Product Overview

The PR51RX3 is a high-performance PCIe multi-function bridge chip that can expand a single PCIe Gen4 x1 upstream interface into multiple downstream interfaces. This product configuration includes: 2 USB 3.2 Gen2 Type-C ports (10 Gbps), 3 USB 3.2 Gen1 Type-A ports (5 Gbps), 1 2.5GBASE-T Ethernet port, and 4 SATA Gen3 ports (6 Gbps). This chip is suitable for desktop computers, workstations, servers, and embedded platforms, providing high-speed data, networking, and storage expansion capabilities for the system.

Features

• PCI Express

  - Compatible with PCIe Gen4 x1; backward compatible with Gen3/Gen2/Gen1

  - Maximum bandwidth: 16 Gbps (unidirectional)

  - Supports ASPM L0s/L1 and L1 sub-states

  - Supports MSI/MSI-X interrupts

  - Supports AER, LTR, and VC

 • 2 USB 3.2 Gen2 Type-C ports

  - Data rate: 10 Gbps (SuperSpeed+)

  - Supports reversible plug detection and internal MUX switching

  - Supports CC logic, providing 5V/3A power

  - Compatible with xHCI 1.2 specification

• 3 USB 3.2 Gen1 Type-A ports

  - Data rate: 5 Gbps (SuperSpeed)

  - Backward compatible with USB 2.0/1.1

  - Supports Battery Charging specification BC 1.2

  - Compatible with xHCI 1.1 specification

• USB Common Features

  - Supports control, bulk, synchronous, and interrupt transfers

  - Supports up to 64 devices per port

  - Supports UAS, BOT, UAC, UVC, HID

  - Supports remote wake-up, connect/disconnect wake-up, and overcurrent wake-up

  - Supports per-port independent power control and overcurrent protection

• 1 x 2.5GBASE-T Ethernet port

  - Supports 10/100/1000M/2.5G auto-negotiation

  - Compatible with IEEE 802.3, 802.3u, 802.3ab, 802.3bz

  - Supports full-duplex flow control (802.3x)

  - Supports Energy Efficient Ethernet (802.3az)

  - Integrated PHY transceiver with MDI/MDI-X auto-crossover and polarity correction

  - Supports protocol offloading: ARP (IPv4), NS (IPv6)

  - Supports Receive-Side Scaling (RSS)

  - Supports jumbo frames up to 16 KB

  - Supports Wake-on-LAN (Magic Packet, Wake-Up Frame)

  - Customizable LED indicators (link/activity/speed)

• 4 SATA Gen3 ports

  - Speed: 6Gbps, backward compatible with Gen2/Gen1

  - Compliant with AHCI 1.3.1 specification

  - Supports NCQ (Native Command Queuing)

  - Supports power management: Partial, Slumber

  - Supports auto-negotiation

System Support

• Windows

• Linux

Complete Package Contents

1 x Lekuo SouthBridge Mini

1 x User Manual

1 x Short Metal Bracket

1 x 19-pin USB 3.0 to Dual USB-A Female Connector Cable (Optional)