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Texas Instruments TUSB211RWBR
- Part No.:
- TUSB211RWBR
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 12-XFQFN
- Datasheet:
-
TUSB211RWBR.pdf
- Description:
- IC INTERFACE SPECIALIZED 12X2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:10,580
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Product details
Overview
TUSB211RWBR from Texas Instruments is a USB 2.0 High-Speed signal conditioner IC designed to compensate for inter-symbol interference (ISI) loss in DP/DM channels while preserving LS/FS signal integrity. It operates from a single 3.3-V supply, delivers programmable HS gain via external EQ resistor (0–3 levels), supports 480 Mbps data rate, and features non-invasive inline placement without breaking DP/DM trace continuity. Used in notebook docking stations to pass USB-IF HS eye mask compliance at the connector.
For engineers reviewing the TUSB211RWBR datasheet, TUSB211RWBR pinout, TUSB211RWBR application, or TUSB211RWBR equivalent, key selection considerations include its 12-pin X2QFN package, HS-only active compensation, RSTN-controlled enable/disable, EQ-configurable boost level, and dual-port bidirectional HS signal path with CD/ENA_HS status flags.
Technical Context
The TUSB211RWBR implements a patent-pending analog equalization architecture that selectively amplifies high-frequency components of USB HS differential signals (480 Mbps) while leaving LS/FS signaling paths transparent and unaltered. Its internal LDO (VREG) supplies 1.8 V to core circuitry only during HS mode, reducing idle power draw.
Functional modes are fully automatic: LS/FS detection disables compensation and asserts CD; HS detection enables EQ-based boosting and asserts both CD and ENA_HS; RSTN low forces disable mode with zero compensation and no flag output. EQ configuration is latched at power-up and requires RSTN toggle to update.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.0–3.6 V nominal; powers all circuitry including internal 1.8-V LDO (VREG) for HS-mode core |
| HS Data Rate | 480 Mbps; meets USB 2.0 High-Speed specification with <100 ps rise/fall time |
| Active HS Current | 20 mA typical; enables low-power operation in active HS link with 55 mW total consumption |
| EQ Gain Levels | 4 selectable settings (0–3) via external pulldown resistor on EQ pin (0.32–6 kΩ range) |
| Operating Temp | 0°C to +70°C; validated for commercial-grade embedded host-side applications |
| ESD Rating | ±3000 V HBM; ensures robustness against handling and system-level electrostatic discharge |
| Package | 12-pin X2QFN (RWB), 1.6 mm × 1.6 mm; enables dense routing with DP/DM traces passing underneath |
Pinout & Package
The TUSB211RWBR is housed in a 12-pin X2QFN (RWB) package measuring 1.6 mm × 1.6 mm with wettable flanks, rated MSL-2-260°C-1 year, and compatible with standard reflow profiles. Its footprint allows DP/DM traces to route uninterrupted beneath the device - eliminating vias and maintaining 90-Ω differential impedance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D1P / D1M | HS differential I/O port | Bidirectional HS signal pair; orientation-independent (upstream/downstream configurable) |
| D2P / D2M | HS differential I/O port | Second bidirectional HS signal pair; enables daisy-chaining or flexible channel routing |
| RSTN | Active-low enable/disable control | Pulls device into ultra-low-power disable state; internal 500-kΩ pull-up; requires 0.1-µF cap if not actively driven |
| EQ | HS boost level select | External pulldown resistor sets one of four EQ gain levels; sampled once at power-up |
| CD | Connection detect flag | Open-drain output asserted high when LS/FS/HS device is attached; floats if unused |
| ENA_HS | HS mode indicator | Open-drain output asserted high only during active HS link after successful chirp handshake |
| VCC | Main power input | 3.3-V supply for all circuitry; must stabilize ≥100 µs before RSTN de-assertion |
| VREG | Internal LDO output | 1.8-V regulated supply for HS core; requires 0.1-µF decoupling capacitor to GND |
| GND | Ground reference | Common return for all analog/digital functions; critical for ESD and signal integrity performance |
| TEST | No-connect terminal | No internal function; must be left floating per datasheet guidance |
| CD / ENA_HS | Status outputs | Both open-drain; support direct connection to PLDs or LEDs for real-time USB channel monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Non-invasive inline placement | DP/DM trace continuity preserved - no vias or breaks required; board layout remains functional even if device is unpopulated |
| Automatic speed mode detection | Zero-configuration operation: LS/FS bypasses compensation; HS triggers EQ-based boosting and flag assertion |
| Configurable HS signal boost | Four discrete EQ gain levels selected by external resistor; optimized per channel loss profile to pass USB-IF near-end eye mask |
| Low-power HS operation | 20 mA active current at 480 Mbps; 5.5 mA suspend current; VREG disabled in LS/FS modes to minimize quiescent draw |
| Robust status signaling | Dedicated CD and ENA_HS open-drain outputs provide real-time attachment and HS-link status without software polling |
Applications
| USB Docking Station Signal Integrity | Notebook Internal USB Trace Compensation |
|---|---|
Use Scenario: Extending USB 2.0 HS reach across multi-layer PCBs with long DP/DM traces and multiple connectors in a laptop docking station. IC Role / Device Role / Timing Role: Inline HS signal conditioner placed between host controller and upstream USB connector to restore eye opening degraded by trace loss and capacitive loading. Use Value: Enables reliable 480 Mbps operation at the physical connector, allowing full USB-IF HS compliance certification without redesigning the baseboard layout. | Use Scenario: Compensating for insertion loss in thin-profile notebook motherboards where tight spacing limits trace width and increases attenuation. IC Role / Device Role / Timing Role: Bidirectional HS repeater inserted mid-channel to boost high-frequency content lost due to skin effect and dielectric loss in compact routing. Use Value: Passes USB HS electrical compliance tests at the internal USB port despite suboptimal stack-up, avoiding costly layer count increases or impedance tuning. |
| Active USB Cable Extender | TV/STB Backplane HS Channel Recovery |
Use Scenario: Building active USB 2.0 extension cables exceeding 5 m, where passive copper alone fails to meet HS signal integrity requirements. IC Role / Device Role / Timing Role: HS signal conditioner integrated into cable assembly to regenerate DP/DM signals before transmission over extended length. Use Value: Restores jitter margin and eye height at far-end receiver, enabling stable enumeration and bulk transfer at full 480 Mbps over non-standard cable lengths. | Use Scenario: Maintaining HS signal fidelity across backplane traces connecting USB host SoC to front-panel ports in smart TVs or set-top boxes. IC Role / Device Role / Timing Role: Localized HS equalizer placed near connector to counteract loss from long, branched, or unterminated backplane routing. Use Value: Eliminates need for expensive controlled-impedance backplanes or additional buffering ICs, reducing BOM cost and layout complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB 2.0 signal conditioning applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| USB2514B-AEZG | Integrated USB 2.0 hub controller with built-in HS repeater; requires firmware, larger QFN-36 package, higher power | Used where hub functionality (4 downstream ports) is needed alongside signal conditioning | Select when system requires both port expansion and HS signal recovery in one IC |
| PI3USB30532ZLEX | Dual-lane USB 3.0/2.0 switch with HS equalization; supports USB 3.0 Gen1 (5 Gbps); higher bandwidth, different pinout | Targeted at mixed-speed designs needing backward-compatible USB 2.0 HS boost plus SuperSpeed switching | Select when future-proofing for USB 3.0 or requiring dynamic lane switching capability |
Compared with USB2514B-AEZG and PI3USB30532ZLEX, the TUSB211RWBR offers minimal-footprint, zero-firmware HS-only signal conditioning with lower power and simpler integration - ideal for dedicated signal integrity recovery where hub or USB 3.0 functionality is unnecessary.
Availability
TUSB211RWBR is available at Aetrix Electronics and suitable for USB docking stations, notebook internal trace compensation, and active cable extenders requiring stable component supply and guaranteed long-term manufacturability.
Supply support for TUSB211RWBR 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 delivering analog and embedded processing solutions, with leadership in interface, signal chain, and power management technologies.
The TUSB211RWBR belongs to TI's USB signal conditioning product line, engineered specifically to solve high-speed signal integrity degradation in USB 2.0 host-side implementations without altering LS/FS behavior or requiring protocol awareness.
FAQ
What is the primary function of the TUSB211RWBR in a USB 2.0 design?
The TUSB211RWBR is a dedicated USB 2.0 High-Speed signal conditioner that compensates for inter-symbol interference (ISI) loss in DP/DM channels. It boosts high-frequency components of 480 Mbps HS signals to restore eye opening at the connector, while leaving LS/FS signaling completely unaffected. The TUSB211RWBR achieves this without breaking trace continuity, making it ideal for retrofitting or optimizing existing USB layouts.
Does the TUSB211RWBR require firmware or configuration registers to operate?
No, the TUSB211RWBR is a fully autonomous analog signal conditioner with no firmware, registers, or digital configuration required. It automatically detects USB speed mode (LS/FS/HS) and activates compensation only during HS operation. EQ gain level is set solely by an external pulldown resistor on the EQ pin, sampled once at power-up - the TUSB211RWBR needs no host processor interaction to function.
Can the TUSB211RWBR be used in both host-side and device-side USB applications?
Yes, the TUSB211RWBR supports bidirectional HS signal flow and is explicitly qualified for both host-side and device-side USB 2.0 applications. Its D1P/D1M and D2P/D2M ports are orientation-independent, allowing flexible placement facing either the connector or transceiver. TI's datasheet provides separate test procedures and fixture configurations for host-side and device-side USB-IF compliance validation using the TUSB211RWBR.
How does the TUSB211RWBR handle power management during USB suspend or disconnect states?
The TUSB211RWBR dynamically scales power based on link state: it draws 5.5 mA in suspend mode and 4.5–5.5 mA during disconnect or LS/FS operation. The internal 1.8-V LDO (VREG) is disabled outside HS mode, minimizing quiescent current. When RSTN is pulled low, the device enters a deep-disable state drawing just 4.5–5.5 mA - ensuring minimal impact on system standby power budgets.
What is the significance of the "RWB" suffix in TUSB211RWBR, and is it compatible with TUSB211IRWBR?
The "RWB" suffix denotes the X2QFN package variant (12-pin, 1.6 mm × 1.6 mm), while the "R" indicates tape-and-reel packaging and "B" signifies TI's standard assembly process. TUSB211RWBR (0°C to +70°C) and TUSB211IRWBR (–40°C to +85°C) share identical pinout, functionality, and electrical specs - differing only in temperature rating and part marking ("C1" vs "I1"). They are drop-in replacements in commercial applications, though industrial designs require the "I" variant.
TUSB211RWBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 12-XFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Applications:
- Signal Processing
- Interface:
- USB
- Voltage - Supply:
- 3.3V
- Supplier Device Package:
- 12-X2QFN (1.6x1.6)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
TUSB211RWBR FAQ
1.How can I place an order for TUSB211RWBR through Aetrix?
Please submit a Request for Quotation (RFQ) for TUSB211RWBR 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 TUSB211RWBR reliable?
The price and inventory of TUSB211RWBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TUSB211RWBR is usually 5 days.
3.What payment methods are accepted for TUSB211RWBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TUSB211RWBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TUSB211RWBR?
TUSB211RWBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TUSB211RWBR 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 TUSB211RWBR?
For technical support, including TUSB211RWBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TUSB211RWBR requirements.
6.How does Aetrix verify that TUSB211RWBR is sourced from the original manufacturer or authorized distributors?
All TUSB211RWBR 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 TUSB211RWBR meets industry standards.
7.What is the process for return or replacement of TUSB211RWBR?
All TUSB211RWBR units undergo pre-shipment inspection (PSI). If there is an issue with TUSB211RWBR, 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 TUSB211RWBR part is unused and in its original packaging.
Return procedure for TUSB211RWBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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