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Texas Instruments TUSB8040RKMR
- Part No.:
- TUSB8040RKMR
- Manufacturer:
- Texas Instruments
- Category:
- Controllers
- Package:
- -
- Datasheet:
-
TUSB8040RKMR.pdf
- Description:
- TUSB8040 SUPERSPEED USB (USB 3.0
- Quantity:
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- Shipping:
Inventory:2,615
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Product details
Overview
TUSB8040RKMR from Texas Instruments is a USB 3.0-compliant four-port hub IC supporting simultaneous SuperSpeed (5 Gbps), High-Speed (480 Mbps), and Full-Speed/Low-Speed (12/1.5 Mbps) upstream connectivity, with per-port SuperSpeed/HS/FS/LS downstream capability, integrated Multi-Transaction Translator (MTT), and industrial temperature range (–40°C to 85°C) operation in a 100-pin QFN package - deployed in embedded docking stations, industrial USB expansion modules, and multi-peripheral test fixtures.
For engineers reviewing the TUSB8040RKMR datasheet, TUSB8040RKMR pinout, TUSB8040RKMR application, or TUSB8040RKMR equivalent, key selection criteria include per-port power switching support, Battery Charging 1.2 compliance, I²C/SMBus configurability for VID/PID/strings, 24-MHz single-clock input, and USB 3.0 TID# 330000003 certification.
Technical Context
The TUSB8040RKMR implements a dual-mode USB hub architecture: its USB 3.0 SuperSpeed path operates independently from its USB 2.0 high-speed/full-speed path, each with dedicated PHYs and transaction translators. It integrates four asynchronous endpoint buffers per transaction translator to maximize throughput under mixed-speed traffic.
Configuration is handled via pin strapping, external I²C EEPROM, or SMBus slave interface - enabling runtime customization of vendor/product strings, serial number, port enable/disable states, removable/permanent attachment flags, and battery charging enablement per downstream port. The Device Status and Command Register (F8h) remains write-only and non-EEPROM-modifiable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Compliance | USB 3.0 specification compliant; certified TID# 330000003 - ensures interoperability with host controllers and devices across SuperSpeed, HS, FS, and LS modes. |
| Port Count | Four configurable downstream ports - supports reporting 1–4 ports via pin selection or EEPROM, enabling scalable integration in space-constrained designs. |
| Data Rates | Upstream: 5 Gbps (SS), 480 Mbps (HS), 12/1.5 Mbps (FS/LS); Downstream: identical per port - enables mixed-speed peripheral connectivity without protocol translation bottlenecks. |
| Power Switching | Per-port power switching and over-current protection - allows independent port power control and fault isolation, critical for reliable peripheral hot-swap in industrial systems. |
| Configuration Interface | I²C EEPROM or SMBus slave (configurable address) - supports field-updatable VID/PID, manufacturer/product strings, and serial number without firmware changes. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments where thermal stability and long-term reliability are required. |
| Clock Input | Single 24-MHz crystal or oscillator - eliminates need for multiple clock sources and simplifies board layout and BOM. |
Pinout & Package
Package: 100-pin QFN (RKM), 9 mm × 9 mm, 0.5-mm pitch, exposed thermal pad - optimized for thermal dissipation in compact USB hub applications requiring industrial-grade reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| USB_SSTXP_DN0 / USB_SSTXM_DN0 | SuperSpeed TX differential pair (Port 0) | Drives 5-Gbps differential signaling to downstream Port 0; requires controlled 90-Ω impedance routing. |
| USB_SSRXP_DN0 / USB_SSRXM_DN0 | SuperSpeed RX differential pair (Port 0) | Receives 5-Gbps differential signals from Port 0; includes on-die termination for signal integrity. |
| PWRON0z_BATEN0 | Port 0 power-on & battery charge enable | Active-low output controlling external power switch; sampled at reset to configure Battery Charging 1.2 support for Port 0. |
| OVERCUR0z | Port 0 over-current detection input | Active-low interrupt indicating over-current event on Port 0; enables selective port shutdown without affecting other ports. |
| SCL_SMBCLK / SDA_SMBDAT | I²C/SMBus configuration interface | Supports EEPROM programming and runtime register access for custom VID/PID, strings, and port configuration. |
| GRSTz | Global reset input | Asynchronous active-low reset requiring ≥3 ms assertion after power rails stabilize; resets all internal registers to defaults. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-Transaction Translator (MTT) | Four independent TTs (one per port) eliminate bandwidth contention between low-speed/full-speed devices sharing a hub, improving aggregate throughput. |
| Battery Charging 1.2 Support | Enables CDP (Charging Downstream Port) mode per port - allows direct charging of smartphones/tablets without host enumeration delay. |
| Configurable SMBus Address | Allows up to eight TUSB8040RKMR devices on a single SMBus segment - essential for multi-hub chassis or modular backplane architectures. |
| 128-bit UUID | Provides unique device identification for firmware update tracking, asset management, and secure provisioning in fleet-deployed systems. |
| On-board EEPROM Programming | Supports in-system programming via USB 2.0 upstream port - eliminates need for external programmers during manufacturing or field updates. |
Applications
| Industrial Docking Station | Embedded Test Fixture |
|---|---|
Use Scenario: A ruggedized USB 3.0 docking station for factory-floor HMIs connects multiple peripherals including barcode scanners, PLC interfaces, and HD cameras. IC Role / Device Role / Timing Role: TUSB8040RKMR acts as the central USB 3.0 hub controller, managing concurrent SuperSpeed video streaming and HS/FS data acquisition while maintaining deterministic latency. Use Value: Per-port power switching isolates faults during hot-plug events, preventing system-wide USB enumeration failure in mission-critical automation environments. | Use Scenario: Automated test equipment uses a custom PCB to route USB signals from a host PC to 4 DUTs (devices under test) simultaneously. IC Role / Device Role / Timing Role: TUSB8040RKMR serves as a transparent, high-fidelity USB signal distributor with independent port control - enabling parallel functional testing without cross-talk or timing skew. Use Value: Battery Charging 1.2 support allows DUTs with USB-powered logic to be charged and tested concurrently, reducing test cycle time by eliminating separate charging steps. |
| Medical Data Acquisition Hub | Rugged Field Tablet Expansion |
Use Scenario: A portable medical device aggregates data from ECG monitors, pulse oximeters, and infusion pumps via USB before wireless transmission. IC Role / Device Role / Timing Role: TUSB8040RKMR functions as a deterministic, low-jitter USB 2.0/3.0 bridge - ensuring timestamp accuracy and packet ordering for time-sensitive physiological data streams. Use Value: Industrial temperature rating (–40°C to 85°C) and robust over-current protection meet IEC 60601-1 safety requirements for clinical deployment. | Use Scenario: A military-grade tablet uses a snap-on expansion module providing four additional USB-A ports for connecting GPS, radio modems, and rugged storage. IC Role / Device Role / Timing Role: TUSB8040RKMR operates as a compound USB 3.0 device - presenting itself as both a hub and a charging port to maintain compatibility with legacy host drivers. Use Value: Configurable VID/PID and strings via I²C EEPROM enable OEM branding and seamless driver installation across heterogeneous field deployments. |
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 |
|---|---|---|---|
| USB3503A-AEZG | 3-port USB 3.0 hub; integrated 5-V LDO; no per-port power switching - ganged only. | Targeted at cost-sensitive consumer docks; lacks industrial temp rating and CDP support. | Select when BOM cost reduction outweighs per-port control and industrial qualification needs. |
| UPD720202K8-711-BAC-A | 4-port USB 3.0 hub; supports USB 2.0 only on downstream ports; no SuperSpeed downstream capability. | Used in legacy upgrade paths where downstream devices are USB 2.0 only; no 5-Gbps path to peripherals. | Choose when downstream peripherals do not require SuperSpeed bandwidth but full USB 3.0 upstream compatibility is mandatory. |
Compared with USB3503A-AEZG and UPD720202K8-711-BAC-A, the TUSB8040RKMR uniquely delivers full SuperSpeed on all four downstream ports with per-port power management and industrial temperature support - making it the only option for high-bandwidth, fault-tolerant, and thermally demanding embedded USB expansion.
Availability
TUSB8040RKMR is available at Aetrix Electronics and suitable for industrial docking stations, embedded test fixtures, medical data acquisition hubs, and rugged field tablet expansions requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for TUSB8040RKMR 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 technologies with broad industrial, automotive, and communications market reach.
The TUSB8040RKMR belongs to TI's USB connectivity product line, engineered specifically for robust, standards-compliant USB 3.0 hub functionality in space- and reliability-constrained embedded systems.
FAQ
What USB speed modes does the TUSB8040RKMR support on its upstream and downstream ports?
The TUSB8040RKMR 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 speed modes - enabling mixed-speed peripheral connectivity without protocol translation bottlenecks. This capability is confirmed in Section 1.1 of the SLLSE42F datasheet and validated by its USB-IF TID# 330000003 certification.
Does the TUSB8040RKMR support per-port power switching and over-current protection?
Yes, the TUSB8040RKMR supports per-port power switching and over-current protection - a key differentiator from ganged-only alternatives. Pins PWRON0z_BATEN0 through PWRON3z_BATEN3 and OVERCUR0z through OVERCUR3z provide independent control and monitoring for each downstream port. This feature is explicitly documented in Section 1.3 and Table 2-3 of the SLLSE42F datasheet for the RKM package.
Can the TUSB8040RKMR be configured without an external EEPROM?
Yes, the TUSB8040RKMR supports configuration via pin strapping for basic settings (e.g., port enable/disable, removable flag), eliminating the need for external EEPROM in simple applications. However, full customization - including VID/PID, manufacturer/product strings, and serial number - requires either I²C EEPROM or SMBus host programming, as detailed in Sections 3.1–3.2 and Table 2-4 of the SLLSE42F datasheet.
What is the operating temperature range of the TUSB8040RKMR?
The TUSB8040RKMR is rated for industrial temperature operation from –40°C to +85°C. This specification applies specifically to the RKM (100-pin QFN) variant, as stated in Section 1.2 of the SLLSE42F datasheet. The alternate PFP (80-pin QFP) variant is rated for commercial temperature (0°C to 70°C) only.
How does the TUSB8040RKMR handle USB Battery Charging 1.2 compliance?
The TUSB8040RKMR implements Battery Charging 1.2 compliance per downstream port via dedicated BATENx pins (e.g., PWRON0z_BATEN0), which configure the Battery Charging Support Register during reset sampling. This enables Charging Downstream Port (CDP) mode - allowing direct charging of smartphones and tablets without host enumeration. The functionality is verified in Section 1.1 Features and Section 2.3 Pin Descriptions of the SLLSE42F datasheet.
TUSB8040RKMR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- -
- Programmable:
- -
- Protocol:
- -
- Function:
- -
- Interface:
- -
- Standards:
- -
- Voltage - Supply:
- -
- Current - Supply:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- -
- Grade:
- -
- Qualification:
- -
TUSB8040RKMR FAQ
1.How can I place an order for TUSB8040RKMR through Aetrix?
Please submit a Request for Quotation (RFQ) for TUSB8040RKMR 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 TUSB8040RKMR reliable?
The price and inventory of TUSB8040RKMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TUSB8040RKMR is usually 5 days.
3.What payment methods are accepted for TUSB8040RKMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TUSB8040RKMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TUSB8040RKMR?
TUSB8040RKMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TUSB8040RKMR 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 TUSB8040RKMR?
For technical support, including TUSB8040RKMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TUSB8040RKMR requirements.
6.How does Aetrix verify that TUSB8040RKMR is sourced from the original manufacturer or authorized distributors?
All TUSB8040RKMR 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 TUSB8040RKMR meets industry standards.
7.What is the process for return or replacement of TUSB8040RKMR?
All TUSB8040RKMR units undergo pre-shipment inspection (PSI). If there is an issue with TUSB8040RKMR, 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 TUSB8040RKMR part is unused and in its original packaging.
Return procedure for TUSB8040RKMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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