SN75LVPE5421RUAT

Overview

The SN75LVPE5421RUAT is a four-channel linear redriver with an integrated 2:1 multiplexer, designed for PCIe 5.0 and other interfaces up to 32Gbps. It operates on a single 3.3V supply with active power consumption of 720mW. The device provides continuous-time linear equalization (CTLE) offering up to 24dB boost at 16GHz. Key electrical parameters include a low latency of 90ps, additive random jitter of 55fs RMS, and differential return loss of -10dB from 8-16GHz. It supports x4, x8, and x16 bus widths and functions within a temperature range of -40°C to 85°C.

Feature Summary

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

Procurement Notes

Verify the specific ordering suffix RUAT against the manufacturer's official documentation to confirm package type and tape/reel specifications. Ensure compatibility with system power rails and thermal requirements before integration. Cross-reference pin configurations with the latest datasheet revision to avoid design errors during PCB layout and assembly.

Selection Notes

Select this component when extending signal reach for 32Gbps protocols without retiming. The integrated mux allows flexible lane management in x4/x8/x16 configurations. Consider SMBus/I2C configurability if dynamic equalization adjustment is required versus fixed pin-strapped settings. Evaluate thermal dissipation needs based on the 720mW active power consumption.

Part Context

This device belongs to Texas Instruments' high-speed interface lineup, specifically addressing channel loss in next-generation serial links. It complements companion demultiplexers like the SN75LVPE5412 to form complete routing solutions. The technology targets applications requiring protocol transparency and low jitter addition in dense server and storage environments.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify functional equivalence carefully if considering alternatives from other manufacturers, as pinouts and configuration methods may differ significantly.

FAQ

How is the multiplexer path selected?

The multiplexer path between Port A and Port B is selected via 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?

Yes, in addition to pin control, the device supports configuration via SMBus/I2C secondary mode, allowing individual channel programming for equalization and flat gain.