The ISL4491EIBZ with RS-422/RS-485 Interface IC LD 14LD -40+85 5V RS 485 TRANSC 1TX/1RX is an integrated transceiver circuit from Renesas. It combines differential transceivers, supply regulators and ESD protection into a single low power, single-channel device suitable for reliable data interface applications, reducing component costs and board space. The ISL4491EIBZ supports both RS-485 and RS-422 interfaces, with data rates up to 128Kbps. It features transformer isolation and has wide supply voltage range of -40V to 85V, so it can work with a 3.3V/5V supply. The device also has built-in thebus detection, thermal protection and electrostatic discharge (ESD) protection to ensure reliable operation in critical systems.