Hello everyone! I hope you all will be fine and having fun. Today, I am going to give you a detailed Introduction to MAX232. It is an Integrated Circuit(IC) embedded in a single chip and acts as a voltage-level converter. MAX 232 is capable of converting 5V TTL Logic level to TIA/EIA-232-F level and can take up to +-30V input. It is normally used for the communication between microcontroller and Laptop/PC.
We can use MAX-232 to convert Transistor Transistor Logic (TTL) voltage level to RS232 and vice versa. RS232 is the method of transferring data using serial communication. MAX 232 is a dual receiver or driver having a capacitive voltage generator to supply RS232 voltage levels from a single supply of 5V. Each receiver converts RS232 inputs to 5V either Transistor Transistor Logic (TTL) or Complementary Metal Oxide Semiconductor (CMOS) levels. Whereas each of the drivers converts TTL or CMOS levels to RS232 levels.
RS232 receiver receives the input from the serial pins of the microcontroller. The receiver also receives the input from RS232's serial port and provides the output to the microcontroller's receiver pin. Four external capacitors are needed for MAX-232 and their values are ranging from 1uF to 22uF. MAX 232 has a lot of applications including battery-powered systems, terminals, modems, computers etc. Further details about MAX-232 will be given later in this tutorial.
MAX232 Pinout | |||
---|---|---|---|
Pin No. | Pin Name | Pin No. | Pin Name |
Pin # 1 | Capacitor 1+ | Pin # 9 | R2 Out |
Pin # 2 | Capacitor 3+ | Pin # 10 | T2 In |
Pin # 3 | Capacitor 1- | Pin # 11 | T1 In |
Pin # 4 | Capacitor 2+ | Pin # 12 | R1 Out |
Pin # 5 | Capacitor 2- | Pin # 13 | R1 In |
Pin # 6 | Capacitor 4- | Pin # 14 | T1 Out |
Pin # 7 | T2 Out | Pin # 15 | GND |
Pin # 8 | R2 In | Pin # 16 | Vcc |
So, that is all from the tutorial Introduction to MAX232. I hope you have enjoyed this tutorial. If you have any kind of problem, you can ask me in the comments any time you want to ask, without even feeling any sort of hesitation. I will try my level best to solve your issues in a better way, if possible. Our team is also here to help you. I will explore further ICs in my later tutorial and will surely share all of them with you as well. So, till then, Take Care :)
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