Ethernet / Ethernet Chip / W5100


*All-in-one Ethernet Controller : Hardware TCP/IP, MAC & PHY

*Fully hardwired network protocol 

*Direct & Indirect Bus and SPI for Host Interface

*Stable Data Communication

The W5100 chip is a Hardwired TCP/IP embedded Ethernet controller that enables easier Internet connection for embedded systems.


W5100 suits users in need of stable Internet connectivity best, using a single chip to implement TCP/IP Stack, 10/100 Ethernet MAC and PHY. Hardwired TCP/IP stack supports TCP, UDP, IPv4, ICMP, ARP, IGMP, and PPPoE, …, which has been proven through various applications over many years. W5100 uses a 16ytes internal buffer as its data communication memory.


By using W5100, users can implement the Ethernet application they need by using a simple socket program instead of handling a complex Ethernet Controller.


It is possible to use 4 independent hardware sockets simultaneously. BUS (Direct  & Indirect) & SPI (Serial Peripheral Interface) are provided for easy integration with the external MCU.

Key Features

*Hardwired TCP/IP protocols : TCP, UDP, ICMP, IPv4, ARP, IGMP, PPPoE

*Un-attackable hardware network engine for preventing network attacks such as flooding, spoofing, injection

*Host Interface : Direct/Indirect Bus & Serial Peripheral Interface (SPI MODE 0, 3)

*4 Independent hardware socket

*Internal 16Kbytes memory for TCP/IP packet processing

*10BaseT / 100Base TX Ethernet PHY Embedded

*Support Auto-Negotiation (Full & Half Duplex, 10 & 100 Based)

*Support Auto-MDIX

*3.3V Operation with 5V I/O signal tolerance

*LED outputs (TX, RX, full/half duplex, Collision, link, speed)

*80LQFP lead-free package (10x10mm)

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