• Flexible, well-developed IP protocol stack
  • TTL serial interface
  • Two serial ports
  • Accepts 5 VDC regulated Input power
  • HTTP, serial, Telnet and SNMP management
  • Flash ROM for easy software upgrades
  • Custom protocol support available
  • 256-bit AES encryption for secure communication

Overview for Micro125

Build 10/100 Base-T Ethernet Connectivity into Your Products Quickly and Economically

The Lantronix Micro125 is a board-level product for OEM users who want to embed proven mainstream Ethernet connectivity in their products quickly and economically.

Building Ethernet connectivity into a product is no simple task. It requires a significant investment in hardware and software integration – often in areas outside of core competencies. So why build it yourself when there is a better alternative?

The Micro125 embedded device server provides an integrated solution to add proven Ethernet connectivity to an existing design quickly and economically, and with a high level of flexibility.

Device networking starts with a Device Server. These amazing products enable most any device with serial capability (TTL) to become a fully functional member of an Ethernet network. Device Servers include all of the elements needed to network-enable your products – a processor, real-time operating system (RTOS), a robust TCP/IP stack, a web server, and a network connection. All the connected product additionally needs is a header, providing connections to a power source and to a TTL serial port.

The Micro125 brings over a decade of device networking experience, rock-solid IP firmware, extensive applications support and advanced encryption standards to industrial and commercial environments.

Measuring only 49 x 40 mm the Micro125 can easily fit into almost any size serial device that would benefit from network connectivity. It includes a serial interface TTL connector and 10/100 Base-T Ethernet RJ45 jack. The Micro125 includes the same IP protocol stack found on the other Lantronix embedded products.

RoHS-compliant, the Micro125 meets Directive 2002/95/EC on the restriction of the use of certain hazardous substances in electrical and electronic equipment.


Features & Specifications for Micro125



Networking Interface

  • RJ45 (10/100Base-T) Ethernet

Serial Interface

  • TTL level (Asynchronous)

Data Rates

  • 300bps to 230Kbps

Serial Line Formats

  • Characters: 7 or 8 data bits
  • Stop Bits: 1 or 2
  • Parity: odd, even, none

Modem Controls


Flow Control

  • XON/XOFF (Software)
  • CTS/RTS (Hardware)


  • HTTP
  • SNMP
  • Serial login
  • Telnet login
  • Security
  • Optional 256-bit AES
  • Password protection

System Software

  • Flash ROM standard: downloadable from a TCP/IP host (TFTP) or over serial port

Diagnostic LEDs

  • Serial channel status
  • Ethernet link status
  • Diagnostic information


  • Ethernet: Version 2.0/IEEE 802.3

Power Requirements

  • 5 VDC +/-5% at ~ 200mA


  • Flash: 512K
  • RAM: 256K – zero wait


  • Standard Temperature: 0° to 70°C (32° to 158°F)
  • Storage Temperature: -40° to 85°C (-40° to 185°F)

Physical Dimensions (H x W)

  • 49 x 40 mm (1.929 x 1.575 in)