected), and ACP auto-mode for universal mobile device charging |
| Flexible configuration interface | OTP ROM, I²C EEPROM, or SMBus slave interface enables field-programmable VID/PID, port behavior, and string descriptors |
Applications
| Computer Docking Stations | USB-C Monitor Hubs |
|---|---|
|
Use Scenario: Expanding a laptop's single USB-C port into multiple USB-A, HDMI, Ethernet, and SD card interfaces. IC Role / Device Role / Timing Role: USB 3.1 Gen1 hub managing concurrent SuperSpeed data (e.g., external SSD), high-speed peripherals (keyboard/mouse), and battery charging for attached tablets. Use Value: Enables full-bandwidth peripheral aggregation without USB 2.0 bottlenecking; MTT ensures independent bandwidth allocation per downstream port. |
Use Scenario: Embedded hub in a monitor providing USB upstream to host PC and downstream ports for keyboard, webcam, and smartphone charging. IC Role / Device Role / Timing Role: Acts as compound USB device: upstream SuperSpeed link to PC, downstream ports delivering BC1.2-compliant charging and HS data to peripherals. Use Value: Eliminates need for separate charging ICs; DCP/CDP auto-detection ensures reliable fast charging regardless of host connection state. |
| Set-Top Box Expansion | Industrial Control Panel |
|
Use Scenario: Adding USB storage, HID controllers, and firmware update capability to media streaming hardware. IC Role / Device Role / Timing Role: USB hub bridging SoC USB controller to external peripherals while maintaining low-latency HID response and bulk storage throughput. Use Value: Dual-supply (1.1 V / 3.3 V) operation reduces system power; ganged power mode simplifies external switch design for cost-sensitive consumer units. |
Use Scenario: Reliable peripheral connectivity in factory HMIs where ESD immunity and thermal stability are critical. IC Role / Device Role / Timing Role: Robust USB hub with ±2000-V HBM ESD rating and junction temperature range up to +105°C for continuous industrial operation. Use Value: Thermal resistance RθJB = 5.3°C/W enables stable performance on standard 2-layer PCBs without heatsinks or forced airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB 3.1 Gen1 hub applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Microchip USB5744 | 4-port USB 3.0 hub; no native USB 3.1 Gen1 (5 Gbps) support; uses single TT instead of MTT | Limited to 480 Mbps USB 2.0 bandwidth sharing across all ports; no BC1.2 DCP auto-mode | Select when SuperSpeed is not required and cost sensitivity outweighs per-port USB 2.0 performance isolation |
| Renesas uPD720210 | 4-port USB 3.0 hub with MTT; supports PCIe-to-USB bridge function; larger 128-pin LQFP package | Requires PCIe host interface; not a standalone USB-upstream hub; higher BOM and layout complexity | Select only when integrating USB hub with PCIe host controller; unsuitable as direct drop-in replacement for USB-upstream designs |
Compared with Microchip USB5744 and Renesas uPD720210, the TUSB8042RGCT uniquely combines USB 3.1 Gen1 speed, MTT-based USB 2.0 concurrency, BC1.2 auto-mode charging, and compact 64-pin QFN packaging-making it optimal for space-constrained, high-integration docking and display applications requiring full-speed USB 2.0 device coexistence.
Availability
TUSB8042RGCT is available at Aetrix Electronics and suitable for computer docking stations, USB-C monitor hubs, and set-top box expansion requiring stable component supply, long-term lifecycle support, and commercial-grade thermal performance.
Supply support for TUSB8042RGCT 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
Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and connectivity solutions with leadership in USB, power management, and signal chain technologies.
The TUSB8042RGCT belongs to TI's USB Hub IC product line, engineered specifically for high-density, low-power USB 3.1 Gen1 expansion in space-constrained consumer and industrial systems requiring seamless USB 2.0/3.x interoperability.
FAQ
What USB standards does the TUSB8042RGCT support?
The TUSB8042RGCT supports USB 3.1 Gen1 (5 Gbps SuperSpeed), USB 2.0 (480 Mbps high-speed), USB 1.1 (12 Mbps full-speed and 1.5 Mbps low-speed). It operates as a compound device, enabling simultaneous SuperSpeed and high-speed connections on the upstream port while supporting mixed-speed downstream devices. The TUSB8042RGCT automatically disables SuperSpeed or high-speed layers when upstream electrical environment limits negotiation-ensuring robust fallback to compatible speeds.
How does the TUSB8042RGCT implement battery charging support?
The TUSB8042RGCT implements battery charging per USB Battery Charging Specification 1.2 (BC1.2), supporting Charging Downstream Port (CDP) mode when upstream is connected, Dedicated Charging Port (DCP) mode when upstream is unconnected-and DCP compliance with Chinese standard YD/T 1591-2009. It also provides ACP1–ACP3 divider modes and automatic transition between them. Configuration is determined at reset via BATEN1–4 pins or programmable registers, and the TUSB8042RGCT supports Galaxy Charging for legacy Samsung devices.
What is the significance of the Multi-Transaction Translator (MTT) architecture in the TUSB8042RGCT?
The MTT architecture in the TUSB8042RGCT allocates four independent transaction translators-one per downstream port-eliminating USB 2.0 bandwidth contention. Unlike single-TT hubs where all downstream ports share one translator, the TUSB8042RGCT allows concurrent high-speed isochronous or interrupt transfers (e.g., audio + HID + storage) without latency or throughput degradation. This ensures deterministic performance critical in docking stations and professional audio/video equipment using the TUSB8042RGCT.
Can the TUSB8042RGCT operate with only USB 2.0 upstream connectivity?
Yes-the TUSB8042RGCT fully supports USB 2.0-only upstream connections. When upstream detects only high-speed or full-speed/low-speed capability, it disables SuperSpeed functionality on all downstream ports but continues full USB 2.0 hub operation-including MTT-based concurrent transfers and battery charging. In full-speed/low-speed-only upstream scenarios, both SuperSpeed and high-speed layers are disabled, leaving only full-speed/low-speed hub functionality active. This ensures backward compatibility across legacy hosts while preserving TUSB8042RGCT's core hub intelligence.
What package and thermal considerations apply to the TUSB8042RGCT?
The TUSB8042RGCT uses a 64-pin VQFN (RGC) package measuring 9.0 mm × 9.0 mm with an exposed thermal pad (VSS) that must be soldered to a solid PCB ground plane. Its thermal metrics include RθJB = 5.3°C/W (junction-to-board) and RθJA = 26°C/W (junction-to-ambient), enabling operation up to +70°C ambient without forced cooling. For reliable thermal performance, the TUSB8042RGCT requires ≥4 thermal vias under the pad connected to inner ground planes, per TI layout guidelines.
TUSB8042RGCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 64-VFQFN Exposed Pad
- Programmable:
- Not Verified
- Protocol:
- USB
- Function:
- Hub Controller
- Interface:
- USB, GPIO, I2C, SMBus
- Standards:
- USB 3.0
- Voltage - Supply:
- 1.1V, 3.3V
- Current - Supply:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 64-VQFN (9x9)
- Grade:
- -
- Qualification:
- -
TUSB8042RGCT FAQ
1.How can I place an order for TUSB8042RGCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TUSB8042RGCT 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 TUSB8042RGCT reliable?
The price and inventory of TUSB8042RGCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TUSB8042RGCT is usually 5 days.
3.What payment methods are accepted for TUSB8042RGCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TUSB8042RGCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TUSB8042RGCT?
TUSB8042RGCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TUSB8042RGCT 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 TUSB8042RGCT?
For technical support, including TUSB8042RGCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TUSB8042RGCT requirements.
6.How does Aetrix verify that TUSB8042RGCT is sourced from the original manufacturer or authorized distributors?
All TUSB8042RGCT 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 TUSB8042RGCT meets industry standards.
7.What is the process for return or replacement of TUSB8042RGCT?
All TUSB8042RGCT units undergo pre-shipment inspection (PSI). If there is an issue with TUSB8042RGCT, 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 TUSB8042RGCT part is unused and in its original packaging.
Return procedure for TUSB8042RGCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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