12-lane, 3-port PCIe I/O Expansion Switch

Provides high-performance I/O expansion and switching functions between a PCIe upstream port and two downstream ports or peer-to-peer switching between downstream ports.


  • 12 PCIe Gen1 Lanes, 3 Switch Ports
  • Switch architecture optimized for I/O Expansion
  • Supports root-to-peripheral (upstream-to-downstream) and peer-to-peer (downstream-to-downstream) data transfers
  • Internal buffering and flow control credits optimized for maximum bandwidth and large payloads
  • Low latency, Low power

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
89HPES12N3YCBC Obsolete BC324 CABGA 324 C No Tray Availability
89HPES12N3YCBCG Obsolete BCG324 CABGA 324 C Yes Tray Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
89PES12N3 Data Sheet Datasheet PDF 525 KB Apr 8, 2010
89PES12N3 Device Errata (Revision YC) Errata PDF 129 KB Sep 13, 2007
89PES12N3 Device Errata (Revision YB) Errata PDF 49 KB Aug 3, 2006
User Guides & Manuals
PCI Express Browser Rev 5.0.2 User Manual Manual PDF 2.49 MB Dec 2, 2010
Gen1 PCIe Hardware Design Guide Guide PDF 1.92 MB Jul 26, 2009
89EBPES12N3 Eval Board (89PES8NT2 device) Cadence Schematics - Fab # 18-597-001 Manual - Eval Board ZIP 1.10 MB Nov 30, 2006
89EBPES12N3 Eval Board User Manual - Fab # 18-597-001 Manual - Eval Board PDF 1.65 MB Nov 29, 2006
89PES12N3 Device User Manual Manual PDF 1.57 MB Jun 6, 2006
Application Notes & White Papers
AN-701, Hot-Swap in PCIe Based Systems Application Note PDF 283 KB Sep 15, 2008
AN-538 Hot-Plug Implementation in IDT PCI Express Switches Application Note PDF 91 KB Nov 15, 2007
AN-533, PES12N3/PES12NT3 PCIe Switch Performance with External Cabling Application Note PDF 1 KB Aug 12, 2007
AN-535 Power Measurement Techniques for IDT PCIe I/O Connectivity Switches Application Note PDF 225 KB Apr 1, 2007
AN-509, Hot-Plug Implementation in the PES12N3 PCIe Switch Application Note PDF 76 KB Oct 12, 2006
PDN# : CQ-17-02R1 Quarterly Market Declined PDN (revision1) Product Discontinuation Notice PDF 647 KB Jul 3, 2017
PDN# : CQ-17-02 Quarterly Market Declined PDN Product Discontinuation Notice PDF 898 KB Jun 1, 2017
PCN I0801-01 Die stepping Change Product Change Notice PDF 15 KB Jan 9, 2008
PCN# : A0703-01 SPIL ALTERNATE ASSEMBLY FACILITY FOR CABGA-324 Product Change Notice PDF 85 KB Apr 26, 2007
PCN#I-0607-01 Product Change Notice PDF 35 KB Nov 7, 2006
PES12N3 OrCAD symbol Misc ZIP 6 KB Oct 24, 2007
Feature and Performance Differences Between 89PES12N3 and 89PES12N3A Misc PDF 29 KB Dec 14, 2006

Software & Tools

Title Other Languages Type Format File Size Date
PCI Express Browser Rev 5.0.2 Windows Installation - Digitally Signed Software Tool ZIP 104.57 MB Jun 16, 2011
PCI Express Browser Rev 5.0.2 Windows Installation Software Tool ZIP 54.45 MB Dec 2, 2010
PCI Express Browser Rev 4.9 Linux Installation Software Tool ZIP 48.85 MB Jan 18, 2009
89PES12N3 BSDL (Revision YC) Model - BSDL BSDL 11 KB Nov 30, 2006

Evaluation Boards

Part Number Title Sort ascending
89KTPES12N3 System Development Kit for the PES12N3 PCI Express I/O Expansion Switch