Diodes Incorporated PI3EQX7502AIZDEX

Overview

PI3EQX7502AIZDEX from Diodes Incorporated is a dual-channel, 5.0 Gbps USB 3.0 ReDriver™ with programmable equalization (3/6/9 dB), de-emphasis (0/–3.5/–6 dB), and per-channel slumber-mode power management. It features 100Ω differential CML I/Os, input signal-level detection with squelch, and automatic receiver detect via RxD_EN. Used in USB 3.0 host-to-peripheral signal extension across PCB traces, cables, or connectors.

For engineers reviewing the PI3EQX7502AIZDEX datasheet, PI3EQX7502AIZDEX pinout, PI3EQX7502AIZDEX application, or PI3EQX7502AIZDEX equivalent, this page delivers verified electrical parameters, validated pin functions, confirmed industrial temperature operation (–40°C to +85°C), and real-world USB 3.0 signal integrity use cases including trace extension and cable driving.

Technical Context

The PI3EQX7502AIZDEX implements two independent CML-based signal conditioning channels, each with configurable equalization and de-emphasis to compensate for frequency-dependent loss in 5.0 Gbps USB 3.0 SuperSpeed differential pairs. Input termination is selectable between 50Ω to internal Vbias and 60 kΩ to GND; output termination supports 50Ω or 2 kΩ to internal Vbias.

Each channel includes autonomous signal-detect logic with threshold of 50–175 mVppd, enabling squelch at common-mode voltage when input falls below Vth–. Receiver detection activates on RxD_EN high and triggers unplug/sleep transitions based on 7.3 ms idle timeout, supporting adaptive power states without host intervention.

Key Specifications

Pinout & Package

Package: 24-pin TQFN (4 mm × 4 mm, ZD code), thermally enhanced with exposed center pad (GND). RoHS-compliant, halogen- and antimony-free "Green" construction.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB 3.0 signal conditioning applications.

Compared with PI3EQX7741AI, the PI3EQX7502AIZDEX offers lower cost and smaller footprint for USB 3.0-only systems, while TI TUSB211IRWBR lacks both speed and signal conditioning capability - making it unsuitable as a direct alternative.

Availability

PI3EQX7502AIZDEX is available at Aetrix Electronics and suitable for USB 3.0 docking stations, external SSD enclosures, and multi-function printer interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for PI3EQX7502AIZDEX 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 ICs, specializing in high-performance analog, logic, and signal integrity solutions for consumer, computing, and industrial markets.

The PI3EQX7502AIZDEX belongs to Diodes' Pericom-branded ReDriver™ product line, engineered specifically for USB 3.0 signal integrity restoration in bandwidth-constrained PCB and cable interconnects.

FAQ

What is the function of the RxD_EN pin?

The RxD_EN pin enables or disables automatic receiver detection per channel. When pulled high, it activates a 7.3 ms timeout-based detection loop that transitions the channel between Slumber Mode and Unplug Mode depending on load presence. With internal 200 kΩ pull-up, it defaults to active detection unless externally pulled low.

Can EQ_A and DE_A be configured independently per channel?

Yes - EQ_A and DE_A configure equalization and de-emphasis for Channel A only; EQ_B and DE_B perform identical functions for Channel B. Each pair uses tri-level logic (0/open/1) to select 3/6/9 dB or 0/–3.5/–6 dB settings, allowing asymmetric tuning for mismatched trace lengths or cable types.

Does the PI3EQX7502AIZDEX require external configuration registers or I²C control?

No - all configuration is implemented via hardwired pin strapping: EQ_A/B, DE_A/B, EN_A#/EN_B#, and RxD_EN. There is no I²C interface, register map, or firmware requirement. This eliminates startup delay, reduces system dependencies, and ensures deterministic behavior at power-on.

What is the maximum supported trace length with this ReDriver?

Test data shows successful 5.0 Gbps operation with 36-inch FR4 traces (≈15 dB loss at 2.5 GHz) using default 6 dB equalization. Real-world performance depends on trace geometry and loss profile; the device's adjustable 3–9 dB equalization allows optimization for trace lengths ranging from 100 mm to >200 mm on standard 4-layer boards.