RTL8111H-CG

Ethernet controller

RTL8111H-CG – Gigabit Ethernet Controller – Realtek
Experience reliable high-speed network connectivity with the Realtek RTL8111H-CG Gigabit Ethernet Controller. This single-chip solution delivers robust performance for wired networking applications, featuring advanced power management and broad OS compatibility. PCX ensures genuine Realtek components with fast shipping and dedicated technical support.

Key Features

Gigabit Ethernet (10/100/1000 Mbps) support
PCI Express 2.0 interface compatibility
Advanced power management for energy efficiency
IEEE 802.3az Energy Efficient Ethernet (EEE) compliance
Integrated PHY with auto-negotiation capability

Technical Details
The RTL8111H-CG integrates a high-performance MAC and PHY in a compact package, supporting full-duplex operation at all standard speeds. Its PCIe 2.0 interface ensures low-latency data transfer while maintaining backward compatibility. The controller operates within industrial temperature ranges (-40°C to 85°C) and features electrostatic discharge (ESD) protection for enhanced durability in demanding environments.

Typical Applications

Desktop and laptop motherboards
Industrial PCs and embedded systems
Network-attached storage (NAS) devices
Gaming consoles and set-top boxes
Print servers and network appliances

About Realtek
Realtek Semiconductor Corp. is a global leader in network and multimedia IC design, renowned for innovative connectivity solutions since 1987. The company holds over 700 patents and maintains ISO 9001 certification, reflecting its commitment to quality management systems and manufacturing excellence.
Realtek’s Ethernet controllers power millions of devices worldwide, with rigorous testing protocols ensuring consistent performance across consumer, commercial, and industrial applications. Their continuous R&D investment keeps products at the forefront of energy efficiency and data throughput standards.

About Ethernet Controllers
Ethernet controllers serve as the critical interface between computing devices and wired networks, managing data packet transmission and hardware-level protocol handling. These ICs enable reliable communication by converting parallel data from host systems into serial network signals while implementing error correction and collision detection algorithms.
Modern controllers like the RTL8111H-CG optimize throughput for bandwidth-intensive applications while reducing CPU overhead through hardware acceleration. Their integration of MAC and PHY functions simplifies board design and lowers BOM costs, making them essential components in connected systems from consumer electronics to industrial automation.

Packaging Options
Available in industry-standard Tape & Reel packaging for automated assembly. Contact PCX for reel quantities and custom packaging solutions.

Frequently Asked Questions
Q: What operating systems support this controller?
A: The RTL8111H-CG has native drivers for Windows, Linux, and macOS, with BSD and Android support available.

Q: Does it support Wake-on-LAN functionality?
A: Yes, it implements advanced WoL features including Magic Packet and pattern match wake-up.

Q: Is this compatible with PCIe 3.0/4.0 slots?
A: The controller is backward compatible with newer PCIe generations while operating at PCIe 2.0 speeds.

Q: What voltage does the RTL8111H-CG require?