Diodes Incorporated PI3EQX32908EZRIEX

Overview

PI3EQX32908EZRIEX from Diodes Incorporated is an 8-channel, 32 Gbps linear PCIe 5.0 ReDriver with I²C master mode for external EEPROM configuration, supporting CXL and SAS4 protocols. It features programmable receiver equalization (3-bit), output swing (2-bit), flat gain (2-bit), 3.3 V ±0.3 V supply, and operates from –40°C to +85°C in a 62-contact W-QFN3590-62 package. Used in high-speed server backplanes and CXL memory expansion modules.

For engineers reviewing the PI3EQX32908EZRIEX datasheet, PI3EQX32908EZRIEX pinout, PI3EQX32908EZRIEX application, or PI3EQX32908EZRIEX equivalent, key selection criteria include per-channel linear equalization control, transparent link training handling, I²C master capability for EEPROM boot, CML I/O compatibility, and industrial temperature operation.

Technical Context

The PI3EQX32908EZRIEX implements eight independent linear ReDriver channels, each with configurable 3-bit equalization, 2-bit output swing, and 2-bit flat gain-enabling precise signal integrity tuning across varying trace lengths and loss profiles. Its transparent architecture preserves PCIe 5.0 link training, OOB signaling, and L0s/L1 states without protocol intervention.

It supports dual I²C modes: slave for host configuration and master for autonomous external EEPROM read at power-up, enabling daisy-chained configurations of up to 16 devices. Input threshold detection includes conditional pull-up, 50 Ω, 3 kΩ, or Hi-Z options; outputs drive 100 Ω differential CML loads with conditional input load (50 Ω or 200 kΩ).

Key Specifications

Pinout & Package

Package: 62-contact W-QFN3590-62 (ZR), 3.5 mm × 9.0 mm × 0.75 mm, exposed thermal pad, RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed linear ReDriver applications.

Compared with TI TUSB1002A and MAX96752, the PI3EQX32908EZRIEX uniquely delivers 8-channel, 32 Gbps linear reconditioning with PCIe/CXL/SAS4 protocol transparency, I²C master EEPROM boot, and industrial temperature operation-making it the only fit for scalable server and CXL memory expansion designs.

Availability

PI3EQX32908EZRIEX is available at Aetrix Electronics and suitable for PCIe 5.0 server backplanes, CXL memory expansion modules, and SAS4 enterprise storage controllers requiring stable component supply and long-term lifecycle support.

Supply support for PI3EQX32908EZRIEX 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 semiconductor company specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and connectivity applications.

The PI3EQX32908EZRIEX belongs to Diodes' ReDriver™ product line, engineered specifically for high-speed, low-latency signal conditioning in next-generation data center interconnects including PCIe 5.0, CXL, and SAS4.

FAQ

Does the PI3EQX32908EZRIEX require external configuration before operation?

No. The device supports I²C master mode to autonomously read initialization settings-including equalization, swing, and gain-from an external EEPROM at power-up. This eliminates host processor involvement during boot and ensures deterministic startup behavior across power cycles.

Can the PI3EQX32908EZRIEX be used in retimer-based PCIe 5.0 designs?

No. It is a linear ReDriver-not a retimer-so it does not perform clock-data recovery, re-timing, or protocol-aware regeneration. It preserves original timing and link training, making it suitable only where latency-critical, transparent signal boosting is needed, not for jitter cleanup or long-haul retiming.

What thermal management is required for continuous 32 Gbps operation?

The W-QFN3590-62 package includes an exposed thermal pad that must be soldered to a minimum 200 mm² copper pour on the PCB's inner layer. With 3.3 V supply and all 8 channels active at 32 Gbps, typical power dissipation is 1.8 W; junction temperature remains within spec when board thermal resistance is ≤25°C/W.

Is PRSNT# pin mandatory for functional operation?

No. PRSNT# is an optional presence-detect input used primarily in hot-plug PCIe slots to trigger link initialization. In fixed-mount applications like motherboard add-in cards or CXL memory drawers, the pin may be left unconnected or tied high without affecting ReDriver functionality.