Diodes Incorporated
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3.3V or 1.5V, 5.0Gbps 1-lane PCIe 2.0 ReDriver with Equalization & Emphasis

Product Description

The  PI3EQX5801 is a low power, high performance 5.0 Gbps signal ReDriver designed specifically for the PCIe 2.0 protocol. The device provides programmable equalization, De-Emphasis, and output swing controls to optimize performance over a variety of physical mediums by reducing Inter-Symbol Interference. PI3EQX5801 supports two 100Ω Differential CML data I/O’s between the Protocol ASIC to a switch fabric, over cable, or to extend the signals across other distant data pathways on the user’s platform. The integrated equalization circuitry provides flexibility with signal integrity of the signal before the ReDriver. A low level input signal detection and output squelch function is provided for each channel.

When the channels are enabled, EN# = 0, and operating, that channels’ input signal level (on xI+/-) determines whether the output is active. If the input signal level of the channel falls below the active threshold level (Vth-) then the outputs are driven to the common mode voltage. In addition to signal conditioning, when EN# = 1, the device enters a low power standby mode. The PI3EQX5801 also includes a fully programmable I2C interface. When I2C control mode is enabled, I2C_EN = 1, equalization, output swing, and de-emphasis settings can be adjusted by programming the related registers.


  • PCIe 2.0 compatible
  • Two 5.0Gbps differential signal pairs
  • Adjustable Receiver Equalization
  • 100Ω Differential CML I/O’s
  • Pin Configured Output Emphasis and Output Swing Control
  • Input signal level detect and squelch for each channel
  • Automatic Receiver Detect
  • Low Power : ~330mW (3.3V)/~150mW (1.5V)
  • Industrial Temp Support -40°C~ +85°C
  • Stand-by Mode – Power Down State
  • Two power options: 3.3V or 1.5V
  • Packaging: 20-Pin TQFN (4x4mm)

Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP) Standard
Channels 2
Data Rate (Gbps) 2.5, 5
Lanes/Ports 1
Output Swing Max (mV) 1100
Programming Interface(s) I2C, Pinstrap

Technical Documents

Application Information

Evaluation Boards and User Guides

Design tool model software

Recommended Soldering Techniques


Additional Technical Documents are available upon request:
Application information, Evaluation board, and Other technical documents

Request Documents

Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2520 2021-05-27 2021-08-27 Qualified Additional Bump Site and Assembly/Test (A/T) Sites
PCN-2328 2018-04-12 2018-10-12 Device End of Life for tray packaging only


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