In summary, the ADM3251E is a fully isolated RS-232 transceiver based on Analog Devices iCoupler technology which uses chip-scale integrated transformers to electrically isolate the power and signal lines. This technology not only reduces costs but also increase performance, and reliability. Another useful feature of this product is a fully integrated DC-to-DC converter which reduces board space, simplifies the design and lowers the total manufacturing costs. For more information on the electrical specifications and recommended PCB layout please Click here for the complete datasheet.