The SN75189N with RS-232 Interface IC Quad Line from Texas Instruments is a four-channel, low-power, low-voltage, bidirectional RS-232 line-driver/line-receiver. It is designed for uninterrupted data transmission between TTL/CMOS and RS-232 components.The device has two buffer transmitters and two buffer receivers, providing full-duplex communication capability. The output drivers are capable of handling data input rates up to 250 kbps, while operating with input voltage ranging from -7V to +12V. It has ESD tolerance of greater than 8 kV.The SN75189N provides expansibility for a variety of data transmission applications. It can be used to build multidrop networks, control peripherals, and perform data communication between local and remote systems. It is suitable for use in portable communication devices and other applications that require a low-power and low-voltage interface.