Texas Instruments TUSB213IRGYT

Overview

TUSB213IRGYT from Texas Instruments is a USB 2.0 High-Speed signal conditioner IC designed to restore signal integrity in lossy USB channels. It compensates for inter-symbol interference (ISI) in HS (480 Mbps) signals while transparently passing LS/FS traffic, supports up to 5 m pre-channel or 2 m post-channel cable lengths, and features programmable AC/DC boost via EQ and DC_BOOST pins for compliance with USB electrical specifications in notebooks, docking stations, and active cables.

For engineers reviewing the TUSB213IRGYT datasheet, TUSB213IRGYT pinout, TUSB213IRGYT application, or TUSB213IRGYT equivalent, key selection considerations include its dual-port HS channel architecture, tri-level DC boost (40/60/80 mV), four-level AC boost configuration, I²C or pin-strap configurability, and host/device-agnostic D1P/D1M and D2P/D2M port interchangeability.

Technical Context

The TUSB213IRGYT implements a patent-pending signal conditioning architecture that applies adaptive equalization only to USB 2.0 High-Speed differential signals (480 Mbps), leaving Low-Speed (1.5 Mbps) and Full-Speed (12 Mbps) signaling unaltered. Its dual-path design allows flexible placement-D1P/D1M facing the USB transceiver and D2P/D2M toward the connector-or reversed orientation.

Configuration is supported via either pin-strapping (EQ for AC boost, DC_BOOST for DC gain) or 100 kHz I²C interface (7-bit address 0x2C), with register-based control of ACB_LVL (0–3), DCB_LVL (011/101/111), and CFG_ACTIVE mode bit. Device state transitions (LS/FS/HS/Shutdown) are fully automatic based on line detection and RSTN assertion.

Key Specifications

Pinout & Package

VQFN-14 (RGY) package with 3.5 mm × 3.5 mm body size and exposed thermal pad for efficient heat dissipation in space-constrained USB routing paths.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TUSB213IRGYT, TUSB214IRGYT offers identical signal conditioning performance with reduced feature set (no I²C, no status flags), while USB2244-AEZG provides integrated hub logic at the expense of design flexibility and direct signal path control-making TUSB213IRGYT the optimal choice for discrete, configurable HS channel restoration.

Availability

TUSB213IRGYT is available at Aetrix Electronics and suitable for USB docking stations, industrial backplanes, and active cable extenders requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing for production programs.

Supply support for TUSB213IRGYT 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 TUSB213IRGYT belongs to TI's USB signal integrity product line, engineered specifically to solve high-loss channel challenges in USB 2.0 host, peripheral, and cable applications-enabling robust HS compliance without system-level redesign.

FAQ

What is the primary function of the TUSB213IRGYT in a USB 2.0 system?

The TUSB213IRGYT is a dedicated USB 2.0 High-Speed signal conditioner that restores signal integrity by compensating for inter-symbol interference (ISI) in lossy channels. It applies programmable AC and DC boost exclusively to 480 Mbps HS signals while leaving LS and FS traffic unaffected. This enables reliable USB-IF electrical compliance at the connector-critical for docking stations, active cables, and tablets with long or lossy PCB traces. The TUSB213IRGYT does not act as a repeater, hub, or transceiver; it is a transparent analog signal restorer.

How does the TUSB213IRGYT handle USB Low-Speed and Full-Speed traffic?

The TUSB213IRGYT 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 amplification, equalization, or DC offset-preserving original signal rise/fall times, voltage levels, and timing margins. This ensures full compatibility with legacy USB devices and avoids enumeration failures or handshake errors. Only HS (480 Mbps) traffic undergoes conditioning; the TUSB213IRGYT automatically detects mode transitions and disables boost during LS/FS operation.

Can the TUSB213IRGYT be configured after power-up, or is setup limited to reset-time only?

Configuration of AC and DC boost settings in the TUSB213IRGYT is latched at RSTN de-assertion and cannot be changed dynamically during normal operation-unless using the optional I²C interface. In pin-strapped mode, toggling RSTN is required to re-sample EQ and DC_BOOST pin states. With I²C enabled (SCL/SDA pulled high at reset), registers ACB_LVL (0x01[6:4]) and DCB_LVL (0x0E[2:0]) can be written at runtime via slave address 0x2C, provided CFG_ACTIVE (0x03[0]) is asserted and cleared to restart the state machine. Thus, the TUSB213IRGYT supports both static (reset-time) and dynamic (I²C) configuration.

What are the thermal limitations and PCB layout requirements for the TUSB213IRGYT?

The TUSB213IRGYT in VQFN-14 (RGY) package has a junction-to-board thermal resistance (R_θJB) of 24.2°C/W and requires proper thermal pad soldering to PCB ground plane. Layout must route D1P/D1M and D2P/D2M on the same layer as the IC to avoid vias, maintain 90 Ω differential impedance, and minimize stub length. A 0.1 µF capacitor is mandatory between VREG and GND. For thermal reliability in continuous HS operation, keep ambient temperature ≤85°C (TUSB213I grade) and ensure ≥200 mm² copper pour under the thermal pad. The TUSB213IRGYT's low 30 mA active current simplifies thermal design versus active redrivers.

Does the TUSB213IRGYT support USB On-The-Go (OTG) and Battery Charging (BC) protocols?

Yes, the TUSB213IRGYT is explicitly compatible with USB On-The-Go (OTG) 2.0 and Battery Charging (BC) 1.2 specifications. Its transparent LS/FS pass-through preserves OTG session request protocol (SRP) and host negotiation protocol (HNP) signaling, while HS conditioning supports BC 1.2 downstream port detection-including D+ short-to-D− and dedicated charger identification. The device does not interfere with BC handshake sequences or OTG role swaps because it operates below the protocol layer, acting solely on physical-layer signal integrity. This makes the TUSB213IRGYT suitable for dual-role mobile and docking applications where BC and OTG compliance are mandatory.