Why the name max232

If we want to send the data from the microcontroller to a personal computer then we require changing data to Rs level from TTL. The highest distance it can transmit data ranges from 12 — 15 meters. So this IC is applicable in terminals, modems, computers, scanners, printers, fax machines, etc. The following circuit is applicable for microcontrollers. The circuit can be built with the MAX IC and four exterior capacitors for producing maximum voltage internally.

MAX has a lot of applications including battery powered systems, terminals, modem, computer etc. Further detail about MAX will be given later in this tutorial. So, that is all from the tutorial Introduction to MAX Connect this pin to Txd pin of DB9 Port. Outputs the converted signal in TTL form. Signal is recevied from Pc at R1In Pin. Connect this pin to your module TTL Rxd pin which receives the signal. Signal is transmitted from txd pin of microcontroller serial port.

Connect this pin to your module Txd pin. This ic is very important in case when we need to make connection and transfer data between devices that works on different signal level wave forms TTL, Rsc etc. TTL vs RS signal wave form. There are many versions of this IC and they all have different requirements for their external support capacitors. This package comes in different versions and each version requires different value capacitors.

The table above shows some of the MAX versions and their external support capacitor requirement. If you do not like the idea of using capacitors, then there is always the MAXCPP, which does not require the support capacitors.

However, be prepared to pay a little more for that chip. For one, you learn a lot more that way, and it is cheaper if you already have some recycled capacitors.