The CA-IS309x family of devices is galvanically-isolated RS- 485/RS-422 transceivers with built-in isolated DC-DC  converter, that eliminates the need for a separate isolated  power supply in space constrained isolated designs. All  devices of this family have the logic input and output  buffers separated by a silicon oxide (SiO₂) insulation barrier  that provides up to 5kV_RMS (60s) of galvanic isolation and  ±150kV/μs typical CMTI. Isolation improves data  communication by breaking ground loops and reduces  noise where there are large differences in ground potential  between ports. An integrated DC-DC converter generates  the 3.3V or 5V operating voltage for the cable-side.  

The CA-IS309x family of devices is designed for high-speed  multi-drop operation with high ESD protection of up to  ±20kV HBM on the bus pins. The receiver is 1/8-unit load,  allowing up to 256 transceivers (loads) on a common bus.  The CA-IS3092W/CA-IS3092VW and CS-IS3098W/CA-IS3098VW provide half-duplex transceivers, the driver and  receiver enable pins let any node at any given moment be  configured in either transmit or receive mode which  decreases cable requirements. The individual logic supply  input of CA-IS3092VW and CA-IS3098VW devices allows  fully compatible 2.7V to 5.5V logic on logic input/output  lines.