The KSZ8851SNL-TR is a single-chip, 10/100-Mbps Ethernet network media access controller (MAC) and physical layer (PHY) device manufactured by Microchip. It supports both media access controller (MAC) and physical layer (PHY) functions, providing physical layer interfacing for an Ethernet physical layer interface. The KSZ8851SNL-TR also supports a range of advanced features including secure data transmission, power saving modes, and full duplex operation. It is suitable for 802.3 applications, including embedded networking, electricity metering, security, and smart appliances.