Diodes Incorporated
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PI2EQX5904 (Not Recommended for new design)

NRND = Not Recommended for New Design

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Product Description

The PI2EQX5904 (or 5964) is a low power, PCIe® compliant signal redriver also suitable for other high speed serial signals such as serdes backplane and non protocol specific protocols. The device provides programmable equalization, amplification, and de-emphasis by using 8 select bits to optimize performance over a variety of physical mediums by reducing Inter-signal interference.

PI2EQX 5904 supports eight 100W Differential CML data I/O’s between the Protocol ASIC to a switch fabric, across a backplane, or extends the signal across other distant data pathways on the user platform. PI2EQX5904 compensates signal insertion loss at designated BER issued by PCIe2.0 endpoint device.

The integrated equalization circuitry provides flexibility with the signal integrity of the PCIe signal before the ReDriver, whereas the integrated de-emphasis circuitry provides flexibility with signal integrity of the signal after the ReDriver.

In addition to providing signal re-conditioning,  the PI2EQX5904 also provides power management Stand-by mode operated by a Power Down pin.

Target markets for this ReDriver are networking, embedded, industrial, server and storage applications, including non-protocol- specific and high-speed signal applications.


  • Up to 5.0Gbps PCIe® 2.0 Serial ReDriver™
  • Supporting 8 differential channels or 4 lanes of PCIe interface
  • Pin Strapped and I2C configuration control (3.3V tolerant I2C)
  • Adjustable reciever equalization
  • Adjustable transmitter amplitude and De-emphasis
  • Increased output drive for longer trace and cable applications
  • Variable input and output termination
  • 1:2 channel broadcast
  • Channel Loop-back/Mux and Demux Mode
  • Low Power: 660mW, Typical
  • Electrical Idle fully supported
  • Receiver detect and individual output control
  • Single supply voltage, 1.2V ±0.05V
  • Power down modes
  • Industrial Temp Support, -40°C ~ +85°C
  • Packaging (Pb-free & Green): 100-contact LBGA

Product Specifications

Product Parameters

Channels 8
Data Rate (Gbps) 2.5, 5
Lanes/Ports 4
Output Swing Max (mV) 1100
Programming Interface(s) I2C, Pinstrap

Technical Documents

Recommended Soldering Techniques