The PI7C9X2G304EL from Diodes Incorporated is a high-performance, low-power 3-Port, 4-Lane, ExtremeLo PCIe2.0 Packet Switch, designed to meet the needs of bandwidth-intensive applications. This device provides flexible port configuration, outstanding switching performance, and is ideal for high-speed embedded systems, networking, and storage solutions.
Similar to PCI/PCI-X bridges, a PCIe switch like the PI7C9X2G304EL extends connectivity for multiple endpoints in PCIe-based systems. It forwards all PCIe transactions—posted, non-posted, and completions—between upstream and downstream ports, functioning like a set of virtual PCI bridges. Each port receives its own bus/device/function number, and packets are routed based on destination IDs or memory-mapped addresses.
To manage traffic efficiently, the switch uses a Combined Input and Output Queue (CIOQ) architecture. This design minimizes memory bandwidth requirements and supports packet ordering, head-of-line (HOL) management, and credit-based flow control without inter-port dependency.
- 2 Virtual Channels (VC0, VC1) and 8 Traffic Classes (TC0–TC7)
- Time-sensitive traffic handling via VC arbitration
- Dynamic VC buffer reallocation for better bandwidth utilization
- Access Control Service (ACS) for secure and flexible routing
- Address Translation Service (ATS) compatibility to reduce latency
- An integrated 100MHz reference clock buffer for downstream devices
This robust feature set ensures reliable, high-throughput PCIe interconnect solutions for demanding applications.
The package of PI7C9X2G304EL is a 10mm x 10mm aQFN (136 Pin) package. The following are the package information and mechanical dimension:
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