Texas Instruments TUSB215IRGYT

Overview

TUSB215IRGYT from Texas Instruments is a USB 2.0 High-Speed (480 Mbps) signal conditioner with integrated BC 1.2 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 without altering low- or full-speed signal integrity, delivers programmable AC boost (4 levels via EQ pin) and DC boost (3 levels via DC_BOOST pin), and operates across –40°C to 85°C ambient temperature.

For engineers reviewing the TUSB215IRGYT datasheet, TUSB215IRGYT pinout, TUSB215IRGYT application, or TUSB215IRGYT equivalent, this device is selected for USB host-side signal integrity restoration in notebooks, docking stations, and active cable extenders where compliance with USB HS eye mask requirements is critical and native CDP functionality is absent in the upstream controller.

Technical Context

The TUSB215IRGYT implements a patent-pending, host/device-agnostic signal conditioning architecture that leaves LS/FS signals transparent while applying configurable analog equalization to HS differential pairs (D1P/D1M and D2P/D2M). Its dual-path design allows flexible placement - either pre-connector (to pass near-end eye mask) or post-USB PHY (to pass far-end mask).

Configuration is supported via pin-strapping (EQ, DC_BOOST, RSTN, SCL/CD, SDA) or optional 100 kHz I²C interface (7-bit address 0x2C), enabling runtime adjustment of AC/DC boost levels and status readback. The device asserts ENA_HS upon HS handshake detection and CD upon any DP/DM pull-up detection, providing real-time channel status flags.

Key Specifications

Pinout & Package

VQFN-14 (RGY) package with exposed thermal pad; 3.50 mm × 3.50 mm body size, 0.5 mm pitch; RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TUSB215IRGYT, TUSB216IRGYT removes CDP capability but retains identical signal conditioning performance in a pin-compatible package, while USB2514B-AEZG adds hub functionality at the cost of complexity, footprint, and configurability - making TUSB215IRGYT optimal for minimal-footprint, CDP-enabled single-lane restoration.

Availability

TUSB215IRGYT is available at Aetrix Electronics and suitable for notebook USB host ports, docking station signal integrity restoration, tablet OTG host mode, and USB-C alternate mode adapters requiring stable component supply and industrial temperature range support.

Supply support for TUSB215IRGYT 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 signal chain, power management, and connectivity technologies.

The TUSB215IRGYT belongs to TI's USB signal conditioning product line, engineered specifically to solve high-speed USB 2.0 signal integrity challenges in space-constrained, thermally demanding host systems where native PHY drive strength is insufficient.

FAQ

What is the primary function of the TUSB215IRGYT in a USB 2.0 system?

The TUSB215IRGYT functions as a USB 2.0 High-Speed (480 Mbps) signal conditioner that compensates for inter-symbol interference (ISI) in lossy transmission channels - such as long PCB traces or cables - while preserving LS/FS signal integrity. It also integrates a BC 1.2 Charging Downstream Port (CDP) controller, enabling compliant charging handshakes. This dual capability makes the TUSB215IRGYT essential for maintaining USB IF HS eye mask compliance and enabling legacy USB peripheral charging in host systems lacking native CDP support.

How does the TUSB215IRGYT handle USB Low Speed and Full Speed traffic?

The TUSB215IRGYT is explicitly designed to be agnostic to USB Low Speed (1.5 Mbps) and Full Speed (12 Mbps) signaling: it passes LS/FS differential signals unchanged without applying any gain, filtering, or delay. Its compensation circuitry activates only upon HS (480 Mbps) detection - confirmed via chirp handshake - ensuring backward compatibility and zero impact on enumeration or low-bandwidth communication. This behavior is verified in the datasheet's functional description and test conditions for I_{FS_LS} (0.77–1.5 mA typical current draw in FS/LS mode).

Can the TUSB215IRGYT be used in both host-facing and device-facing configurations?

Yes, the TUSB215IRGYT supports fully interchangeable D1P/D1M and D2P/D2M differential pairs, making it host/device agnostic. In a typical notebook design, D2P/D2M face the USB connector while D1P/D1M connect to the SoC PHY; the orientation can be reversed (D1 facing connector, D2 facing PHY) without modification. This flexibility is confirmed in the datasheet's "D1P/M and D2P/M Interchangeable and Host/Device Agnostic" feature and Figure 6 typical application schematic - enabling reuse across multiple platform topologies without layout changes.

What are the configuration options for AC and DC boost on the TUSB215IRGYT?

The TUSB215IRGYT provides four AC boost levels set by an external pulldown resistor on the EQ pin (0 Ω to 6 kΩ), and three DC boost levels (40/60/80 mV) selected via voltage strapping on the DC_BOOST pin (L/M/H). Both settings are latched at RSTN de-assertion and require a reset toggle to update. These values are specified in Table 1 (DC Boost Settings) and the EQ pin description, with typical resistor values given in Table 3 (e.g., 3.83 kΩ for AC Boost Level 2). No software or I²C write is needed for basic pin-strapped operation.

Does the TUSB215IRGYT require an external clock or crystal?

No, the TUSB215IRGYT is a fully self-contained analog signal conditioner and does not require an external clock, crystal, or timing reference. It derives all timing from the incoming USB differential data stream - detecting HS mode via the USB chirp handshake and synchronizing its equalization response accordingly. This is confirmed in the "Description" section stating it "compensates for ISI signal loss in a transmission channel" and in the absence of any clock input pin or oscillator requirement in the Pin Functions table or Recommended Operating Conditions.