The ST3241E device consists of 3 drivers, 5 receivers and a dual charge-pump circuit. The device meets the requirements of EIA/TIA and V.28/V.24 communication standards providing high data rate capability and enhanced electrostatic discharge (ESD) protection. All transmitter outputs and receiver input are protected to 8 kV USING IEC 1000-4-2 contact discharge and 15 kV using the human body model. The receiver R2 is always active to implement a wake-up feature for serial port.