New Product

Embedded Wi-Fi/Bluetooth adapter

Embedded Bluetooth V4.2 Module

USB 3.0 to Gigabit LAN

Universal Communication EVK

Wireless Sensor (BLE or Wi-Fi)

AIO Network Hub (USB/Wi-Fi/LAN)


PSTN, Dial-Up Modems

By Interfaces -

- Serial TTL, Internal

- RS232, Internal, 12/24/48V

- RS232, Standalone

- USB, Internal

- USB, Standalone

- PC/104

- ISA Bus


By Applications -

- Medical Modems

- Contact ID Modems

- Leased-Line Modems

- Bell 202 Compatible

- Speakerphone Modems


Wireless Modems

Wi-Fi Modems -




Bluetooth Modems

3G Cellular Modems

2.4GHz Transceiver


LAN Products

Serial to Ethernet Modules

USB to Ethernet Adapters

LAN/Wi-Fi/USB/Serial Converter

LAN to Serial/Modem Adapter


PC/104 Products

PC/104 Modem

PC/104 3G Cellular

PC/104 Wi-Fi

PC/104 LAN


Custom Specifications

Build-to-Suit, Wired or Wireless


Embedded Serial-to-Ethernet Modules






Measuring only 1 (W) x 1 (D) x 0.25 (H), the LSHM-200 family of Embedded Serial-to-Ethernet Modules connect serial devices to IP networks with a 10/100BaseT interface.  They provide an easy solution for connecting micro controller based systems with serial port to IP networks for remote control, and monitoring applications.

The LSHM-200 family allows for seamless access and communications of serial data through any 10/100BaseT Ethernet.  They can transfer data among multiple IP addresses simultaneously via Telnet ports with TCP/IP protocols under Ethernet.  The onboard Ethernet functions are designed to meet IEEE std 802.3 with automation and buffering.  The integrated serial port includes standard serial terminal features such as flow control and standard 8-N-1character lengths.

The serial interface of LSHM-200 family supports DTE speeds up to 230K bps.  The LSHM-200 family features -40oC to +85oC operating temperature and are RoHS compliant.

There are two models available, LSHM-200 and LSHM-201.  The LSHM-200 includes 2-channel DMA and a 7-bit 2-channel ADC while the LSHM-201 has a 4-channel DMA and an 8-bit 8-channel ADC built in.  The LSHM-201 includes external Flash memory allowing for updating firmware with the latest enhancement or implementing firmware changes for custom applications.

The Development Kit LSDK-2001 and LSDK-2011 are designed for engineer's testing, programming and evaluation convenience.  Each kit includes an LSHM-200 or LSHM-201 mounted on our carrier board with all needed connectors, power adapter and cable accessories.


  • Compact size - 1" x 1" x 0.25" (H)

  • -40oC to +85oC operating temperature

  • Serial TTL interface

  • 10/100BaseT network interface, auto-detect

  • 10MB or 100MB data transfer rate configurable

  •  Designed to meet IEEE std 802.3

  • Complete Serial-to-LAN connectivity solution including:
    Network Processor, Mac and PHY interface

  • Support of TCP/IP, UDP, Telnet, HTTP, ICMP and ARP

  • DHCP and static IP support

  • LED pins out for monitoring LAN and link activity

  • Built-in 32K SRAM for Ethernet buffering

  • NVRAM for storage of configurations

  • External flash memory (LSHM-201 only)

  • DTE data speed up to 230K bps

  • Hardware and software flow control


  • ATM Terminals
  • Data Collection
  • POS Terminals
  • Remote Diagnostics
  • Remote Monitoring
  • Remote Metering
  • Security Systems
  • Vending Machines
Ratings @ 25o C






Operating Temperature -40 +85 +25 C
Relative Humidity (non-condensing) +10 +90 N/A %
Voltage Requirement: 3.3V system 3.0 3.6 3.3 VDC
Power Consumption 780 1080 900 mW
Current 260 300 274 mA

Ordering Information

Model Number

Interfaces VCC Dimensions


Serial TTL Ethernet 3.3 VDC 1" x 1" x 0.25"(H) Connect serial device to IP networks with a 10/100BaseT interface.
Serial TTL Ethernet 3.3 VDC 1" x 1" x 0.25"(H) Same functionality as LSHM-200 but with external Flash memory allows making changes to web server application via Telnet or FTP.
Serial RS232 Ethernet 5 VDC 1.2" x 3" x 0.63"(H) Serial-to-LAN module with DB9 male, RJ45 and power connectors installed.
Serial RS232 Ethernet 5 VDC 1.2" x 3" x 0.63"(H) LSHM-201 on a carrier board with DB9 male, RJ45 and power connectors installed.
Serial RS232 Ethernet 5V to 48VDC 2.5" x 2.6" x 0.63"(H) Serial-to-LAN module with DB9 male, RJ-45 connectors. 5V to 48V VCC support.
Serial RS232 Ethernet
5 VDC 2.5" x 3.0" x 0.68"(H) Serial-to-LAN module with DB9, RJ-45 jack and a 56kbps Dial-up modem installed.

LSDK-2001 Development Kit includes:

  • LSHM-200 (Serial-to-Ethernet Module)

  • LSDB (Serial-to-Ethernet Development Board)

  • Power Adapter

  • DB9(M) to DB9(F)

  • RJ45 CAT5 Ethernet Cable

  • LSHM-200 and LSDK-2001 Manual


LSDK-2011 Development Kit includes:

  • LSHM-201 (Serial-to-Ethernet Module)

  • LSDB (Serial-to-Ethernet Development Board)

  • Power Adapter

  • DB9(M) to DB9(F)

  • RJ45 CAT5 Ethernet Cable

  • LSHM-201 and LSDK-2011 Manual


Mechanical Diagram & Pin Assignments - LSHM-200 / LSHM-201


  1. Pin spacing is 0.100 inch from center to center.

  2. Suggested mating female connector:

             Samtec P/N. #SSW-110-21-G-S (RoHS Thru-Hole)

             Samtec P/N. #SSW-110-22-G-S-VS (RoHS SMT)

  3. Square pins - 0.025" x 0.025"


Information furnished by Radicom Research is believed to be accurate and reliable.  However Radicom Research assumes no responsibility for its use, or any infringement of patents or other rights of third parties which may result from its use.  Radicom Research reserves the right to change circuitry at any time without notice.  This document is subject to change without notice.

The information contained herein is subject to change without notice. Logos, trademarks and copyrights are property of their respective owners.


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