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Texas Instruments TUSB8040ARKMR
- Part No.:
- TUSB8040ARKMR
- Manufacturer:
- Texas Instruments
- Category:
- Controllers
- Package:
- 100-WQFN Dual Rows, Exposed Pad
- Datasheet:
-
TUSB8040ARKMR.pdf
- Description:
- IC HUB CONTROLLER USB 100WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,786
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Product details
Overview
TUSB8040ARKMR from Texas Instruments is a four-port USB 3.0 hub IC supporting simultaneous SuperSpeed (5 Gbps), high-speed (480 Mbps), full-speed (12 Mbps), and low-speed (1.5 Mbps) connectivity on all downstream ports, with integrated Multi-Transaction Translator (MTT), battery charging support (CDP/DCP), and 100-pin QFN packaging - deployed in docking stations, monitors, and set-top boxes.
For engineers reviewing the TUSB8040ARKMR datasheet, TUSB8040ARKMR pinout, TUSB8040ARKMR application, or TUSB8040ARKMR equivalent, key selection considerations include per-port/ganged power switching, SMBus/I²C programmable VID/PID/strings, 24-MHz single-clock input, USB 2.0/3.0 compound device capability, and SuperSpeed upstream/downstream signal integrity requirements.
Technical Context
The TUSB8040ARKMR implements a dual-domain architecture: a USB 3.0 hub controller handling SuperSpeed packet routing and link training, and a separate USB 2.0 hub controller with four independent Transaction Translators (one per port) and four asynchronous endpoint buffers per TT - exceeding USB 2.0's minimum two-buffer requirement for improved throughput.
It supports flexible configuration via pin strapping, external I²C EEPROM, or SMBus slave interface - enabling runtime customization of port enable/disable state, removable/permanent attachment flag, battery charging enable, and vendor-specific identifiers (VID/PID/strings), while retaining a fixed 128-bit UUID and dedicated status outputs for SS/HS upstream connection and suspend states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Compliance | USB 3.0 (SuperSpeed) and USB 2.0 compliant; TID# 330000037 certified |
| Data Rates | Upstream: 5 Gbps (SS), 480 Mbps (HS), 12/1.5 Mbps (FS/LS); Downstream: same per port |
| Port Count | 1 upstream + 4 downstream USB ports; configurable to report 1–4 active downstream ports |
| Power Management | Per-port or ganged power switching; individual over-current detection inputs (OVERCUR0z–OVERCUR3z) |
| Configuration Interface | I²C/SMBus slave (SCL/SDA) or pin-strapped; supports custom VID/PID, strings, and battery charging mode |
| Clock Input | Single 24-MHz crystal or oscillator (XI/XO); no PLL required - simplifies BOM and layout |
| Operating Temp | 0°C to +70°C commercial grade - suitable for desktop peripherals and embedded consumer systems |
| Supply Voltages | VDD33 = 3.3 V ±10%, VDD18 = 1.8 V ±10%, VDD11 = 1.1 V ±10%, VDDA33 = 3.3 V analog |
Pinout & Package
Package: 100-pin QFN (12 mm × 12 mm, 0.5-mm pitch), thermally enhanced with exposed thermal pad (VSS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| USB_SSTXP_UP / USB_SSTXM_UP | Upstream SuperSpeed TX differential pair | Drives 5-Gbps differential signals to host controller; requires controlled 90-Ω impedance routing |
| USB_SSRXP_UP / USB_SSRXM_UP | Upstream SuperSpeed RX differential pair | Receives 5-Gbps differential signals from host; includes built-in equalization and lane deskew |
| USB_DP_UP / USB_DM_UP | Upstream USB 2.0 HS/FS/LS transceiver | Full backward compatibility; shares same physical port as SuperSpeed path (dual-lane operation) |
| PWRON0z_BATEN0 – PWRON3z_BATEN3 | Per-port power/battery charge control | Configures port power enable and CDP/DCP mode at reset de-assertion; supports ganged mode via SMBA2 |
| OVERCUR0z – OVERCUR3z | Per-port over-current sense inputs | Active-low open-drain inputs; require external pull-up; trigger automatic port power disable on fault |
| SCL/SMBCLK & SDA/SMDAT | I²C/SMBus configuration interface | Allows runtime reprogramming of VID/PID, strings, port attributes; configurable SMBus address |
| GRSTz | Global reset input | Asynchronous active-low reset; must be held ≥3 ms after all supplies stabilize |
| XI / XO / VSSOSC | 24-MHz clock interface | Supports crystal (with 1-MΩ feedback resistor) or external oscillator; VSSOSC isolated from PCB ground |
Key Features
| Feature | Design Value |
|---|---|
| Four independent Transaction Translators | Enables concurrent high-bandwidth transfers across all four downstream ports without bottlenecking |
| Four asynchronous endpoint buffers per TT | Exceeds USB 2.0 spec minimum (2/buffer), reducing transaction latency and improving bulk transfer efficiency |
| Battery Charging 1.2 & YD/T 1591-2009 support | Enables CDP mode when upstream connected, DCP mode when upstream disconnected - no host dependency |
| 128-bit UUID and customizable strings | Provides unique device identity and OEM branding capability via I²C/SMBus or EEPROM programming |
| USB 2.0/3.0 compound device operation | Appears as single logical device to host OS while internally managing dual-speed protocol stacks |
| Status output pins (SS/HS connection/suspend) | Enables real-time hardware monitoring of upstream link state without software polling or register reads |
Applications
| Computer Docking Stations | USB-C Monitor Hubs |
|---|---|
|
Use Scenario: A compact docking station provides USB 3.0 data, video (via DisplayLink), and charging to laptops via single USB-C uplink. IC Role / Device Role / Timing Role: TUSB8040ARKMR acts as the primary USB 3.0 hub controller, managing bandwidth allocation, power delivery negotiation, and legacy USB 2.0 peripheral support. Use Value: Enables four independent high-speed peripherals (SSD, Ethernet, webcam, audio) to operate concurrently without throughput collapse due to MTT + 4-buffer-per-TT architecture. |
Use Scenario: A 4K monitor integrates USB 3.0 hub functionality to expand connectivity for keyboards, mice, storage, and headsets alongside video input. IC Role / Device Role / Timing Role: TUSB8040ARKMR serves as the embedded USB hub, synchronizing with monitor's internal microcontroller via SMBus for dynamic port configuration and LED status reporting. Use Value: Delivers deterministic low-latency response for HID devices and sustained 300+ MB/s throughput to SSDs using dedicated per-port TT resources. |
| Set-Top Box Expansion | Digital Signage Media Players |
|
Use Scenario: An Android-based set-top box adds external storage, wireless dongles, and firmware update capability via rear-panel USB ports. IC Role / Device Role / Timing Role: TUSB8040ARKMR functions as the system-level USB expansion hub, interfacing with SoC's xHCI controller and managing power-aware port enumeration. Use Value: Supports hot-plug detection, battery charging for remote peripherals, and robust over-current protection - critical for unattended consumer deployments. |
Use Scenario: A fanless digital signage player uses USB ports for content updates, peripheral control (touch overlay, IR receiver), and diagnostics. IC Role / Device Role / Timing Role: TUSB8040ARKMR operates as a managed USB subsystem, configured via I²C EEPROM to lock down port roles (e.g., Port 0 = read-only update, Port 3 = service only). Use Value: Ensures secure, predictable peripheral behavior through immutable pin-strapped or EEPROM-defined port attributes - preventing accidental misconfiguration in field units. |
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 |
|---|---|---|---|
| Microchip USB5744 | 4-port USB 3.0 hub in 128-pin QFN; supports USB 3.1 Gen 1 but lacks native Battery Charging 1.2 DCP mode | Requires external charging controller for DCP; better suited for industrial systems needing extended temp range (–40°C to +85°C) | Select USB5744 when higher thermal margin or USB 3.1 compliance is prioritized over integrated charging logic. |
| Renesas uPD720210 | 4-port USB 3.0 hub in 128-pin LQFP; includes integrated USB 2.0 PHY but no SMBus/I²C configuration interface | Relies on strap pins only - no runtime reconfiguration of VID/PID or strings; limited port customization flexibility | Select uPD720210 when fixed-function, cost-sensitive designs eliminate need for field-programmable identifiers or battery charging modes. |
Compared with USB5744 and uPD720210, the TUSB8040ARKMR uniquely combines pin-strappable + I²C/SMBus configurability, native Battery Charging 1.2/DCP support, and per-port MTT buffering - making it optimal for consumer-facing products requiring branding, charging interoperability, and flexible port management.
Availability
TUSB8040ARKMR 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 traceable sourcing for production programs.
Supply support for TUSB8040ARKMR 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 interface ICs.
The TUSB8040ARKMR belongs to TI's USB 3.0 hub product line, designed specifically for high-reliability, feature-rich peripheral expansion in consumer and commercial computing systems - emphasizing ease of integration, regulatory compliance, and out-of-box interoperability.
FAQ
What USB speed modes does the TUSB8040ARKMR support on its downstream ports?
The TUSB8040ARKMR supports SuperSpeed (5 Gbps), high-speed (480 Mbps), full-speed (12 Mbps), and low-speed (1.5 Mbps) on each of its four downstream ports. Upstream port similarly supports all four modes. Mode selection is automatic based on upstream connection capability - if upstream only supports HS/FS/LS, downstream SuperSpeed is disabled.
Does the TUSB8040ARKMR require an external EEPROM to function?
No, the TUSB8040ARKMR operates without external EEPROM. Default configuration is set by pin strapping (e.g., PWRONz, LEDAz, GANGEDz). EEPROM or SMBus is optional for custom VID/PID, manufacturer/product strings, serial number, and advanced port attributes - not required for basic hub operation.
How does battery charging work on the TUSB8040ARKMR?
The TUSB8040ARKMR implements Battery Charging 1.2: when upstream is connected, ports operate as Charging Downstream Ports (CDP); when upstream is disconnected, ports become Dedicated Charging Ports (DCP) compliant with YD/T 1591-2009. Configuration is controlled per port via PWRONz_BATENz pins or SMBus registers.
What is the purpose of the GRSTz pin on the TUSB8040ARKMR?
GRSTz is the global reset input for the TUSB8040ARKMR. It is active-low and internally pulled up. When asserted, it resets all internal registers to default values and halts all USB functionality. TI specifies GRSTz must be held active for ≥3 ms after all power rails (VDD33, VDD18, VDD11) reach valid levels before release.
Can the TUSB8040ARKMR be used in USB 2.0-only systems?
Yes, the TUSB8040ARKMR fully supports USB 2.0-only operation. When upstream connection lacks SuperSpeed capability, the device disables SS lanes and functions as a standard USB 2.0 MTT hub with four independent Transaction Translators - maintaining full backward compatibility and performance advantages over STT hubs.
TUSB8040ARKMR 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:
- 1.1V, 3.3V
- Current - Supply:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 100-WQFN-MR (9x9)
- Grade:
- -
- Qualification:
- -
TUSB8040ARKMR FAQ
1.How can I place an order for TUSB8040ARKMR through Aetrix?
Please submit a Request for Quotation (RFQ) for TUSB8040ARKMR 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 TUSB8040ARKMR reliable?
The price and inventory of TUSB8040ARKMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TUSB8040ARKMR is usually 5 days.
3.What payment methods are accepted for TUSB8040ARKMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TUSB8040ARKMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TUSB8040ARKMR?
TUSB8040ARKMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TUSB8040ARKMR 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 TUSB8040ARKMR?
For technical support, including TUSB8040ARKMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TUSB8040ARKMR requirements.
6.How does Aetrix verify that TUSB8040ARKMR is sourced from the original manufacturer or authorized distributors?
All TUSB8040ARKMR 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 TUSB8040ARKMR meets industry standards.
7.What is the process for return or replacement of TUSB8040ARKMR?
All TUSB8040ARKMR units undergo pre-shipment inspection (PSI). If there is an issue with TUSB8040ARKMR, 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 TUSB8040ARKMR part is unused and in its original packaging.
Return procedure for TUSB8040ARKMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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