Diodes Incorporated
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12-port, 24-lane, PCIe 2.0 Packet Switch with GreenPacket Technology

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Product Description

The PI7C9X2G1224GP is a 24-lane PCI Express 2.0 Switch with 12 PCI Express ports specifically designed to meet high performance and the latest GREEN low-power, lead (Pb)-free system requirements, such as Networking/ Telecom, Embedded, Server, Storage and other platforms. The PI7C9X2G1224GP supports 4 DMA channels and Non-Transparent port apply for high Performance, dual-host and fail over applications

The PI7C9X2G1224GP provides elastic configuration as below.
Upstream port      Downstream port
x4 PCIe 2.0                 8 x1 + 3 x4 PCIe 2.0
x4 PCIe 2.0               10 x2 PCIe 2.0
x4 PCIe 2.0                5 x4 PCIe 2.0
x8 PCIe 2.0                4 x4 PCIe 2.0
x8 PCIe 2.0                2 x4 + 1 x8 PCIe 2.0
x8 PCIe 2.0                2 x8 PCIe 2.0

Industry Specifications Compliance

  • PCI Express® Base Specification, Revision 2.1
  • PCI Express CEM Specification, Revision 2.0
  • PCI-to-PCI Bridge Architecture Spec., Rev 1.2
  • Advanced Configuration Power Interface (ACPI) Specification
  • SMBus interface support
  • I²C Slave interface support


  • PCISIG PCI Express 2.1 certificated
  • Reliability, Availability and Serviceability
    • Supports Data Poisoning and End-to-End CRC
    • Advanced Error Reporting and Logging
  • Device State Power Management
    • Supports D0, D3Hot and D3Cold device power states
  • Advanced Power Savings
    • Empty downstream ports are set to idle
  • Support programmable Non-Transparent mode
  • Support Four DMA Channels
  • Support Multicast
  • Integration clock buffer for any 5 downstream ports
  • Programmable driver current and de-emphasis level at each individual port
  • Port Arbitration: Round Robin (RR), Weighted RR and Time-based Weighted RR
  • Extended Virtual Channel capability
    • Two Virtual Channels (VC) and Eight Traffic Class (TC) support
    • Independent TC/VC mapping for each port
  • Supports Isochronous Traffic
    • Isochronous traffic class mapped to VC1 only
  • Supports “Cut-through”(Default) as well as “Store and Forward” mode for switching packets
  • Supports up to 512-byte maximum payload size
  • Power Dissipation: 2.1 W typical in L0 normal mode
  • Industrial Temperature Range: -40o to 85oC
  • MTBF: 50,927,360 hours
  • Package: 324-pin HSBGA 19mm x 19mm
    • Pb free and 100% Green

Enhanced Features

  • 150ns typical latency for packet running through switch without blocking
  • Link Power Management
    • Supports L0, L0s, L1, L2, L2/L3Ready and L3 link power states
    • Active state power management for L0s and L1 states
  • Supports Device Specific PME Turn-Off Message for each downstream port
  • Support Access Control Service (ACS)
  • Support peer-to-peer traffic thru DMA
  • Support Address Translation (AT) packet for SR-IOV application
  • Support Alternative Routing ID Interpretation (ARI)
  • Support Serial Hot Plug Controller


  • Networking Switch Router
  • Wired/ Wireless Telecom/ data communication
  • Control plane
  • NAS/ Storage
  • Server
  • Embedded system
  • HBA / Combo cards
  • IPC/ Industrial control
  • Printer/ MFP/ Peripheral
  • Surveillance/ Security
  • Fail-Over system





Product Specifications

Product Parameters

Ports 12
Lanes 24
Power 2.1 w
Latency 150 ns
Ambient or Junction Temperature (°C) -40 to 85
Compliance (Only Automotive supports PPAP) Standard

Technical Documents

Recommended Soldering Techniques


Additional Technical Documents are available upon request: 
Application information, Design tool model software, Design kits, Evaluation board, and Other technical documents

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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-2408 2019-10-02 2020-01-02 Additional Qualified (AT) Assembly Test Site + BOM + Top Marking