Diodes Incorporated PI3EQX1001XUAEX

Overview

PI3EQX1001XUAEX from Diodes Incorporated is a 1-channel, 10 Gbps USB 3.1 Gen-2 linear ReDriver™ with pin-selectable equalization (5.1–13.1 dB @5 GHz), flat gain (–3 to +2 dB), and automatic receiver detection. It features CML I/Os, slumber/deep slumber/unplug power modes, and operates from a single 3.3 V supply. Used in notebook USB-C ports to extend signal integrity over FR4 traces or passive cables.

For engineers reviewing the PI3EQX1001XUAEX datasheet, PI3EQX1001XUAEX pinout, PI3EQX1001XUAEX application, or PI3EQX1001XUAEX equivalent, key selection criteria include programmable EQ/FG settings, 2 ns latency, 100 Ω differential CML interface compatibility, adaptive power management timing thresholds (1.3 ms slumber entry, 6 ms deep slumber trigger), and X2QFN-18 (2×2 mm) package constraints.

Technical Context

The PI3EQX1001XUAEX implements a linear equalization architecture with four-level EQ and FG control pins enabling discrete tuning of high-frequency boost and DC gain-critical for compensating channel loss in USB 3.1 SuperSpeed links. Its input termination supports 50 Ω to VDD, 67 kΩ to VbiasRx/GND; output termination offers 50 Ω to VDD, 4 kΩ to VbiasTx, or Hi-Z.

Receiver detection uses a dual-threshold LFPS detector (Vth_am = 45–175 mVpp, Vth_dsm = 100–600 mVpp) with configurable enable (RXDET_EN) and auto-recovery logic. Power state transitions are fully autonomous: idle > slumber (>1.3 ms) > deep slumber (>6 ms) > unplug mode if load absent, all without host intervention.

Key Specifications

Pinout & Package

Package: 18-pin X2QFN (2 mm × 2 mm, 0.4 mm pitch, exposed thermal pad), code XUA18. RoHS-compliant, Pb-free, tape-and-reel (X suffix).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB 3.1 linear ReDriver™ applications.

Compared with TI TUSB542 and Renesas uPD720210, the PI3EQX1001XUAEX delivers lower latency (2 ns vs >10 ns), simpler hardware-only configuration, and superior power efficiency in slumber mode-making it optimal for cost-sensitive, space-constrained USB-C endpoints where deterministic linear signal restoration is sufficient.

Availability

PI3EQX1001XUAEX is available at Aetrix Electronics and suitable for USB-C notebook expansion, external storage docking, and tablet-to-monitor adapter designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for PI3EQX1001XUAEX 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-performance signal integrity, power management, and interface solutions for consumer, computing, and industrial markets.

The PI3EQX1001XUAEX belongs to Diodes' Pericom-branded ReDriver™ product line, engineered specifically for USB 3.1 Gen-2 signal extension in compact, power-sensitive mobile platforms without protocol layer intervention.

FAQ

What is the function of the FG and EQ pins?

The FG (Flat Gain) and EQ (Equalization) pins are 4-level digital inputs that configure DC gain (–3 to +2 dB) and high-frequency boost (5.1–13.1 dB at 5 GHz), respectively. Each pin accepts GND, open, VDD, or an external resistor to GND to select one of four discrete settings-enabling hardware-tuned signal conditioning without software or serial interface.

Does PI3EQX1001XUAEX require external biasing or reference voltages?

No external biasing is required. The device integrates internal pull-up/pull-down resistors on EN, RXDET_EN, FG, and EQ pins. Input/output terminations are internally configurable (e.g., 50 Ω to VDD, 67 kΩ to VbiasRx), and VbiasRx/VbiasTx are generated internally-only VDD and GND connections are needed for basic operation.

How does the automatic receiver detection work?

Receiver detection monitors LFPS (Link Training and Status State Machine) patterns using voltage thresholds: 45–175 mVpp for active/slumber, 100–600 mVpp for deep slumber, and 200–800 mVpp for unplug mode. If no valid LFPS is detected for >6 ms in deep slumber, the device enters unplug mode and continuously scans for load presence before returning to slumber.

Can PI3EQX1001XUAEX be used with USB 3.0 (5 Gbps) signals?

Yes. The device supports both 5 Gbps (USB 3.0) and 10 Gbps (USB 3.1 Gen-2) data rates. Its equalization and flat gain settings remain effective across both speeds, and electrical specs-including 0.625 UI eye opening at 5 Gbps and <0.205 UI deterministic jitter-are explicitly validated for USB 3.0 compliance.