The 89EBPES4T4 Evaluation Board (also referred to as EB4T4) provides an evaluation platform for the PES4T4 switch and the PES3T3 switch. It is also a cost effective way to add a PCIe downstream port (x1) to an existing system with a limited number of PCIe downstream ports. The EB4T4 evaluation board is designed to function as an add-on card to be plugged into a x1 PCIe slot available on a motherboard hosting an appropriate root complex, microprocessor(s), and three downstream ports. The EB4T4 is a vehicle to test and evaluate the functionality of the PES4T4 chip. Customers can use this board to get a head start on software development prior to the arrival of their own hardware. The EB4T4 is also used by IDT to reproduce system-level hardware or software issues reported by customers.




  • PES4T4 PCIe 4 port switch
  • Upstream, Downstream Port
  • Numerous user selectable configurations set using onboard jumpers and DIP-switches
  • Vaux Support
  • SMBUS Master Interface connected to the Serial EEPROMs through I/O expander
  • “Attention” button for each downstream port to initiate a hot swap event on each port
  • Four pin connector for optional external power supply
  • Push button for Warm Reset
  • Several LEDs to display status, reset, power, “Attention”, etc.
  • One 10-pin JTAG connector (pitch 2.54 mm x 2.54 mm)


  • Installation programs
  • GUI based application for Windows and Linux

Product Options

Part Number Part Status Buy Sample

Documentation & Downloads

Title Other Languages Type Format File Size Date
User Guides & Manuals
PCI Express Browser Rev 5.0.2 User Manual Manual PDF 2.56 MB
89EBPES4T4 Eval Board User Manual - Fab # 18-637-001 Manual - Eval Board PDF 2.11 MB
PCI Express Browser Rev 5.0.2 Windows Installation - Digitally Signed Software Tool ZIP 104.57 MB
PCI Express Browser Rev 5.0.2 Windows Installation Software Tool ZIP 54.45 MB
PCI Express Browser Rev 4.9 Linux Installation Software Tool ZIP 48.85 MB