THVD4431 is a highly integrated multiprotocol transceiver supporting RS-232, RS-422 and RS-485 physical layer and is used for asynchronous data transmissions. MODE pins allow for the configuration of different operating modes. Device allows point-to-point RS-232 communication port and multipoint RS-485 communication port over common connector. The device also features integrated 120Ω switchable termination resistor on RS-485 bus lines which enables same device to be used for middle nodes or end nodes in an RS-485 network. When the device is configured in RS-232 mode, RS-485 circuits and 120Ω termination are disabled and do not interfere in RS-232 communication. For RS-232 communication, charge pump and 5kΩ resistor to ground on receiver bus pins is integrated in the device. This 5kΩ resistor and charge pump is automatically disabled in RS-485 mode. Slew rate limiting pin is provided so that same device can be used in slow speed or fast speed RS-485 and RS-232 applications. When ultra low power consumption is needed, device can be put in shutdown mode using SHDN pin. All these features make the device completely flexible and suitable for various application needs. Integration of termination resistor saves significant PCB area compared to discrete implementation.