The KY232 series devices are EIA/TIA-232 and V.28/V.24 communication interfaces achieves 1μA supply current. A proprietary, high-efficiency, dual charge-pump regulated voltage converters and a low-dropout transmitter combine to deliver true RS-232 performance.
These devices can operate from a single 5V supply at the guaranteed data rate of 250k bits/sec with enhanced electrostatic discharge (ESD) protection in all RS232 I/O pins exceeding ±15kV EN61000-4-2 Air Gap Discharge and ±8kV EN61000-4-2 Contact Discharge.
KY232E数据手册 
