The L-Tek FF-LPC546xx is a small, 40-pin development board intended for prototyping general microcontroller applications.
Conveniently integrated with a DAPLink programming/debug interface and packaged as a small 40-pin 0.1” DIP, this platform can be used to prototype applications using a wide range of IO boards and peripherals supported by mbed in the mbed Component library.
It supports Ethernet, USB, and the flexibility of numerous peripheral interfaces and FLASH memory.
You may read more information here.
Or purchase L-Tek FF-LPC546xx here.