SN75LVPE5421RUAR

Overview

The SN75LVPE5421RUAR is a four-channel linear redriver with an integrated 2:1 multiplexer, designed for PCIe 5.0 and interfaces up to 32Gbps. It operates on a single 3.3V supply with 720mW active power consumption. The device provides up to 24dB equalization at 16GHz and features low additive random jitter of 55fs RMS. Input-to-output latency is 90ps. It supports x4, x8, and x16 bus widths and includes automatic receiver detection. The component is housed in a 3.5mm × 9mm 42-pin WQFN package.

Feature Summary

• Protocol-agnostic linear redriver compatible with PCIe, UPI, CCIX, NVLink, DisplayPort, SAS, SATA, and XFI.
• Integrated continuous-time linear equalizer (CTLE) opens closed input eyes caused by inter-symbol interference.
• Internal voltage regulator provides immunity to supply noise for high-speed data paths.
• Configurable via pin control or SMBus/I2C with automatic receiver detection for seamless link training.

Applications

• Desktop PC and motherboard
• Rack server, microserver, and tower server
• High performance computing and hardware accelerator
• Storage area network (SAN) and host bus adapter (HBA) card
• Network interface card (NIC)

Procurement Notes

Verify the specific ordering suffix RUAR corresponds to the 42-pin WQFN package configuration. Confirm that the procurement channel provides original manufacturer documentation to ensure the component meets the specified -40°C to 85°C operating temperature range and electrical characteristics.

Selection Notes

Select this component when extending PCIe 5.0 links up to 32Gbps over lossy PCB traces or cables. Ensure the system design accommodates the 3.3V single supply requirement and utilizes the internal linear regulator for noise immunity. Consider the 90ps latency and 55fs jitter specifications for timing-critical applications.

Part Context

This part belongs to Texas Instruments' family of high-speed signal conditioning devices. It serves as a companion to the SN75LVPE5412 demultiplexer for lane expansion. The device addresses signal integrity challenges in modern high-bandwidth computing environments by providing robust equalization without adding significant latency.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing system designs before considering alternative components from other manufacturers.

FAQ

How is the multiplexer path selected?

The multiplexer path between Port A and Port B is selected using the SEL pin. A logic low selects Port A, while a logic high selects Port B.

What is the maximum equalization boost provided?

The device provides up to 24dB of equalization boost at 16GHz when configured to the maximum setting (EQ Index 19).

Can the device be configured dynamically after power-up?

Yes, in SMBus/I2C mode, individual channels can be independently programmed for EQ boost and flat gain settings after power-up. In Pin Mode, most settings are sampled only at power-up.