Diodes Incorporated PI3EQX12902AZLEX

Overview

PI3EQX12902AZLEX from Diodes Incorporated is a low-power, dual-channel linear ReDriver supporting 8 Gbps PCIe 3.0 and 6 Gbps SATA 3.0 protocols with programmable equalization, flat gain, and linear swing control. It features two independent 100 Ω differential CML I/Os, auto receiver detection, and adaptive low-power mode for notebook PCs and server motherboards.

For engineers reviewing the PI3EQX12902AZLEX datasheet, PI3EQX12902AZLEX pinout, PI3EQX12902AZLEX application, or PI3EQX12902AZLEX equivalent, key selection criteria include differential signal integrity optimization across M.2, U.2, and SATA Express interfaces, transparent link training compatibility, and industrial-temperature operation with 3.3 V ±0.3 V supply.

Technical Context

The PI3EQX12902AZLEX implements fully independent channel architecture with per-channel input-level detection driving output activation. Its linear equalization compensates for high-frequency loss in PCB traces and cables without introducing jitter amplification typical of limiting ReDrivers.

It supports transparent pass-through of PCIe 3.0 OOB signaling, link training, and idle states while maintaining protocol compliance. Control is implemented via pin-strapping (not I²C), enabling fixed configuration without firmware overhead in space-constrained docking and storage platforms.

Key Specifications

Pinout & Package

Package: 30-pin TQFN, 2.5 mm × 4.5 mm, ZL30 footprint (Pb-free & Green).

Key Features

Applications

Equivalent & Alternatives

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

Compared with PI3EQX12904AZLEX, the PI3EQX12902AZLEX offers optimal density for dual-lane M.2/U.2 expansion; versus DS100BR111SQ/NOPB, it delivers higher data rate, dual-channel independence, and native SATA 3.0 support without I²C overhead.

Availability

PI3EQX12902AZLEX is available at Aetrix Electronics and suitable for notebook PC design, server motherboard signal extension, blade server backplane interfaces, and docking station high-speed I/O hubs requiring stable component supply and industrial-temperature operation.

Supply support for PI3EQX12902AZLEX 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 integrated circuits, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.

The PI3EQX series targets high-speed serial interface signal conditioning for client and enterprise computing platforms, specifically addressing PCIe/SATA combo I/O consolidation in space- and power-constrained form factors.

FAQ

What protocols does the PI3EQX12902AZLEX natively support?

The PI3EQX12902AZLEX supports PCIe 3.0 at 8 Gbps and SATA 3.0 at 6 Gbps simultaneously across its two independent channels. It maintains full transparency to link training, OOB signaling, and idle states for both protocols without requiring reconfiguration or firmware intervention.

How is configuration performed-via pins or I²C?

Configuration is performed exclusively via pin-strapping: EQA/EQB, SWA/SWB, and FGA/FGB pins set equalization level, output swing, and flat gain per channel. No I²C interface or external controller is required, simplifying layout and eliminating boot-time dependencies.

Does the device support automatic power-down when no signal is present?

Yes. Each channel monitors its differential input (RXAP/RXAN or RXBP/RXBN) and automatically enters low-power mode when no valid signal is detected. This adaptive power management reduces total system power consumption in intermittently active storage or expansion links.

What is the significance of "linear" equalization in this ReDriver?

Linear equalization applies frequency-dependent gain without clipping or limiting, preserving signal amplitude distribution and minimizing jitter generation. Unlike limiting ReDrivers, it avoids distortion-induced bit errors in long-trace or high-loss environments while remaining fully transparent to protocol-level timing and encoding.