In a typical RS-485 network, multiple nodes may be connected on the bus and the distance of communicating nodes can be as far as 4000-5000 feet. While communicating at such large distances, usual common mode of non-isolated RS-485 transceiver is not sufficient. ISOW14x2 has integrated isolation barrier with upto 1500 Vpk working voltage rating. Isolation breaks the ground loop between the communicating nodes and allows for data transfer in the presence of large ground potential differences. These devices have a higher typical differential output voltage (V_OD) than traditional transceivers for better noise immunity. A minimum differential output voltage of 2.1 V is specified when V_ISOIN is configured for 5 V supply which meets the requirements for PROFIBUS applications.

The ISOW14x2 family of devices is suitable for applications that have limited board space and require more integration. Only external bypass capacitors are needed to fully realize an isolated RS-485 port. This family of devices is also suitable for very-high voltage applications, where power transformers for discrete isolated supply meeting the required isolation specifications are bulky and expensive. Though the device family is full-duplex, it can also be used for half-duplex applications by connecting driver output (Y , Z) to receiver input (A , B) on PCB- this helps to reduce cabling costs. For more details, refer to Application Information.