RS-232 Transceiver (5 Drivers / 3 Receivers) that is suitable for operation in harsh electrical environments. Contains ESD protection up to 15 kV(TTL & RS-232). Feature an on-board charge pump dc-to-dc converter, eliminating the need for dual power supplies. This dc-to-dc converter contains a voltage tripler and a voltage inverter that internally generates positive and negative supplies from the input 3 V power supply. The dc-to-dc converter operates in Green Idle™ mode, which minimizes the power consumption and makes these products ideal for battery-powered portable devices.