PEX 8733

32-Lane, 18-Port PCI Express Gen 3 (8 GT/s) Switch, 27 x 27mm FCBGA

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The ExpressLane™ PEX 8733 is a 32-lane, 18-port, PCIe Gen 3 switch device developed on 40nm technology. PEX 8733 offers Multi-Host PCI Express switching capability that enables users to connect multiple hosts to their respective endpoints via scalable, high-bandwidth, non-blocking interconnection to a wide variety of applications including servers, storage, communications, and graphics platforms. In addition to high number port count, the device offers on-chip DMA engines, two NT ports and clock isolation capability. Due to their backwards compatibility, designing with PCIe Gen3 switches in mixed (Gen1, Gen2 and Gen3) systems allows designers to future-proof their designs for full Gen3 enablement when migrating to next-generation end-points. The PEX 8733 is well suited for fan-out, aggregation, and peer-to-peer traffic patterns. Included is PLX's proprietary visionPAK debug software, which allows, for example, internal receive-eye observation after equalization and access to the devices' internal debug registers thus enabling faster time to market.

Lifecycle Status


Lifecycle Status


Specification Value
Lifecycle Active
Dual/ Multi Cast MC
Lanes 32
Latency 132ns
Multi- Root/ Multi- Host 4
Non-Transparency 2
Packaging Size 27mm X 27mm
PCI-SIG® Base Spec. r3.0
Port Count 18
Power Typ. 6.4
Read Pacing Yes
SSC (Spread Spectrum Clocking ) 8
Temperature 0°C +70°C
Virtual Channels 2

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Design Guide (1) i
Product Brief (1) i
Selection Guide (1) i
White Papers (1) i


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Software Development Kit (SDK) (5) i