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WIZ105SR is not discontinued, but we do not recommend it for new designs.

Technical support for this product has officially ended.

Please check WIZ750SR-105 instead.


WIZ105SR-EVB is a evaluation board for WIZ105SR.

WIZ105SR is the serial to Ethernet module using W5100 & 8051 MCU. WIZ105SR is the protocol converter that transmits the data sent by serial equipment as TCP/IP data type, and converts back the TCP/IP data received through the network into serial data to transmit back to the equipment.

Hardware Specification

WIZ105SR Module

  • TCP/IP : W5100
  • PHY : Embedded in W5100
  • RJ-45 : RB1-125BAG1A (Transformer Integrated)
  • MCU : 8051 (GC89L591A0-MQ44I) : SRAM : 16K Byte, EEPROM : 2K Byte
  • Serial : 3.3V LVTTL

Base Board

  • Module Interface : 2×6 12PIN 2mm DIP Header (Male)
  • Serial Connector : D-SUB, 9PIN, Right Angle, Male
  • RS-232 Transceiver : SP3232ECN
  • Power : DC Jack mounted (External : 4.5Ø, Internal :1.3Ø)


  • Power Adaptor (5V, 2A), UTP LAN Cable (2M), Serial Cable, WIZ105SR-CBL (connection cable between module & base board)


  • Configuration Tool for Windows
  • WizVSP: Virtual Serial Port (COM port) for User’s Programs

Evaluation Board Interface