The Astera Labs PT4161L PCI Express Retimer has an innovative protocol-non-disruptive low-latency architecture that significantly reduces latency while being transparent to system software. This architecture participates in Link equalization with the root complex and endpoint(s) to optimize Link performance. The PT4161L can independently adapt its latency to maximize performance during normal operational Link-state (L0) while maintaining protocol interoperation.
The PT4161L supports a wide variety of end points and port configurations by subdividing to one x16 Link, two x8 Links, four x4 Links, eight x2 Links, and more. In-band (Receiver margining) and out-of-band (SMBus) methods are accessible through per-Link diagnostics information, such as Link state history and electrical margin. Each Link operates independently.
The PT4161L features a standard PCIe 100MHz HCSL input clock, and provides a 100MHz HCSL output clock to drive other Retimer devices or PCIe components in the system.
The PT4161L Smart Retimer offers a compact design, minimal supporting circuitry, and integrated AC-coupling capacitors. The pinout is based on the Intel Retimer Supplemental Specification and uses an 8.9mm x 22.8mm Flip-Chip CSP package.