Company Profile
PLX Technology Inc.
Profile date: 2024-12-27
PLX Technology Inc.
PLX Technology, Inc. was a prominent American manufacturer of high-speed interconnect integrated circuits, specializing in solutions for the enterprise, communications, and embedded systems markets. The company, headquartered in Sunnyvale, California, USA, became a global leader in providing silicon and software for connecting various components within complex electronic systems. PLX was founded in 1986 and operated as an independent, publicly traded company until its acquisition by Avago Technologies (now Broadcom Inc.) in 2014.
Core Business and Industry Focus
The primary business of PLX Technology was the design, development, and sale of semiconductor-based standard input/output (I/O) connectivity solutions. The company's market leadership was cemented by its dominant position in the PCI Express (PCIe) switch and bridge silicon industry, where it commanded a significant market share, often cited as over 70% in PCIe switches.
PLX???s products were integral to next-generation data center architectures, cloud computing infrastructure, and high-performance computing (HPC) environments. The silicon devices acted as the critical, high-bandwidth interconnects that allowed central processing units (CPUs), graphics processing units (GPUs), memory, and storage devices to communicate with low latency and high throughput. Key end markets for PLX's technology included:
- Server and Enterprise Storage: Enabling flexible, high-density, and scalable I/O solutions for enterprise-grade servers, storage arrays, and blade servers.
- Communications: Providing interconnects for networking equipment, base stations, and communication line cards.
- Embedded Control: Supplying components for industrial control systems, medical imaging, and surveillance equipment.
- Consumer/SOHO: Offering connectivity solutions for consumer electronics, network attached storage (NAS) devices, and small office/home office (SOHO) storage markets, a segment bolstered by the acquisition of Oxford Semiconductor.
Products and Services
PLX Technology???s portfolio centered on its ExpressLane family of PCI Express devices, complemented by a range of other I/O controllers and bridges.
1. ExpressLane PCI Express Switches and Bridges
The ExpressLane family was the cornerstone of the company???s product line, offering a broad spectrum of switches and bridges across multiple generations of the PCIe standard. These devices were vital for expanding the number of peripherals and communication paths available to a host processor.
PCIe Switches: The switches were non-blocking fabrics that allowed for high-speed, peer-to-peer data transfers between any two endpoints without impacting other traffic. PLX continually pushed the envelope on port and lane count, offering some of the industry's highest-density solutions.
- Gen 2 (PEX 86xx Series): Devices like the PEX 8696 provided massive connectivity with up to 96 lanes and 24 ports, catering to the most demanding server and storage backplane applications. They supported advanced features for I/O virtualization, such as Access Control Service (ACS) and Alternative Routing-ID Interpretation (ARI), which are crucial for virtual computing environments.
- Gen 3 (PEX 87xx Series): PLX was an early mover in the PCIe Gen 3 (8 GT/s) market. The ExpressLane PEX 8747 was a notable high-performance switch with 48 lanes and 5 ports, optimized for applications like high-resolution graphics and multi-GPU systems, supporting peer-to-peer and multicast traffic.
PCIe Bridges: These chips provided protocol translation to link different I/O standards. For example, the ExpressLane PEX 8111 was a PCI-to-PCIe bridge, connecting legacy 32-bit PCI buses to the high-speed PCIe standard. This allowed designers to leverage existing hardware with newer systems.
2. Advanced Features and Software
PLX differentiated its products with integrated, unique hardware and software features:
- Non-Transparent Bridging (NT): A feature that allowed for host failover, redundancy, and processor isolation in multi-host systems, making the switches critical for mission-critical enterprise applications.
- Integrated DMA Engines: The on-chip Direct Memory Access (DMA) engines in some switches allowed for high-speed data movement between memory and endpoints without requiring intervention from the host CPU, thereby increasing system performance.
- Software Development Kits (SDK) and Debug Tools: PLX offered comprehensive RDKs (Reference Design Kits) and SDKs (Software Development Kits) to aid customers in product development. Proprietary debug tools like visionPAK and performance-enhancing features like performancePAK (including Read Pacing and Dynamic Buffer Pool) were part of the solution package, enabling faster time-to-market for customers.
3. ExpressFabric Initiative
PLX championed the ExpressFabric concept, an innovative approach to data center architecture that utilized PCIe technology as a converged fabric. The goal was to connect servers, storage, and networking within a data center rack via a single PCIe backbone. This initiative was designed to overcome the limitations of traditional networking protocols by reducing costs, lowering power consumption, and decreasing data latency, showcasing the company's vision for using PCIe beyond a local chip-to-chip interconnect.
4. Legacy and Other I/O Products
Beyond PCIe, PLX offered a diverse range of I/O solutions derived partially from strategic acquisitions:
- USB Controllers: Including the NetChip USB 2.0 controllers.
- Traditional PCI and PCI-X Devices: Such as the PLX FastLane PCI 6000 Series and I/O Accelerators (PCI 9000 series), which allowed for the transition from older bus technologies.
- HyperTransport Bridges: The PowerDrive HT7520 HyperTransport Bridge for high-speed interprocessor communication in certain system architectures.
In summary, PLX Technology's core function was to provide the essential, high-performance silicon interconnects that facilitated the internal data flow of modern computing systems, establishing a technological foundation that was critical to the advancement of high-speed servers, storage, and networking in the cloud era.