Diodes Incorporated PI3EQX2034ZLEX

Overview

PI3EQX2034ZLEX from Diodes Incorporated is a USB 3.2 Gen 2x2 (20 Gbps aggregate) ReDriver with integrated USB-C plug-in detector, supporting four independent 10 Gbps differential CML signal pairs, 3.3 V single-supply operation, and automatic CC-based orientation detection for DFP/DRP port configuration. It enables signal integrity restoration across PCB traces, cables, or connectors in high-speed USB Type-C docking stations and host systems.

For engineers reviewing the PI3EQX2034ZLEX datasheet, PI3EQX2034ZLEX pinout, PI3EQX2034ZLEX application, or PI3EQX2034ZLEX equivalent, key selection considerations include its dual-function architecture (ReDriver + USB-C detector), 100 Ω differential CML I/O impedance, programmable EQ/flat gain/swing control, VCONN power switching capability, and 24 V tolerance on CC1/CC2/VBUSDET pins.

Technical Context

The device integrates two functionally isolated blocks: a linear ReDriver with per-channel adaptive equalization and squelch, and a full-featured USB-C plug-in detector with CC-pin voltage sensing, Rp/Rd detection logic, and VCONN power management. Each ReDriver channel operates independently with 100 Ω differential CML I/Os and supports 3.0–5.0 V supply range.

It implements USB Type-C Specification 2.0 compliance features including DAM detection (Rd/Rp), debug accessory mode identification, SBU isolation via DEBUG pin, over-current/over-voltage protection on VCONN, and pin- or I²C-configurable port modes (SOURCE/DRP). The integrated high-precision resistors and current sources eliminate external components for CC biasing.

Key Specifications

Pinout & Package

Package: 52-pin ZL (TQFN), 3.5 mm × 9.0 mm, 0.5 mm pitch, exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB-C ReDriver + detector applications.

Compared with TUSB1146 and USB5807, PI3EQX2034ZLEX uniquely combines full USB-C Specification 2.0 compliance (including DAM, VCONN, SBU isolation) with 20 Gbps signal regeneration in one package - reducing total solution size by ≥40% and eliminating six external components.

Availability

PI3EQX2034ZLEX is available at Aetrix Electronics and suitable for USB-C docking stations, mobile SoC host interfaces, embedded industrial hubs, and USB-C monitors requiring stable component supply, long-term lifecycle support, and full USB-IF compliance validation.

Supply support for PI3EQX2034ZLEX 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 interface, power management, and signal integrity solutions for consumer, industrial, and computing markets.

The PI3EQX2034 belongs to Diodes' ReDriver™ product line, designed specifically to solve signal integrity and USB-C connectivity challenges in compact, power-constrained host and peripheral systems.

FAQ

What USB-C modes does PI3EQX2034ZLEX support?

PI3EQX2034ZLEX supports both SOURCE (DFP) and Dual-Role Port (DRP) modes. In SOURCE mode, it detects Rd on CC pins to identify UFP attachment and advertises current levels (500 mA, 1.5 A, or 3 A) via SRC_CUR. In DRP mode, it performs bidirectional Rp/Rd detection to determine whether the connected device is acting as source or sink, enabling automatic role negotiation without host processor intervention.

Does PI3EQX2034ZLEX require external resistors for USB-C CC detection?

No. The device integrates precision current sources and termination resistors for CC1 and CC2 pins, eliminating the need for external Rp, Rd, or pull-up/down resistors. This integration reduces BOM count, improves detection accuracy across temperature, and ensures consistent USB-IF compliance without layout-dependent resistor matching.

Can PI3EQX2034ZLEX drive VCONN for active cables?

Yes. PI3EQX2034ZLEX includes an integrated VCONN power switch capable of delivering up to 5 V at 200 mA. It provides over-current and over-voltage protection, supports automatic enable/disable based on plug detection, and routes power directly from the system 5 V rail - removing the need for external MOSFETs, drivers, or protection ICs in active cable implementations.

How is signal integrity managed across varying channel losses?

Each of the four ReDriver channels supports independent, programmable equalization (EQ), flat gain, and output swing settings via pin strapping or I²C. This allows dynamic optimization for different interconnect types - such as short PCB traces (<10 cm), mid-length flex cables (~20 cm), or longer passive cables - by compensating for frequency-dependent loss and reducing inter-symbol interference without requiring firmware tuning.