PCI Express 2.0 packet switches channel low power solutions

Diodes Incorporated has extended its line of PCI Express (PCIe) Gen 2.0 solutions with four 3- and 4-port, 4-lane packet switches, designed to meet the needs of 5G, IoT and AI networks. They are suited to applications such as 5G/LTE, wi-fi routers, STB, security systems, IPC, NAS and other power-sensitive, high-performance networks.

The PI7C9X2G304SV, PI7C9X2G304EV, PI7C9X2G404SV, and PI7C9X2G404EV feature integrated clock buffers. They provide low-power solutions to increase the fan-out of a PCIe port on application processors, SoCs, FPGAs and chipsets targeting the embedded, networking, storage, PC, and consumer sectors.

The PI7C9X2G304SV and PI7C9X2G304EV offer 3-ports/4-lanes, while the PI7C9X2G404SV and PI7C9X2G404EV provide 4-ports/4-lanes. The devices also offer extended virtual channel capability, providing two virtual channels and support for eight traffic class channels.

All the devices comply with: PCIe base specification (revision 2.1), PCIe CEM specification (revision 2.0), PCI-to-PCI bridge architecture specification (revision 2.1), system management bus specification, and the advanced configuration power interface specification.

The low power design keeps power dissipation down to 300mW and 35mW, during L1.1 D3 hot state. Peer-to-peer switching between two downstream ports is also supported, with a typical latency of 150ns for packets routed through the switches, without blocking.

Unused downstream ports are automatically put into idle mode to further minimise power consumption.

The maximum payload is 512-byte and each port can be individually configured to deliver the optimal driver current and de-emphasis level.

The parts also implement downstream port containment in the event of a sudden loss of power or other failure, which helps enable high availability in end systems.

The devices feature an operating temperature range of -40 degrees C to +85 degrees C.

The PI7C9X2G304SV and PI7C9X2G404SV are available in the 128-pin LQFP package (14mm x 14mm) and the PI7C9X2G304EV and PI7C9X2G404EV are available in the 136-pin aQFN package (10mm x 10mm).

They are priced at $5.40, $7.60, $5.40 and $7.60 each in 1,000 piece quantities, respectively.


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