RS232 , Max232 , driver receiver for serial port with explanation

This RS232 driver receiver ca help you many times when you need to connect some circuits to an computer or to interconnect two devices .
One of the most simple way to interconnect two devices is under RS232 port using a RS232 driver receiver circuit .Many chips , microcontrollers and other ICs have a Rs232 port .A chip which is used frequently in many applications to interconnect two devices or to transmit or receive data is MAX232 .
The schematic circuit for the Max232 is very simple and is require just few external capacitors as you can see in the circuit bellow .
Main features of the Max232 , RS232 driver / receiver are : Meets or Exceeds TIA/EIA-232-F and ITU Recommendation V.28 , Operates From a Single 5V Power Supply , Operates Up To 120 kbit/s , Two Drivers and Two Receivers in one chip , ±30-V Input Levels ,Low Supply Current . . . 8 mA Typical , ESD Protection.
For most applications is needed to connect Rx , Tx and ground foar each port used .
A typical power supply for this circuit must deliver a 5 volts dc .