Diodes Incorporated
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PI7C8140A (Obsolete)

PCI-to-PCI Bridge, 2-Port

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Product Description

The PI7C8140A is a PCI-to-PCI Bridge, designed to be fully compliant with the 32-bit, 66MHz implementation of the PCI Local Bus Specification, Revision 2.2. The PI7C8140A supports synchronous bus transactions between devices on the Primary Bus and the Secondary Buses operating up to 66MHz. Both primary and secondary buses must operate at the same frequency. The primary and secondary buses can also operate in concurrent mode, resulting in added increase in system performance.


  • 32-bit Primary and Secondary Ports run up to 66MHz
  • Compliant with the PCI Local Bus Specification, Revision 2.2
  • Compliant with PCI-to-PCI Bridge Architecture Specification, Revision 1.1.
    • All I/O and memory commands
    • Type 1 to Type 0 configuration conversion
    • Type 1 to Type 1 configuration forwarding
    • Type 1 configuration write to special cycle conversion
  • Compliant with the Advanced Configuration Power Interface (ACPI)
  • Compliant with the PCI Power Management Specification, Revision 1.1.
  • Provides internal arbitration for four secondary bus masters 
    • Programmable 2-level priority arbiter 
  • PCI Clockrun support
  • Supports posted write buffers in all directions
  • Four 128 byte FIFO’s for delay transactions
  • Two 128 byte FIFO’s for posted memory transactions
  • Enhanced address decoding
  • 32-bit I/O address range
  • 32-bit memory-mapped I/O address range 
  • 64-bit prefetchable address range
  • Extended commercial temperature range 0°C to 85°C
  • 3.3V and 5V signaling
  • 128-pin QFP package

Product Specifications

Product Parameters

Lanes N/A
PCI Bus Width 32
PCI Speed 66
Ports 2
Ambient or Junction Temperature (°C) 0 to 85

Technical Documents

Recommended Soldering Techniques


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-2594 2022-08-31 2023-02-28 Device End of Life (EOL)