Texas Instruments TUSB214RWBR

Overview

TUSB214RWBR from Texas Instruments is a USB 2.0 High-Speed signal conditioner with integrated BC1.2 Charging Downstream Port (CDP) controller, designed to compensate for inter-symbol interference (ISI) in lossy channels. It supports LS/FS/HS signaling, provides programmable AC/DC boost (4 AC levels, 3 DC levels), operates at 3.3 V, and enables compliance with USB HS electrical specifications in notebooks, docking stations, and active cable extenders.

For engineers reviewing the TUSB214RWBR datasheet, TUSB214RWBR pinout, TUSB214RWBR application, or TUSB214RWBR equivalent, key selection considerations include its host/device-agnostic D1P/D1M and D2P/D2M port interchangeability, ultra-low shutdown current (13–80 µA), configurable I²C or pin-strapped operation, and support for up to 5 m pre-channel or 2 m post-channel cable lengths.

Technical Context

The TUSB214RWBR implements a patent-pending architecture that leaves LS and FS signals unaltered while applying adaptive AC and DC gain only to HS differential pairs. Its EQ pin latches AC boost level (0–3) via external pulldown resistor at reset, and DC_BOOST pin selects DC offset (40/60/80 mV) using tri-level strap logic - both settings require RSTN toggling to update.

It integrates a BC1.2 CDP controller for hosts/hubs lacking native charging support, and features dual-directional HS signal conditioning with D1/D2 port symmetry. The device maintains full USB channel continuity during shutdown or non-population, enabling risk-free board layout with no trace breaks required.

Key Specifications

Pinout & Package

Package: X2QFN-12 (1.60 mm × 1.60 mm, 0.4 mm pitch, wettable flank). Compact footprint enables placement directly beneath DP/DM traces without vias, preserving 90 Ω differential impedance and eliminating signal discontinuities.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB 2.0 signal conditioning applications.

Compared with TUSB214RWBR, TUSB216RWBR adds channel independence at the cost of increased complexity and non-drop-in register configuration, while USB2244-AEZG provides hub functionality but omits programmable boost and CDP control - making TUSB214RWBR uniquely suited for targeted signal integrity recovery with charging support.

Availability

TUSB214RWBR is available at Aetrix Electronics and suitable for notebooks, docking stations, and active cable extenders requiring stable component supply, long-term lifecycle management, and guaranteed traceable sourcing.

Supply support for TUSB214RWBR 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 leadership in USB interface solutions and signal integrity products.

The TUSB214RWBR belongs to TI's USB signal conditioning product line, engineered specifically to solve high-speed signal degradation in compact, thermally constrained, and cost-sensitive USB 2.0 endpoints - targeting portable computing and peripheral markets.

FAQ

What is the function of the EQ pin on the TUSB214RWBR?

The EQ pin on the TUSB214RWBR configures AC boost level (0–3) via an external pulldown resistor. Its value is sampled once at RSTN de-assertion and latched; real-time changes are ignored. Floating EQ selects maximum AC boost. This setting directly adjusts high-frequency gain to compensate for channel loss in USB 2.0 HS signals.

Does the TUSB214RWBR alter Low Speed or Full Speed USB signaling?

No, the TUSB214RWBR is explicitly designed to be transparent to LS and FS signaling. Its patent-pending architecture applies compensation only to HS differential pairs (DxP/DxM), leaving LS/FS signal characteristics unchanged - ensuring full backward compatibility with legacy USB 1.1 devices and control transfers.

How does the TUSB214RWBR support BC1.2 Charging Downstream Port functionality?

The TUSB214RWBR integrates a dedicated BC1.2 CDP controller that detects D+ pull-up resistors and executes the required voltage handshake (D+ = 0.6 V, D− = 0.6 V) to identify and enable charging. This allows host systems without native BC1.2 support - such as older hub ICs or microcontrollers - to deliver up to 1.5 A to compatible devices using the TUSB214RWBR.

Can the TUSB214RWBR be used without populating it on the PCB?

Yes. The TUSB214RWBR's pinout and layout allow DP/DM traces to run uninterrupted beneath the X2QFN-12 package. When unpopulated, the USB channel remains fully functional at LS/FS/HS speeds. This enables "design once, optimize later" - populate only if lab measurements or SI analysis indicate marginal eye opening.

What is the role of the VREG pin on the TUSB214RWBR?

The VREG pin on the TUSB214RWBR is the output of an internal 1.8-V LDO that powers the core logic exclusively during High-Speed mode. It must be decoupled with a 0.1-µF capacitor to GND. VREG is disabled in LS/FS modes and shutdown, reducing quiescent current and eliminating unnecessary power draw in idle states.