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Texas Instruments TUSB2046BIRHBRG4
- Part No.:
- TUSB2046BIRHBRG4
- Manufacturer:
- Texas Instruments
- Category:
- Controllers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TUSB2046BIRHBRG4.pdf
- Description:
- IC HUB CONTROLLER USB 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,362
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Product details
Overview
TUSB2046BIRHBRG4 from Texas Instruments is a 3.3-V, 4-port USB 2.0 full-speed hub IC with integrated transceivers, digital state-machine architecture (no firmware required), 32-pin VQFN package (5.0 mm × 5.0 mm), and support for both bus-powered and self-powered configurations. It enables compact peripheral expansion in embedded docking stations and industrial USB host interfaces.
For engineers reviewing the TUSB2046BIRHBRG4 datasheet, TUSB2046BIRHBRG4 pinout, TUSB2046BIRHBRG4 application, or TUSB2046BIRHBRG4 equivalent, key selection considerations include its ganged/per-port overcurrent management, 6-MHz crystal–based low-EMI clocking, push-pull PWRON outputs eliminating external pullups, and EEPROM-programmable VID/PID for custom device enumeration.
Technical Context
The TUSB2046BIRHBRG4 implements a fully USB-compliant full-speed hub using hardwired digital logic-not a microcontroller-ensuring deterministic timing and zero firmware overhead. Its upstream port connects to a USB host controller, while four downstream ports auto-negotiate full-speed (12 Mbps) or low-speed (1.5 Mbps) operation per attached device.
Power management is configurable via BUSPWR and EEDATA/GANGED pins, enabling four distinct modes: bus-powered ganged, bus-powered per-port, self-powered ganged, and self-powered per-port. Clocking supports either a 6-MHz crystal (XTAL1/XTAL2) with internal PLL generating 48 MHz/12 MHz, or direct 48-MHz clock input via TSTPLL/48MCLK when TSTMODE = high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Compliance | Full-speed hub (12 Mbps), TID #30220231 certified; no low-speed hub certification claimed. |
| Supply Voltage | 3.3 V nominal (3.0–3.6 V); enables direct connection to standard USB 3.3-V LDO rails without level shifting. |
| Operating Temperature | 0°C to 70°C; qualified for commercial-grade embedded systems, not industrial or automotive. |
| Downstream Ports | Four independent ports supporting automatic full-speed/low-speed slew-rate adaptation per device. |
| Power Switch Control | Push-pull PWRON1–PWRON4 outputs eliminate need for external pullup resistors on power-switch gate drives. |
| Overcurrent Detection | Dedicated OVRCUR1–OVRCUR4 inputs with built-in noise filtering; supports ganged or per-port fault response. |
| Clock Options | 6-MHz crystal (XTAL1/XTAL2) with internal PLL, or 48-MHz external clock (TSTPLL/48MCLK); TSTMODE selects mode. |
Pinout & Package
Package: 32-pin VQFN (RHB), 5.00 mm × 5.00 mm body, 0.5-mm pitch, thermal pad exposed on bottom.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DP0/DM0 | Upstream differential data pair | Connects directly to USB host controller's upstream D+ and D−; requires 90-Ω differential trace routing. |
| DP1–DP4 / DM1–DM4 | Downstream differential data pairs | Each pair serves one downstream port; auto-configures slew rate based on attached device speed. |
| PWRON1–PWRON4 | Active-low power-enable outputs | Push-pull drivers control external 5-V power switches; no external pullups needed. |
| OVRCUR1–OVRCUR4 | Active-low overcurrent sense inputs | Noise-filtered inputs monitor external power switch fault signals; asserted = port power disabled. |
| EXTMEM | EEPROM interface enable | Low = enable EECLK/EEDATA for custom VID/PID loading; high = disable EEPROM, repurpose EEDATA as GANGED. |
| XTAL1/XTAL2 | 6-MHz crystal interface | XTAL1 = input, XTAL2 = output; supports fundamental-mode crystals only; enables low-EMI clocking. |
| TSTMODE | Clock source select | Low = use 6-MHz crystal + internal PLL; high = bypass PLL, use 48-MHz clock on TSTPLL/48MCLK. |
| SUSPND | Suspend status indicator | Active-high open-drain output signals USB suspend state to external power-management logic. |
Key Features
| Feature | Design Value |
|---|---|
| No-firmware state-machine architecture | Eliminates boot time, flash memory, and firmware validation overhead-ideal for cost-sensitive, high-reliability USB hubs. |
| Ganged or per-port power management | Configurable via EEDATA/GANGED pin; enables system-level trade-off between cost (ganged) and robustness (per-port). |
| Integrated USB transceivers | Reduces BOM count by removing four external transceiver ICs; meets USB electrical compliance without external components. |
| Push-pull PWRON outputs | Drives external power switches directly at 3.3 V; removes four 10-kΩ pullup resistors and associated layout area. |
| Crystal-based 6-MHz clock option | Enables low-EMI design with minimal board space; avoids high-frequency clock distribution and associated noise coupling. |
| 3-State EEPROM interface | Allows shared serial EEPROM across multiple devices (e.g., hub + MCU), reducing component count in multi-chip systems. |
Applications
| Desktop Docking Station | Industrial USB Host Adapter |
|---|---|
|
Use Scenario: A compact desktop dock adds four USB-A ports to a laptop via single upstream USB-B connection, supporting keyboard, mouse, printer, and storage simultaneously. IC Role / Device Role / Timing Role: TUSB2046BIRHBRG4 acts as the central full-speed USB repeater hub, managing traffic arbitration, power switching, and suspend/resume signaling between host and peripherals. Use Value: Enables plug-and-play compatibility with all OS USB stacks without driver customization; ganged power mode reduces external power-switch count to one IC. |
Use Scenario: An industrial PLC gateway uses TUSB2046BIRHBRG4 to aggregate legacy USB sensors (barcode scanners, HID devices) onto a single USB host interface with robust overcurrent protection. IC Role / Device Role / Timing Role: TUSB2046BIRHBRG4 serves as a deterministic, firmware-free USB repeater, isolating host-side timing from variable peripheral attach/detach events. Use Value: Per-port OVRCUR inputs allow selective shutdown of faulty sensor ports without disrupting other connected devices-critical for unattended operation. |
| Embedded Monitor Hub | USB Peripheral Expansion Module |
|
Use Scenario: A smart monitor integrates USB hub functionality to provide downstream ports for keyboard, mouse, and webcam-all powered from the monitor's internal 5-V rail. IC Role / Device Role / Timing Role: TUSB2046BIRHBRG4 operates in self-powered mode (BUSPWR = low), sourcing 5-V power to downstream ports via external switches controlled by PWRON outputs. Use Value: Push-pull PWRON outputs drive MOSFET gates directly-eliminating pullup resistors and simplifying PCB layout in space-constrained monitor bezels. |
Use Scenario: A modular USB expansion card for thin-client terminals provides four additional USB-A ports using a single upstream mini-USB connection. IC Role / Device Role / Timing Role: TUSB2046BIRHBRG4 functions as a bus-powered hub (BUSPWR = high), drawing power from the host and distributing it to downstream peripherals. Use Value: Supports both full-speed and low-speed devices natively-enabling mixed-device connectivity (e.g., HID keyboard + full-speed flash drive) without manual configuration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB hub applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TUSB2046BI | Same die, extended temperature range (–40°C to 85°C); identical pinout and electrical specs. | Required for industrial or outdoor deployments where ambient exceeds 70°C. | Select TUSB2046BI when operating temperature must exceed 70°C; otherwise TUSB2046BIRHBRG4 is optimal for commercial environments. |
| USB2422 | Microchip 4-port hub with integrated 5-V power switches; requires no external power-management ICs. | Reduces BOM count but increases supply voltage dependency (requires 5-V rail for internal switches). | Choose USB2422 if board has stable 5-V supply and layout space is constrained; TUSB2046BIRHBRG4 offers greater power architecture flexibility. |
Compared with TUSB2046BI, the TUSB2046BIRHBRG4 trades extended temperature tolerance for lower cost and optimized commercial-grade performance; compared with USB2422, it shifts power-switch complexity to external components-enabling higher efficiency, thermal isolation, and voltage scalability in 5-V rail-limited designs.
Availability
TUSB2046BIRHBRG4 is available at Aetrix Electronics and suitable for desktop docking stations, industrial USB host adapters, and embedded monitor hubs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TUSB2046BIRHBRG4 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 leader specializing in analog, embedded processing, and connectivity solutions, with decades of USB protocol expertise and broad industrial qualification.
The TUSB2046x product line delivers cost-optimized, firmware-free USB 2.0 full-speed hub ICs targeting commercial and industrial embedded systems where reliability, low EMI, and minimal BOM count are critical design requirements.
FAQ
What is the maximum operating temperature of the TUSB2046BIRHBRG4?
The TUSB2046BIRHBRG4 is rated for 0°C to 70°C ambient operation. This commercial-grade specification is confirmed in Section 7.3 (Recommended Operating Conditions) of the TI datasheet SLLS413L. For applications requiring –40°C to 85°C, the pin-compatible TUSB2046BI variant must be used instead. Thermal derating is not supported beyond these limits.
Does the TUSB2046BIRHBRG4 require external firmware or software drivers?
No. The TUSB2046BIRHBRG4 uses a fixed-function digital state machine-not a programmable microcontroller-so no firmware loading, flash programming, or custom drivers are needed. It enumerates as a standard USB hub class device and works seamlessly with Windows, Linux, macOS, and real-time OS USB stacks without modification.
Can the TUSB2046BIRHBRG4 support both full-speed and low-speed USB devices simultaneously?
Yes. All four downstream ports of the TUSB2046BIRHBRG4 automatically detect and adapt to full-speed (12 Mbps) or low-speed (1.5 Mbps) devices connected to them, adjusting slew rate and signal thresholds accordingly. This behavior is implemented in hardware and requires no configuration or host intervention.
What clock sources are supported by the TUSB2046BIRHBRG4?
The TUSB2046BIRHBRG4 supports two clock configurations: (1) a 6-MHz fundamental crystal connected to XTAL1/XTAL2 (TSTMODE = low), with internal PLL generating 48 MHz/12 MHz clocks; or (2) a 48-MHz external clock applied to TSTPLL/48MCLK (TSTMODE = high), bypassing the PLL. Crystals cannot be used in 48-MHz mode.
How does the TUSB2046BIRHBRG4 handle overcurrent protection on downstream ports?
The TUSB2046BIRHBRG4 provides four dedicated OVRCUR1–OVRCUR4 inputs (active-low, noise-filtered) that interface with external power switches (e.g., TPS2044). When configured in per-port mode (EEDATA/GANGED = low), each input controls its corresponding port independently. In ganged mode (EEDATA/GANGED = high), any active OVRCUR disables all four ports.
TUSB2046BIRHBRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 32-VFQFN Exposed Pad
- Programmable:
- Not Verified
- Protocol:
- USB
- Function:
- Hub Controller
- Interface:
- USB
- Standards:
- USB 2.0
- Voltage - Supply:
- 3V ~ 3.6V
- Current - Supply:
- 40mA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 32-VQFN (5x5)
- Grade:
- -
- Qualification:
- -
TUSB2046BIRHBRG4 FAQ
1.How can I place an order for TUSB2046BIRHBRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TUSB2046BIRHBRG4 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 TUSB2046BIRHBRG4 reliable?
The price and inventory of TUSB2046BIRHBRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TUSB2046BIRHBRG4 is usually 5 days.
3.What payment methods are accepted for TUSB2046BIRHBRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TUSB2046BIRHBRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TUSB2046BIRHBRG4?
TUSB2046BIRHBRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TUSB2046BIRHBRG4 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 TUSB2046BIRHBRG4?
For technical support, including TUSB2046BIRHBRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TUSB2046BIRHBRG4 requirements.
6.How does Aetrix verify that TUSB2046BIRHBRG4 is sourced from the original manufacturer or authorized distributors?
All TUSB2046BIRHBRG4 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 TUSB2046BIRHBRG4 meets industry standards.
7.What is the process for return or replacement of TUSB2046BIRHBRG4?
All TUSB2046BIRHBRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TUSB2046BIRHBRG4, 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 TUSB2046BIRHBRG4 part is unused and in its original packaging.
Return procedure for TUSB2046BIRHBRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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