Texas Instruments TUSB215RGYT

Overview

TUSB215RGYT from Texas Instruments is a USB 2.0 High-Speed signal conditioner with integrated BC 1.2 Charging Downstream Port (CDP) controller, designed to compensate for inter-symbol interference (ISI) in lossy USB channels. It supports LS/FS/HS signaling, delivers up to 80 mV DC boost and four selectable AC boost levels, and operates across 4.4–5.5 V supply with <1.5 mA HS suspend current. It enables reliable USB electrical compliance at the connector in notebooks, docking stations, and active cables.

For engineers reviewing the TUSB215RGYT datasheet, TUSB215RGYT pinout, TUSB215RGYT application, or TUSB215RGYT equivalent, key selection criteria include its dual-role as both a signal integrity enhancer and CDP controller, its host/device-agnostic D1P/D1M and D2P/D2M port interchangeability, and its configurable AC/DC boost architecture optimized for pre- or post-channel cable loss compensation.

Technical Context

The TUSB215RGYT implements a patent-pending signal conditioning architecture that preserves LS and FS signal characteristics while applying programmable AC and DC gain exclusively to HS differential pairs. Its EQ pin selects one of four AC boost levels via external pulldown resistor values (0–6 kΩ), and its DC_BOOST pin provides three-level DC gain control (40/60/80 mV) through tri-state input voltage thresholds.

It operates in five functional modes-LS, FS, HS, shutdown, and I²C configuration-with automatic mode detection and RSTN-controlled enable/disable. In HS mode, it asserts ENA_HS and drives CD upon device attachment, while supporting USB On-The-Go (OTG) and Battery Charging (BC) 1.2 protocols without altering host-side PHY behavior.

Key Specifications

Pinout & Package

VQFN-14 package (3.5 mm × 3.5 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant, lead-free, moisture-sensitive level 2a.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TUSB215RGYT, TUSB216RGYT removes CDP control but retains identical signal conditioning performance and footprint, while USB2514B-AEZG adds multi-port hub logic at the cost of increased complexity, size, and power - making TUSB215RGYT optimal for single-lane, minimal-footprint, CDP-enabled conditioning.

Availability

TUSB215RGYT is available at Aetrix Electronics and suitable for notebooks, docking stations, and active cable extenders requiring stable component supply, long-term lifecycle assurance, and consistent USB-IF compliance validation support.

Supply support for TUSB215RGYT 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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of USB interface IP development and USB-IF certification expertise.

The TUSB215RGYT belongs to TI's USB signal integrity product line, engineered specifically to solve high-loss channel challenges in compact host systems where native PHY reach is insufficient - targeting space-constrained, cost-sensitive, and compliance-critical USB 2.0 implementations.

FAQ

What is the primary function of the TUSB215RGYT in a USB 2.0 system?

The TUSB215RGYT primarily functions as a USB 2.0 High-Speed signal conditioner that compensates for inter-symbol interference (ISI) and channel loss using programmable AC and DC boost. It also integrates a USB BC1.2 Charging Downstream Port (CDP) controller. The TUSB215RGYT restores signal integrity at the connector to pass USB-IF electrical compliance tests while enabling fast-charging handshakes - all within a single VQFN-14 package.

How does the TUSB215RGYT handle Low Speed and Full Speed USB traffic?

The TUSB215RGYT is explicitly designed to be transparent to Low Speed (LS) and Full Speed (FS) USB signaling: it detects LS/FS connections automatically and disables all signal conditioning, leaving signal amplitude, timing, and waveform shape unaltered. This ensures backward compatibility with legacy USB 1.1 devices and preserves enumeration reliability. The TUSB215RGYT only applies AC/DC boost to High-Speed differential pairs (D1P/D1M and D2P/D2M), as confirmed in its functional description and electrical characteristics table.

Can the TUSB215RGYT be used in both host-side and device-side configurations?

Yes, the TUSB215RGYT supports bidirectional deployment: its D1P/D1M and D2P/D2M ports are fully interchangeable and host/device-agnostic. In a host-side application, D2P/D2M face the USB receptacle and D1P/D1M connect to the host PHY; in a device-side configuration, the orientation reverses. The TUSB215RGYT automatically adapts based on detected signaling and asserts CD and ENA_HS flags accordingly - verified in the "Typical Application" section and pin function descriptions of the datasheet.

What are the valid DC boost voltage levels supported by the TUSB215RGYT?

The TUSB215RGYT supports three discrete DC boost levels selected via the DC_BOOST pin: 40 mV (when pulled low), 60 mV (when floating, default), and 80 mV (when pulled high). These values are specified in the Electrical Characteristics table under "DC_BOOST" parameters and validated across 4.4–5.5 V VCC. The TUSB215RGYT uses internal threshold detection (VIL ≤ 0.4 V, VIM ≈ 1.6 V, VIH ≥ 2.4 V) to decode the pin state at reset - no dynamic adjustment is possible without toggling RSTN.

Does the TUSB215RGYT require external components for basic operation?

Yes, the TUSB215RGYT requires three mandatory external components: a 0.1 µF capacitor on VREG to GND for internal LDO stability, a 0.1 µF capacitor on RSTN to GND if not actively driven by a microcontroller, and external pulldown resistors on EQ and DC_BOOST pins to configure AC/DC boost levels. The datasheet specifies EQ resistor ranges (0–6 kΩ) and DC_BOOST resistor pairs (22–47 kΩ) - omission of any of these compromises signal integrity, power stability, or configuration accuracy. The TUSB215RGYT will not operate reliably without them.