Diodes Incorporated
Back to Signal Integrity - ReDrivers™/Repeaters/Signal Conditioners


3.3V, 2.5/5/8Gbps 4 channel LINEAR PCIe ReDriver with Pin Strap and I2C control, flowthough pinout

The PI3EQX8904 is a PCIe, 4 differential channels  ReDriver. The device provides programmable linear equalization, output swing and gain, by either pin strapping option or I²C Control, to optimize performance over a variety of physical mediums by reducing Inter-symbol interference.
PI3EQX8904 supports four 100-Ohm Differential CML data I/O’s and extends the signals across other distant data pathways on the user’s platform.
The programmable settings can be applied easily via pins, software (I²C) or loaded via an external EEPROM. When operating in the EEPROM mode, the configuration information is automatically loaded on power up, which eliminates the need for an external microprocessor or software driver.


  • 2.5/5.0/8.0Gbps serial link with linear equalizer
  • Support PCIe Gen 1/2/3 protocol
  • Supporting 4 differential channels
  • Independent channel configuration of receiver equalization, output swing and flat gain
  • Per Channel Activity Detector with selectable input termination between 50Ω to VCC and 200KΩ to VCC
  • Per Channel Output Termination Detector on power up with selectable output termination between 50Ω to VCC and High impedance
  • Very linear transfer function
  • Fully compliant to PCISIG Link Training
  • Single-ended mode receiver detection for PCIe
  • Input Threshold detection
  • Pin strap and I²C master/slave selectable device programming
  • 4-bit selectable address bit for I²C
  • Supply Voltage: 3.3V±0.3V
  • Industrial Temperature Range: -40°C to 85°C
  • Packaging (Pb-free & Green):
  • 42-contact TQFN (9mm x3.5mm) - flow through pinout


Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP) Standard
Channels 4
Data Rate (Gbps) 2.5, 5, 8
Lanes/Ports 2
Output Swing Max (mV) 1200
Programming Interface(s) I2C, Pinstrap

Related Content




Technical Documents

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-2328 2018-04-12 2018-10-12 Device End of Life for tray packaging only


Related Application FAQs

Related Protocol FAQs

Related Collection FAQs