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Texas Instruments TUSB214RWBT
- Part No.:
- TUSB214RWBT
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 12-XFQFN
- Datasheet:
-
TUSB214RWBT.pdf
- Description:
- IC INTERFACE SPECIALIZED 12X2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,374
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Product details
Overview
TUSB214RWBT from Texas Instruments is a USB 2.0 High-Speed (480 Mbps) signal conditioner with integrated BC1.2 Charging Downstream Port (CDP) controller, designed to compensate for inter-symbol interference (ISI) in lossy PCB traces and cables. It supports LS/FS/HS signaling, provides programmable AC/DC boost (up to 80 mV DC, 4 AC levels), and operates across 3.0–3.6 V supply with ultra-low shutdown current (13 µA). Used in host-side USB channels of docking stations and tablets to pass USB-IF HS eye mask compliance.
For engineers reviewing the TUSB214RWBT datasheet, TUSB214RWBT pinout, TUSB214RWBT application, or TUSB214RWBT equivalent, key selection criteria include its dual-port agnostic topology (D1P/D1M ↔ D2P/D2M), I²C or pin-strapped configuration, CDP flag output (CD), HS enable status (ENA_HS), and support for up to 5 m pre-channel or 2 m post-channel cable lengths - all critical for USB signal integrity validation and charging-aware system design.
Technical Context
The TUSB214RWBT implements a patent-pending architecture that leaves LS/FS signals unaltered while applying adaptive equalization only to HS differential pairs. Its signal conditioning path includes independently configurable AC boost (via EQ pin pulldown resistor) and tri-level DC boost (via DC_BOOST pin: 40/60/80 mV), both latched at RSTN de-assertion.
It integrates a BC1.2 CDP controller that detects device attachment via DP/DM pull-up resistors and asserts CD high upon connection - enabling host/hub platforms lacking native CDP support to deliver 1.5 A charging. The device operates in four functional modes (LS, FS, HS, Shutdown), with HS mode activation triggered by USB chirp handshake detection and TEST_PACKET transmission.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.0–3.6 V - ensures compatibility with standard USB 3.3 V rail and stable operation under typical board regulation tolerances. |
| HS Data Rate | 480.24 Mbps - matches USB 2.0 High-Speed specification, enabling full-bandwidth channel restoration without protocol violation. |
| AC Boost Levels | 4 selectable settings (Level 0–3) - configured via external EQ pin pulldown resistor (160 Ω to 6 kΩ), allowing fine-grained compensation for varying trace loss. |
| DC Boost Settings | 40/60/80 mV - set by DC_BOOST pin voltage level (L/M/H), directly offsetting baseline droop in long-lossy channels to improve eye height. |
| HS Active Current | 22–30 mA @ 480 Mbps - defines power budget impact during active data transfer; optimized for low thermal load in compact layouts. |
| Shutdown Current | 13–80 µA - enables ultra-low-power state when RSTN is held low, preserving system standby efficiency without breaking USB connectivity. |
| ESD Rating | ±2000 V HBM - meets industrial-grade robustness requirements for USB port-facing components exposed to user handling. |
Pinout & Package
The TUSB214RWBT is housed in a 12-pin X2QFN (RWB) package measuring 1.60 mm × 1.60 mm with 0.4 mm pitch, optimized for minimal PCB footprint and direct DP/DM trace routing underneath the die.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D1P / D1M | USB HS differential input (host side) | Accepts HS signal from upstream transceiver; bidirectional but functionally designated as input in typical host-side placement. |
| D2P / D2M | USB HS differential output (connector side) | Drives conditioned HS signal to USB receptacle; must be shorted to D1P/D1M on PCB for signal continuity. |
| RSTN | Active-low reset and enable control | Asserting low disables signal conditioning and CDP logic; requires ≥20 µs pulse width and stable VCC prior to de-assertion. |
| EQ | AC boost configuration input | Four-level AC gain selection via external pulldown resistor; sampled once at RSTN de-assertion and latched. |
| DC_BOOST / ENA_HS | Tri-level DC boost input / HS mode indicator output | Configures DC offset (40/60/80 mV); transitions to open-drain ENA_HS output after reset, asserting high during HS link training. |
| SCL/CD | I²C clock / connection detect output | In non-I²C mode: outputs CD flag indicating USB device attachment detected via DP/DM pull-up. |
| SDA | I²C data bidirectional pin | Supports 100 kHz I²C configuration (address 0x2C); reserved for TI test in pin-strapped mode. |
| VCC | Main power supply input | 3.0–3.6 V supply; requires local 100 nF decoupling capacitor per TI layout guidelines. |
| GND | Power ground reference | Common return path for analog and digital circuitry; must be solidly connected to PCB ground plane. |
| VREG | 1.8 V LDO output | Internally generated core voltage, enabled only in HS mode; requires 0.1 µF capacitor to GND for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Host/device-agnostic topology | D1P/D1M and D2P/D2M are fully interchangeable - eliminates orientation constraints and simplifies layout reuse across host/device-side applications. |
| BC1.2 CDP controller | Provides full Charging Downstream Port functionality including D+ and D− detection, enabling 1.5 A charging on legacy hosts without native BC1.2 support. |
| Zero-interruption USB continuity | DP/DM traces pass through uninterrupted beneath the package - allows unpopulated placement without requiring PCB redesign or vias. |
| Multi-level signal tuning | Independent AC (4 levels) and DC (3 levels) boost settings permit precise optimization for specific channel loss profiles - critical for passing USB-IF near/far-end eye masks. |
| Ultra-low disconnect power | 0.7–1.5 mA disconnect current - minimizes quiescent draw when no device is attached, extending battery life in portable systems. |
Applications
| USB Docking Station | Tablet Host Interface |
|---|---|
Use Scenario: Extends USB 2.0 connectivity from laptop to peripherals via multi-port dock with >15 cm internal routing and multiple connectors. IC Role / Device Role / Timing Role: Signal conditioner placed between host PHY and rear-panel USB receptacles to restore HS eye opening degraded by FR4 trace loss and connector parasitics. Use Value: Enables reliable 480 Mbps operation over 5 m pre-channel cable + 15 cm PCB trace, meeting USB-IF far-end eye mask without redesigning layer stack. | Use Scenario: Integrates USB 2.0 host capability into thin tablet form factor with tight EMI constraints and limited space for impedance-controlled routing. IC Role / Device Role / Timing Role: HS signal restorer located adjacent to USB Type-A receptacle to compensate for short but high-loss flex-cable and connector transitions. Use Value: Passes USB-IF near-end eye mask at connector despite 2.4 pF pin capacitance and 90 Ω differential mismatch, avoiding costly re-spin. |
| Active USB Cable Extender | Desktop Motherboard USB Header |
Use Scenario: Embedded in active USB A-to-A extension cable to extend reach beyond passive 5 m limit while maintaining HS compliance. IC Role / Device Role / Timing Role: Dual-role conditioner placed mid-cable to boost signal before final connector, supporting both upstream and downstream traffic. Use Value: Delivers 480 Mbps over 10 m total length (5 m pre + 5 m post) using two cascaded TUSB214RWBT devices with coordinated AC/DC boost staging. | Use Scenario: Adds BC1.2 CDP support to legacy desktop motherboard USB headers lacking charging capability. IC Role / Device Role / Timing Role: CDP controller and signal conditioner co-located at front-panel header to manage device attachment detection and provide 1.5 A charging. Use Value: Eliminates need for discrete BC1.2 IC and separate signal repeater - reduces BOM count and layout area by 40% versus discrete solution. |
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 |
|---|---|---|---|
| TUSB216RWBT | 2-channel version with independent AC/DC boost control per channel; same package and pinout. | Required for dual-lane USB hubs or simultaneous host/device ports; not drop-in for single-channel use. | Select TUSB216RWBT only when managing two physically separate USB 2.0 links on one board. |
| USB2244-AEZG | USB 2.0 repeater with fixed 12 dB gain; no BC1.2 CDP support; QFN-32 package (5×5 mm). | Lacks charging control and programmable boost; suited for pure signal restoration where CDP is handled elsewhere. | Choose USB2244-AEZG when CDP functionality is unnecessary and larger footprint is acceptable for higher integration density. |
Compared with TUSB214RWBT, the TUSB216RWBT adds channel independence at identical footprint cost, while USB2244-AEZG trades programmability and CDP for simpler fixed-gain repeater operation in space-tolerant designs - making TUSB214RWBT optimal for cost-sensitive, single-channel, charging-aware USB host extensions.
Availability
TUSB214RWBT is available at Aetrix Electronics and suitable for docking stations, tablet host interfaces, active cable extenders, and desktop motherboard USB headers requiring stable component supply, consistent signal integrity performance, and BC1.2-compliant charging support.
Supply support for TUSB214RWBT 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The TUSB214RWBT belongs to TI's USB signal conditioning product line, engineered specifically to solve high-speed USB 2.0 channel loss in space-constrained, cost-sensitive host systems - balancing programmability, charging intelligence, and zero-layout-disruption integration.
FAQ
What is the primary function of the TUSB214RWBT in a USB 2.0 system?
The TUSB214RWBT functions as a USB 2.0 High-Speed signal conditioner that compensates for inter-symbol interference (ISI) caused by PCB trace loss and cable attenuation. It restores signal integrity at the USB receptacle to ensure compliance with USB-IF eye mask requirements, while leaving Low-Speed and Full-Speed signals unaffected. The TUSB214RWBT also integrates a BC1.2 Charging Downstream Port (CDP) controller to enable 1.5 A charging on host platforms lacking native support.
How does the TUSB214RWBT handle USB Low-Speed and Full-Speed traffic?
The TUSB214RWBT is explicitly designed to be agnostic to USB Low-Speed (1.5 Mbps) and Full-Speed (12 Mbps) signaling. Its patent-pending architecture bypasses LS/FS differential pairs without applying any gain, offset, or filtering - preserving original signal timing, voltage levels, and waveform shape. The device automatically detects LS/FS connections and disables its HS conditioning path, asserting the CD pin high to indicate device attachment while consuming only 0.6–1.5 mA.
Can the TUSB214RWBT be used in both host-side and device-side USB configurations?
Yes, the TUSB214RWBT supports both host-side and device-side placements due to its D1P/D1M and D2P/D2M port interchangeability and host/device-agnostic design. In host-side applications, D1P/D1M connect to the upstream PHY and D2P/D2M drive the USB receptacle. In device-side configurations, the orientation is reversed - D2P/D2M accept the host signal and D1P/D1M drive the device transceiver. The TUSB214RWBT's functional modes (LS/FS/HS/Shutdown) adapt automatically regardless of placement direction.
What are the configuration options for AC and DC boost on the TUSB214RWBT?
The TUSB214RWBT offers four AC boost levels selected via an external pulldown resistor on the EQ pin (160 Ω to 6 kΩ), and three DC boost levels (40/60/80 mV) set by the DC_BOOST pin voltage (L/M/H). Both settings are sampled and latched at RSTN de-assertion and cannot be changed dynamically. For I²C configuration, registers 0x01 (ACB_LVL) and 0x0E (DCB_LVL) allow runtime adjustment, but require CFG_ACTIVE bit toggling to restart the state machine - a process documented in the TUSB214RWBT datasheet.
Does the TUSB214RWBT require external components for basic operation?
Yes, the TUSB214RWBT requires several external components for reliable operation: a 0.1 µF capacitor on VREG to stabilize the internal 1.8 V LDO; a 100 nF capacitor on VCC for power supply decoupling; a 0.1 µF capacitor from RSTN to GND if microcontroller reset control is unavailable; and external pulldown resistors on EQ and DC_BOOST pins for pin-strapped configuration. Pull-up resistors (4.7 kΩ) on SDA/SCL are required only if I²C mode is used. All values are specified in the TUSB214RWBT datasheet layout guidelines.
TUSB214RWBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 12-XFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Signal Processing
- Interface:
- USB
- Voltage - Supply:
- 3V ~ 3.6V
- Supplier Device Package:
- 12-X2QFN (1.6x1.6)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
TUSB214RWBT FAQ
1.How can I place an order for TUSB214RWBT through Aetrix?
Please submit a Request for Quotation (RFQ) for TUSB214RWBT 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 TUSB214RWBT reliable?
The price and inventory of TUSB214RWBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TUSB214RWBT is usually 5 days.
3.What payment methods are accepted for TUSB214RWBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TUSB214RWBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TUSB214RWBT?
TUSB214RWBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TUSB214RWBT 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 TUSB214RWBT?
For technical support, including TUSB214RWBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TUSB214RWBT requirements.
6.How does Aetrix verify that TUSB214RWBT is sourced from the original manufacturer or authorized distributors?
All TUSB214RWBT 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 TUSB214RWBT meets industry standards.
7.What is the process for return or replacement of TUSB214RWBT?
All TUSB214RWBT units undergo pre-shipment inspection (PSI). If there is an issue with TUSB214RWBT, 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 TUSB214RWBT part is unused and in its original packaging.
Return procedure for TUSB214RWBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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