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4-Port, 4-Lane, ExtremeLo PCIe 2.0 Packet Switch

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Product Description

The PI7C9X2G404EL is a PCI Express® 2.0 4-port/4-lane PCI Express ExtremeLo Packet Switch specifically designed to meet the latest low-power, lead (Pb)-free and green system requirements. The PI7C9X2G404EL is a high-performance, cost-effective solution that can be implemented in systems such as embedded system, Wi-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, ExtremeLo, refers to Diodes' proprietary power-saving PowerSave technology.

The PI7C9X2G404EL provides one upstream port and three x1 downstream ports. The PI7C9X2G404EL 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
  • Industrial Temperature Range: -40°C to 85°C
  • MTBF: 50,927,360 hours
  • Package: 136-pin aQFN 10mm x 10mm
    • 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 Tolerance Reporting (LTR) 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 4
Lanes 4
Power 0.65 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

Request Documents
Orderable Part Number Status Package Environmental Compliance Packing Buy from Distributor /
Contact Sales
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Qty. Carrier
PI7C9X2G404ELZXAE Active V-QFN100100-136 TPGP 168 TRAY


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Mouser Electronics Inc. 2081 12/5/2022 South America, North America, Asia, Europe, Middle East Buy Now
Request Sample
PI7C9X2G404ELZXAEX Active V-QFN100100-136 TPGP 1000 T&R Contact Sales Request Sample

Environmental Compliance Legend:
LFF: Pb-Free Finish and RoHS 5/6
TLFP: Totally Pb-Free Product and RoHS 6/6
LFGP: Pb-free Finish and Green Product, RoHS 5/6 and Halogen Free
TPGP: Totally Pb-Free and Green Product, RoHS 6/6 and Halogen Free
GREEN: Halogen-free and RoHS compliant
RoHS: RoHS compliant but NOT halogen-free