W5100 WIZnet Chip

  • 604-05100: W5100 WIZnet Chip
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Product ID 604-05100


The W5100 is a full-featured, single-chip, Internet-enabled 10/100 Ethernet controller designed for embedded applications where ease of integration, stability, performance, area and system cost control are required.  The W5100 has been designed to facilitate easy implemntation of internet connectivity without OS.  The W5100 is IEE 802.3 10BASE-T and 802.3u 100BASE-TX compliant.The W5100 includes fully hardwired, market-proven TCP/IP stack and integrated Ethernet MAC and PHY.  Hardwired TCP/IP stack supports TCP, UDP, IPv4, ICMP, ARP, IGMP and PPPoE, which has been proven in various applications for several years. 16Kbytes internal buffer is included for data transmission. No need of consideration for handling Ethernet Controller, but simple socket programming is required.For easy integration, three different interfaces like memory access way, called direct, indirect bus and SPI, are supported on the MCU side.

Key Features:

  • High-speed parallel interfaces
  • Low pin count SPI interface
  • Built-in network stack requires minimal microcontroller resources

Application Ideas:

  • Home Network Devices: Set-Top Boxes, PVRs, Digital Media Adapters
  • Serial-to-Ethernet: Access Controls, LED displays, Wireless AP relays, etc.
  • Parallel-to-Ethernet: POS / Mini Printers, Copiers
  • USB-to-Ethernet: Storage Devices, Network Printers
  • GPIO-to-Ethernet: Home Network Sensors
  • Security Systems: DVRs, Network Cameras, Kiosks
  • Factory and Building Automations
  • Medical Monitoring Equipment
  • Embedded Servers



  • High-level input voltage: 2.0 V min 5.5 V max
  • Low-level input voltage: -0.5 V min 0.8 V max
  • Small 80-Pin LQFP Package (see datasheet for detailed dimensions)
  • Operating Temp Range: -40 to 85 °C
  • Storage Temp Range: -55 to 125 °C
  • Internal 16Kbytes Memory for Tx/Rx Buffers
  • 0.18 µm CMOS technology
  • 3.3 V operation with 5 V I/O signal tolerance
  • Small 80-Pin LQFP Package
  • Lead-Free Package
  • Supports Hardwired TCP/IP Protocols TCP, UDP, ICMP, IPv4 ARP, IGMP, PPPoE, Ethernet
  • 10BaseT/100BaseTX Ethernet PHY embedded
  • Support Auto Negotiation (Full-duplex and half-duplex)
  • Support Auto MDI/MDIX
  • Support ADSL connection (with support PPPoE Protocol with PAP/CHAP Authentication mode)
  • Supports 4 independent sockets simultaneously
  • Does not support IP Fragmentation
  • Support Serial Peripheral Interface (SPI MODE 0, 3) Multi-function LED outputs (TX, RX, Full/Half duplex, Collision, Link, Speed)


Downloads & Documentation

Download Details More Info
WIZNet Circuit Cellar Articles - 7.09 MB | updated: 25 Sep 2012 - 2:04 pm
W5100 WIZnet Datasheet - 2.04 MB | updated: 25 Sep 2012 - 1:58 pm
W5100 WIZnet Errata Sheet - 139.88 KB | updated: 25 Sep 2012 - 1:59 pm
W5100 WIZnet Chip Layout Guide - 204.05 KB | updated: 25 Sep 2012 - 2:03 pm
W5100 WIZnet Chip Qualification - 256.12 KB | updated: 25 Sep 2012 - 2:02 pm