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Astera PT4161LRS Aries Smart Retimers For PCI-Express 4.0 and 5.0

With the rapid development of data centre, artificial intelligence and cloud computing technologies, the demand for high-speed data transmission is growing exponentially. PCI Express (PCIe), as one of the most critical interconnect technologies in modern computing systems, directly determines the performance of the entire system's data processing capability. Shenzhen Mingjiada Electronics Co., Ltd, as a global leading authorised distributor of electronic components, is now fully supplying the PT4161LRS Aries Intelligent Retimer, a high-performance signal integrity solution designed specifically for PCIe 4.0 and 5.0 architectures.

Product Description Of PT4161LRS

The PT4161LRS is an Aries family of intelligent retimers designed to address the signal integrity challenges in PCIe 4.0 (16GT/s) and PCIe 5.0 (32GT/s) architectures. As the industry's first pin-compatible PCIe 4.0/5.0 retimer upgrade solution, the PT4161LRS has been successfully deployed in multiple cloud service providers and server OEMs, and has completed comprehensive interoperability testing with top CPU, GPU and end-device vendors.

The PT4161LRS uses an innovative protocol non-disruptive low-latency architecture that significantly reduces signalling latency while being completely transparent to system software. Its core value lies in its ability to extend the coverage of PCIe signals by more than 28dB at 16GT/s, effectively solving the problem of attenuation of high-speed signals in long-distance transmission.PT4161LRS meets all PCIe 4.0 rate and re-timer functionality requirements, supporting more flexible system topology while reducing the cost of the overall solution.

Features Of PT4161LRS

The PT4161LRS Aries Intelligent Retimer features a number of breakthrough innovations in its technical implementation, making it the leading PCIe 4.0/5.0 interconnect solution. The PT4161LRS is available in an 8.9mm x 22.8mm Flip-Chip CSP package (FC-CSP-354), with an integrated AC-coupling capacitor to support extremely simple circuit design. Extremely simple, it is ideal for space-constrained application scenarios such as system boards and riser cards.

In terms of architectural design, the PT4161LRS has the following key technical features:

Flexible Link Configuration: The PT4161LRS supports a variety of endpoint and port configurations, which can be subdivided into a variety of combinations such as one x16 link, two x8 links, four x4 links, or eight x2 links, each of which can operate independently. This flexibility allows designers to optimise the system interconnect topology for specific application requirements.

Advanced Diagnostics: The PT4161LRS provides both in-band (receiver margin) and out-of-band (SMBus) diagnostics, allowing system performance monitoring and troubleshooting with per-link diagnostic information (such as link status history and electrical margins), greatly simplifying the system debugging process.

Intelligent Clock Management: The PT4161LRS is equipped with a standard PCIe 100MHz HCSL input clock and 100MHz HCSL output clock, which can drive other retimer devices or PCIe components to ensure the stability of the whole system clock synchronisation.

Low-power design: Compared to other solutions on the market, the PT4161LRS consumes half the power and uses half the number of components, which not only reduces system power consumption but also simplifies PCB layout design.

Seamless Upgrade Path: As the industry's first pin-compatible PCIe 4.0 and 5.0 retimer solution, the PT4161LRS provides system designers with a smooth transition from PCIe 4.0 to PCIe 5.0 technology path, protecting customers' long-term investments.

Application Of PT4161LRS

The PT4161LRS Aries Intelligent Retimer has demonstrated significant value in a number of high-performance computing areas due to its superior performance and flexibility. It is particularly well suited for the following key application scenarios:

Servers and HPC motherboards: In modern data centres, servers are required to handle increasing data throughput demands. the PT4161LRS effectively extends PCIe signaling distances to address interconnect challenges between multiprocessor systems, GPU accelerators, and high-speed storage devices. ‘Higher bandwidth, lower latency PCIe 5.0 and 4.0 interconnects are critical for cloud-optimised solutions that perform AI and machine learning workloads,’ noted Kiering Yang, General Manager of CloudTech (QCT).

NVMe Storage Systems and GPU Accelerators: As the performance of NVMe SSDs continues to increase, the signal integrity of the PCIe channel has become a key constraint on the performance of the storage system.The PT4161LRS can be used in NVMe JBOF (Just a Bunch Of Flash) systems and GPU/Deep Learning Accelerators, to ensure the stability of high-speed data transfers8. Samsung Electronics confirmed that the Cloud-Scale Interop Lab can help ensure seamless interoperability of its PCIe 4.0 PM1733 and PM1735 SSD solutions with the latest systems.

PCIe Riser and Add-on Cards: In space-constrained servers and storage devices, Riser cards are an important means of enabling scalability. the PT4161LRS's small form factor and low-power features make it ideal for signal relaying on Riser cards, which significantly improves the quality of signal transmission.

Server-to-Server Wired Interface: In distributed computing environments, high-speed interconnections between server nodes are critical to overall system performance. the PT4161LRS extends the physical distance of PCIe connections between servers, providing fundamental support for building high-performance computing clusters.