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Texas Instruments TUSB8040A1RKMR
- Part No.:
- TUSB8040A1RKMR
- Manufacturer:
- Texas Instruments
- Category:
- Controllers
- Package:
- 100-WQFN Dual Rows, Exposed Pad
- Datasheet:
-
TUSB8040A1RKMR.pdf
- Description:
- IC HUB CONTROLLER USB 100WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,071
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Product details
Overview
TUSB8040A1 from Texas Instruments is a USB 3.0–compliant four-port hub IC with simultaneous SuperSpeed (5 Gbps) and high-speed (480 Mbps) upstream connectivity, supporting up to four downstream ports each configurable for SuperSpeed, high-speed, full-speed, or low-speed operation; it integrates MTT architecture with four transaction translators and operates across 0°C to 70°C in computer docking stations and monitor hubs.
For engineers reviewing the TUSB8040A1 datasheet, TUSB8040A1 pinout, TUSB8040A1 application, or TUSB8040A1 equivalent, key selection considerations include per-port power switching control, battery charging support (CDP/DCP), SMBus/EEPROM configurability, 100-pin WQFN package layout, and dual-mode USB 2.0/3.0 compound device operation.
Technical Context
The TUSB8040A1 implements a dual-domain architecture: a dedicated USB 2.0 hub with four independent transaction translators (MTT), each backed by four asynchronous endpoint buffers, and a parallel SuperSpeed hub supporting U1/U2 low-power states. Its upstream port dynamically negotiates link speed-enabling or disabling SuperSpeed and high-speed downstream lanes based on upstream electrical environment detection.
Configuration is flexible via pin strapping, I²C EEPROM, or SMBus target interface, allowing runtime control of port enable/disable, removable/permanent attachment status, battery charging enablement, and LED indicator behavior. The device uses a single 24-MHz clock source and supports both ganged and per-port power management with overcurrent detection inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Compliance | USB 3.0 TID #330000037; fully backward compatible with USB 2.0/1.1 |
| Upstream Speed | SuperSpeed (5 Gbps), high-speed (480 Mbps), full-speed (12 Mbps), or low-speed (1.5 Mbps) |
| Downstream Ports | Four configurable ports, each supporting SuperSpeed, high-speed, full-speed, or low-speed |
| Transaction Translators | Four independent TTs (MTT hub), each with four async endpoint buffers for improved throughput vs. USB-minimum two |
| Power Rails | VDD = 1.1 V ±10%, VDD33 = 3.3 V ±10%; typical active current: 46 mA @ 3.3 V / 770 mA @ 1.1 V (4 SS devices, U0) |
| Operating Temperature | 0°C to 70°C ambient; junction temperature up to 105°C |
| Package | 100-pin WQFN (RKM), 9 mm × 9 mm, thermal resistance θJA = 25.6°C/W |
Pinout & Package
Package: 100-pin WQFN (RKM), 9 mm × 9 mm, exposed thermal pad (GND), commercial temperature grade (0°C to 70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| USB_SSTXP_UP / USB_SSTXM_UP | SuperSpeed upstream TX differential pair | Drives 5-Gbps differential signaling to host; requires controlled 90-Ω impedance routing |
| USB_SSRXP_UP / USB_SSRXM_UP | SuperSpeed upstream RX differential pair | Receives 5-Gbps differential signaling from host; AC-coupled with 0.1-µF capacitors |
| USB_DP_UP / USB_DM_UP | USB 2.0 upstream D+/D− | Full-/high-speed transceiver pair; shared physical layer with SuperSpeed but electrically isolated |
| PWRON0z_BATEN0–PWRON3z_BATEN3 | Per-port power/battery charge enable | Active-low control for downstream power switch; sampled at reset to configure CDP/DCP support per port |
| OVERCUR0z–OVERCUR3z | Per-port overcurrent detection input | Active-low signal indicating external overcurrent event; pulled high via 10-kΩ resistor when unused |
| SCL/SMBCLK & SDA/SMBDAT | I²C/SMBus configuration interface | Configurable for EEPROM programming or SMBus host communication; sets VID/PID, strings, and device behavior |
| GRSTz | Global reset input | Asynchronous active-low reset; must be held ≥3 ms after power rails stabilize |
| HS / SS / HS_SUSPEND / SS_SUSPEND | Status outputs | Real-time indication of upstream link state and suspend mode; enables system-level power coordination |
Key Features
| Feature | Design Value |
|---|---|
| Four independent transaction translators | Enables concurrent high-bandwidth transfers across all four downstream ports without bottlenecking at a shared TT |
| Battery charging support (CDP/DCP) | Automatically configures downstream ports as Charging Downstream Port (USB BC 1.2) or Dedicated Charging Port (YD/T 1591-2009) based on upstream connection state |
| Configurable port removability | Each port's RMBL bit (via LEDA_x pins) defines whether attached devices report as removable-critical for compound device enumeration |
| 128-bit UUID provision | Provides unique device identity for firmware updates, secure provisioning, and inventory tracking without external memory |
| Flexible clocking | Accepts either 24-MHz crystal (with internal oscillator + 1-MΩ feedback resistor) or external 24-MHz oscillator on XI/XO pins |
| USB 2.0/3.0 compound mode | Appears as a single logical device to host OS while internally managing separate USB 2.0 and SuperSpeed domains |
Applications
| Computer Docking Stations | External Monitor Hubs |
|---|---|
Use Scenario: A compact desktop dock connects laptop via single USB-C/3.0 cable and expands to multiple peripherals including SSDs, Ethernet, and audio. IC Role / Device Role / Timing Role: TUSB8040A1 acts as the central USB 3.0 hub, managing bandwidth allocation between SuperSpeed storage and high-speed HID devices while maintaining low-latency timing for display data tunneling. Use Value: Enables full utilization of USB 3.0 bandwidth across four downstream ports with MTT architecture, avoiding transaction translator contention seen in single-TT hubs. | Use Scenario: A 4K monitor integrates USB hub functionality to provide peripheral connectivity (keyboard, webcam, headset) alongside video input. IC Role / Device Role / Timing Role: TUSB8040A1 serves as embedded hub controller, coordinating USB 2.0 HID traffic and USB 3.0 auxiliary data (e.g., monitor firmware updates) with precise suspend/resume synchronization to display power states. Use Value: Dual-mode operation allows seamless fallback to USB 2.0 when upstream host lacks SuperSpeed capability-ensuring compatibility without redesign. |
| Set-Top Box Expansion | Industrial Thin Client Terminals |
Use Scenario: A media streaming box adds USB peripherals like wireless adapters, storage drives, and IR blasters via front-panel ports. IC Role / Device Role / Timing Role: TUSB8040A1 functions as managed expansion hub, using per-port PWRONz and OVERCURz signals to isolate faulty devices and maintain system uptime during hot-plug events. Use Value: Ganged power control (via GANGED_SMBA2) simplifies BOM by enabling single MOSFET per port group instead of four discrete switches. | Use Scenario: A fanless industrial terminal requires reliable USB peripheral attachment (barcode scanner, magnetic stripe reader, printer) in temperature-variable environments. IC Role / Device Role / Timing Role: TUSB8040A1 operates as ruggedized hub IC, leveraging its 0°C–70°C rating and robust ESD protection (±1000 V HBM) to withstand factory-floor electrostatic conditions. Use Value: Configurable SMBus address bits (SMBA1–SMBA3) allow daisy-chaining multiple TUSB8040A1 devices on one bus for scalable multi-hub systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB 3.0 hub applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| USB2514B-AEZG | USB 2.0-only quad-port hub; no SuperSpeed support; integrated 3.3-V LDO; smaller 48-QFN package | Targeted at cost-sensitive, bandwidth-limited applications where 480 Mbps suffices and PCB space is constrained | Select when SuperSpeed is unnecessary and lower BOM cost or smaller footprint outweighs future-proofing |
| TUSB8041A1RKM | Pin-compatible variant with identical 100-WQFN package; differs only in internal ROM configuration-supports same features and electrical specs | No functional difference in design-in; used interchangeably in new designs per TI documentation | Valid drop-in alternative with identical pinout, timing, and thermal behavior-no layout or firmware changes required |
Compared with USB2514B-AEZG, the TUSB8040A1 delivers 10× higher bandwidth and native USB 3.0 compliance, while TUSB8041A1RKM offers identical performance with minor ROM-level differentiation-making it a true pin-to-pin replacement for new production builds.
Availability
TUSB8040A1 is available at Aetrix Electronics and suitable for computer docking stations, external monitor hubs, and set-top box expansions requiring stable component supply, long-term lifecycle assurance, and commercial-grade thermal performance.
Supply support for TUSB8040A1 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The TUSB8040A1 belongs to TI's USB Hub IC product line, engineered specifically for high-reliability, multi-port USB 3.0 expansion in space-constrained commercial systems requiring seamless OS compatibility and robust power management.
FAQ
What USB speeds does the TUSB8040A1 support on its upstream and downstream ports?
The TUSB8040A1 supports SuperSpeed (5 Gbps), high-speed (480 Mbps), full-speed (12 Mbps), and low-speed (1.5 Mbps) on its upstream port. Each of its four downstream ports independently supports all four speeds. Downstream SuperSpeed and high-speed capabilities are automatically disabled when the upstream port detects only full-speed or low-speed signaling-ensuring strict USB specification compliance without manual configuration. This behavior is hardwired in the TUSB8040A1 silicon.
Does the TUSB8040A1 require an external EEPROM to operate?
No, the TUSB8040A1 operates without external EEPROM. It boots with default configuration values stored in internal ROM-including VID/PID 0x0451/0x8040 and generic manufacturer/product strings. EEPROM is optional and used only to customize identifiers, enable/disable features (e.g., U1/U2 entry), or configure port-specific attributes like battery charging or removability. The TUSB8040A1 remains fully functional in pin-strapped mode.
How does the TUSB8040A1 handle battery charging for connected devices?
The TUSB8040A1 implements USB Battery Charging Specification 1.2: when the upstream port is connected, it identifies as a Charging Downstream Port (CDP); when upstream is disconnected, it defaults to Dedicated Charging Port (DCP) per YD/T 1591-2009. Per-port BATENx pins (sampled at reset) determine charging enablement. No external charger IC is needed-the TUSB8040A1 directly controls downstream VBUS switching and reports charging capability to the host via standard USB descriptors.
Can the TUSB8040A1 be used in a USB 2.0–only system?
Yes, the TUSB8040A1 operates fully as a USB 2.0 hub when upstream connection is limited to high-speed or lower. Its USB 2.0 domain remains active and compliant-supporting MTT, four transaction translators, and full USB 2.0 feature set-including suspend/resume, remote wakeup, and battery charging-even with no SuperSpeed signaling. The TUSB8040A1 does not require SuperSpeed infrastructure to function, making it backward-compatible across legacy and modern hosts.
What is the purpose of the GRSTz pin on the TUSB8040A1, and how must it be driven?
The GRSTz pin is the global reset input for the TUSB8040A1. It is an active-low, internally pulled-up signal that must be asserted for a minimum of 3 ms after all power rails (VDD and VDD33) reach valid levels. During GRSTz assertion, the TUSB8040A1 is nonfunctional and all internal registers reset to default states. A clean, monotonic deassertion is required-TI recommends using a dedicated reset supervisor IC or RC circuit with ≥3 ms time constant to ensure reliable initialization of the TUSB8040A1.
TUSB8040A1RKMR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-WQFN Dual Rows, Exposed Pad
- Programmable:
- Not Verified
- Protocol:
- USB
- Function:
- Hub Controller
- Interface:
- USB
- Standards:
- USB 3.0
- Voltage - Supply:
- 3V ~ 3.6V
- Current - Supply:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 100-WQFN-MR (9x9)
- Grade:
- -
- Qualification:
- -
TUSB8040A1RKMR FAQ
1.How can I place an order for TUSB8040A1RKMR through Aetrix?
Please submit a Request for Quotation (RFQ) for TUSB8040A1RKMR 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 TUSB8040A1RKMR reliable?
The price and inventory of TUSB8040A1RKMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TUSB8040A1RKMR is usually 5 days.
3.What payment methods are accepted for TUSB8040A1RKMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TUSB8040A1RKMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TUSB8040A1RKMR?
TUSB8040A1RKMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TUSB8040A1RKMR 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 TUSB8040A1RKMR?
For technical support, including TUSB8040A1RKMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TUSB8040A1RKMR requirements.
6.How does Aetrix verify that TUSB8040A1RKMR is sourced from the original manufacturer or authorized distributors?
All TUSB8040A1RKMR 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 TUSB8040A1RKMR meets industry standards.
7.What is the process for return or replacement of TUSB8040A1RKMR?
All TUSB8040A1RKMR units undergo pre-shipment inspection (PSI). If there is an issue with TUSB8040A1RKMR, 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 TUSB8040A1RKMR part is unused and in its original packaging.
Return procedure for TUSB8040A1RKMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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