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Texas Instruments TUSB211IRWBR
- Part No.:
- TUSB211IRWBR
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 12-XFQFN
- Datasheet:
-
TUSB211IRWBR.pdf
- Description:
- IC INTERFACE SPECIALIZED 12X2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,833
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Product details
Overview
TUSB211IRWBR 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, 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 TUSB211IRWBR datasheet, TUSB211IRWBR pinout, TUSB211IRWBR application, or TUSB211IRWBR equivalent, key selection criteria include its HS-only active compensation architecture, RSTN-controlled disable mode, EQ-selectable boost levels (0–3), ENA_HS/CD status flag outputs, and compatibility with USB OTG 2.0 and BC 1.2 protocols.
Technical Context
The TUSB211IRWBR implements a patent-pending analog equalization architecture that selectively boosts only High-Speed (480 Mbps) differential signals while transparently passing Low-Speed (1.5 Mbps) and Full-Speed (12 Mbps) traffic unchanged. Its dual-port design (D1P/D1M and D2P/D2M) enables flexible upstream/downstream orientation without polarity sensitivity.
Signal conditioning is triggered automatically upon HS handshake detection (chirp J/K pair within 18–128 µs), activating internal compensation and asserting ENA_HS. The EQ pin latches external pulldown resistor value at power-up to select one of four fixed gain levels - no real-time adjustment is supported.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3 V nominal (3.0–3.6 V range); powers internal LDO for VREG output and core logic |
| HS Data Rate | 480 Mbps; meets USB 2.0 High-Speed specification with <100 ps rise/fall time |
| Active Current (HS) | 20 mA typical; enables low-power HS channel conditioning without thermal derating |
| EQ Gain Levels | 4 discrete settings (Level 0–3) selected by external pulldown resistor (0.32 kΩ to ≥6 kΩ) |
| Operating Temp | –40°C to +85°C; qualified for industrial and extended-temperature embedded applications |
| ESD Rating | ±3000 V HBM; ensures robustness during board assembly and system integration |
| Package | X2QFN-12 (RWB), 1.6 mm × 1.6 mm; supports high-density routing with DP/DM traces routed underneath |
Pinout & Package
X2QFN-12 (RWB) package, 1.6 mm × 1.6 mm body size, wettable flank leads, RoHS-compliant NIPDAU finish, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D1M | I/O (HS differential) | Negative HS port; orientation-independent, connects to either USB connector or transceiver side |
| D1P | I/O (HS differential) | Positive HS port; orientation-independent, pairs with D1M for bidirectional HS path |
| TEST | Input | No-function pin; must be left floating per datasheet to avoid undefined behavior |
| CD | Output | Device connection detect flag; asserted high when LS/FS/HS device is attached; usable for PLD control or LED indication |
| RSTN | Input | Active-low enable/disable control; drives device into low-power disable mode when pulled low; requires 0.1 µF capacitor if not actively driven |
| EQ | Input | External pulldown resistor selects HS gain level (0–3); sampled once at power-up; floating = Level 3 (max boost) |
| ENA_HS | Output | High-Speed mode indicator; asserted high only during active HS operation after successful chirp handshake |
| GND | Power | Analog/digital ground reference; shared return for VCC, VREG, and signal paths |
| VREG | Output | 1.8-V LDO output for internal core; requires 0.1 µF decoupling capacitor to GND for stability |
| VCC | Power | 3.3-V main supply input; powers all circuitry including I/O buffers and LDO regulator |
| D2M | I/O (HS differential) | Negative HS port; second differential pair enabling daisy-chain or bidirectional configuration |
| D2P | I/O (HS differential) | Positive HS port; pairs with D2M to support cascaded signal conditioning or alternate routing topologies |
Key Features
| Feature | Design Value |
|---|---|
| Non-invasive inline placement | DP/DM trace continuity preserved - no vias or breaks required; supports "populated or not" design flexibility |
| LS/FS transparency | No signal alteration for 1.5/12 Mbps traffic; maintains full backward compatibility with legacy USB devices |
| Programmable HS gain | Four discrete EQ levels selectable via external resistor; enables optimization for specific PCB loss profiles |
| Status flag outputs | ENA_HS and CD provide real-time HS mode and device attachment indication for host-side logic control |
| USB protocol compatibility | Fully compliant with USB 2.0, OTG 2.0, and Battery Charging 1.2 specifications - no protocol translation needed |
Applications
| Notebook Docking Stations | USB Active Cable Extenders |
|---|---|
Use Scenario: Signal degradation over long or lossy PCB traces between host controller and rear-panel USB connectors. IC Role / Device Role / Timing Role: HS signal conditioner placed near connector to restore eye opening before USB-IF compliance testing. Use Value: Enables pass/fail margin on USB-IF near-end eye mask test without redesigning trace impedance or layer stackup. | Use Scenario: Maintaining signal integrity across extended-length passive USB cables exceeding standard length limits. IC Role / Device Role / Timing Role: Inline repeater/conditioner inserted between cable segments to compensate for frequency-dependent attenuation. Use Value: Extends functional cable reach beyond 5 m while preserving 480 Mbps HS link reliability and enumeration success. |
| Industrial Backplane Interfaces | Tablet USB Host Expansion |
Use Scenario: High-loss interconnects between CPU module and peripheral carrier board in modular industrial systems. IC Role / Device Role / Timing Role: HS channel conditioner integrated into backplane routing to offset insertion loss from multiple connectors and long FR4 traces. Use Value: Eliminates need for expensive low-loss laminates or active retimers while ensuring robust HS enumeration and bulk transfer performance. | Use Scenario: Adding USB host capability to compact tablet platforms where space-constrained layout causes trace length mismatch and impedance discontinuities. IC Role / Device Role / Timing Role: Miniaturized signal conditioner placed adjacent to USB Type-A receptacle to correct edge degradation pre-connector. Use Value: Achieves USB-IF HS electrical compliance in tight form factors using standard PCB materials and routing practices. |
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 |
|---|---|---|---|
| TS3USB30E | Passive 2-channel USB 2.0 switch; no signal conditioning, no EQ gain, no ENA_HS/CD flags | Used for USB port multiplexing, not signal restoration; lacks HS-specific equalization | Select TS3USB30E only when switching-not conditioning-is required; cannot replace TUSB211IRWBR for eye mask correction. |
| USB2514B | 4-port USB 2.0 hub controller with integrated PHY; includes basic signal conditioning but not programmable EQ | Provides full hub functionality (addressing, transaction translation); occupies larger footprint and higher BOM cost | Choose USB2514B when adding multi-port expansion is needed; TUSB211IRWBR remains optimal for dedicated, low-cost, single-channel HS boost. |
Compared with TS3USB30E and USB2514B, the TUSB211IRWBR uniquely delivers targeted, programmable HS equalization in a minimal 1.6 mm × 1.6 mm package - making it the only solution optimized specifically for restoring marginal USB 2.0 HS signal integrity without adding switching logic or hub overhead.
Availability
TUSB211IRWBR is available at Aetrix Electronics and suitable for notebook docking stations, USB active cable extenders, and industrial backplane interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TUSB211IRWBR 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 for industrial, automotive, and personal electronics markets.
The TUSB211 product line was developed to address USB 2.0 High-Speed signal integrity challenges in space-constrained, high-loss PCB environments - targeting applications where traditional retimers are over-engineered and passive switches lack compensation capability.
FAQ
What is the primary function of the TUSB211IRWBR in a USB 2.0 system?
The TUSB211IRWBR functions exclusively as a High-Speed (480 Mbps) signal conditioner that compensates for inter-symbol interference (ISI) loss in DP/DM transmission channels. It preserves Low-Speed and Full-Speed signal characteristics unchanged while applying programmable analog equalization to restore eye diagram integrity - enabling USB-IF HS electrical compliance without altering existing USB protocol behavior or requiring firmware changes. This makes the TUSB211IRWBR ideal for retrofitting marginal designs.
How does the EQ pin on the TUSB211IRWBR affect signal performance?
The EQ pin on the TUSB211IRWBR selects one of four fixed HS gain levels (0–3) via an external pulldown resistor, with values ranging from 0.32 kΩ (Level 0) to ≥6 kΩ (Level 3). The setting is latched at power-up and cannot be changed dynamically; toggling RSTN is required to re-sample EQ. Level 3 (floating EQ) provides maximum boost for highest-loss channels, while Level 0 offers minimal enhancement - allowing precise tuning to match measured PCB insertion loss without trial-and-error iteration.
Can the TUSB211IRWBR be used in both host-side and device-side USB implementations?
Yes, the TUSB211IRWBR supports both host-side and device-side USB 2.0 implementations. Its orientation-independent D1P/D1M and D2P/D2M ports allow flexible placement - D1 facing the connector and D2 facing the PHY, or vice versa. The device automatically detects LS/FS/HS mode and activates compensation only during HS operation, making it equally valid for host controllers (e.g., in docking stations) and peripheral devices (e.g., active cables or tablets), as confirmed in TI's application notes and test procedures.
What is the role of the ENA_HS and CD pins on the TUSB211IRWBR?
The ENA_HS pin asserts high only during active USB 2.0 High-Speed operation - triggered by successful chirp handshake detection - providing a hardware flag for host-side logic to enable downstream HS-capable peripherals. The CD (Connection Detect) pin asserts high whenever any USB device (LS/FS/HS) is attached, regardless of speed. Both outputs are open-drain compatible and can drive PLDs, LEDs, or microcontroller GPIOs; they may be left floating if unused, per TI's recommended design practice for the TUSB211IRWBR.
Does the TUSB211IRWBR require external components for basic operation?
Yes, the TUSB211IRWBR requires two mandatory external components: a 0.1-µF ceramic capacitor from VREG to GND for internal LDO stability, and a pull-up or pull-down resistor on RSTN depending on system reset architecture (500 kΩ internal pull-up exists, but a 0.1-µF capacitor to GND is recommended if RSTN is not actively driven). An external pulldown resistor on EQ is optional - only needed if Levels 0–2 are desired; Level 3 uses a floating EQ pin. No other passive components are required for functional operation of the TUSB211IRWBR.
TUSB211IRWBR 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
TUSB211IRWBR FAQ
1.How can I place an order for TUSB211IRWBR through Aetrix?
Please submit a Request for Quotation (RFQ) for TUSB211IRWBR 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 TUSB211IRWBR reliable?
The price and inventory of TUSB211IRWBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TUSB211IRWBR is usually 5 days.
3.What payment methods are accepted for TUSB211IRWBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TUSB211IRWBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TUSB211IRWBR?
TUSB211IRWBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TUSB211IRWBR 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 TUSB211IRWBR?
For technical support, including TUSB211IRWBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TUSB211IRWBR requirements.
6.How does Aetrix verify that TUSB211IRWBR is sourced from the original manufacturer or authorized distributors?
All TUSB211IRWBR 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 TUSB211IRWBR meets industry standards.
7.What is the process for return or replacement of TUSB211IRWBR?
All TUSB211IRWBR units undergo pre-shipment inspection (PSI). If there is an issue with TUSB211IRWBR, 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 TUSB211IRWBR part is unused and in its original packaging.
Return procedure for TUSB211IRWBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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