Diodes Incorporated
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3-Port, 4-Lane, Slimline PCIe 2.0 Packet Switch

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Product Description

The PI7C9X2G304SL is a PCI Express® 2.0 3-port/4-lane PCI Express SlimLine™Packet Switch specifically designed to meet the latest low-power, lead (Pb)-free and green system requirements. The PI7C9X2G304SL is a high-performance, cost-effective solution that can be implemented in systems such as Embedded system, Wii-Fi router/ gateway, Printer, Storage, combo card, HBA, set-top box, motherboard, laptop, docking station, and other power-sensitive high performance platforms. The name of the family, SlimLine™, refers to Diodes Incorporated proprietary power-saving PowerSave™ technology.

The PI7C9X2G304SL provides one x1 or x2 upstream port and two x1 downstream ports. The PI7C9X2G304SL provides users the flexibility to expand or fan-out from a wide range of I/O Bridges such as PCH, ICH, IOH, embedded MCU, FPGA, and other Application Specific ICs. 

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


  • PCISIG PCI Express 2.1 certificated
  • Integrated 100MHz Clock buffer for each downstream port
  • Reliability, Availability and Serviceability
    • Supports Data Poisoning and End-to-End CRC
    • Advanced Error Reporting and Logging
    • IEEE 1149.6 JTAG interface support
  • Link Power Management
    • Supports L0, L0s, L1, L2, L2/L3Ready and L3 link power state
    • Active state power management for L0s and L1 state
  • Device State Power Management
    • Supports D0, D3Hot and D3Cold
    • 3.3V Aux Power support in D3Cold power state
  • Supports up to 512-byte maximum payload size
  • Power Dissipation: 0.65 W typical in L0 normal mode and 0.2W typical in L1 mode
  • Industrial Temperature Range: -40° to 85°C
  • MTBF: 73,208,080 hours
  • Package: 128-pin LQFP 14mm x 14mm
    • Pb free and 100% Green

Enhanced Features

  • Programmable Driver Current and De-Emphasis Level at each individual port
  • 150ns typical latency for packet running through switch without blocking
  • Supports “Cut-through”(Default) as well as “Store and Forward” mode for switching packets
  • Advanced Power Savings
    • Empty downstream ports are set to idle
    • Clock to corresponding circuit is turned off when any port enters L1 or ASPM L1
    • Supports Access Control Service (ACS) for peer-to- peer traffic
    • Supports Address Translation (AT) packet for SR-IOV application
    • Supports Latency T olerance Reporting (L TR) to improve Platform Power Management
    • Supports Optimized Buffer Flush Fill (OBFF) to improve Platform Power Management


  • Wireless AP/ Router
  • Wire/ Wireless Tele/ data communication Embedded system
  • Set-top box and consumer devices Industrial control
  • NAS/ Storage
  • Printer/ MFP
  • Peripheral
  • PCIe Surveillance and Combo cards Notebook internal PCIe fan-out
  • PC Motherboard PCIe slot expansion

Product Specifications

Product Parameters

Ports 3
Lanes 4
Power 0.7 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-2465 2020-07-02 2020-10-02 Additional Qualified Plating Source - Automotive
PCN-2366 2018-09-19 2018-12-19 Qualification of Additional Bill of Materials (BOM), Fab Source, A/T Site and Top Marking Change on Select Product


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