Max232 IC is designed by Maxim Integrated Products. This IC is widely used in RS232 Communication systems in which the conversion of voltage level is required to make TTL devices to be compatible with PC serial ports and vice versa.
This chip contains charge pumps which pump the voltage to the Desired Level. It can be powered by a single +5 volt power supply and its output can reach +_7.5 volts. MAX232 comes in 16 Pin Dip and many other packages and it contains Dual Drivers.
It can be used as a hardware layer converter for 2 systems to communicate simultaneously. Max232 is one of the versatile ICs to use in most of the signal voltage level conversion problems.