Why MAX232 IC is used in serial communication?

What is a MAX232 IC? Generally, the MAX-232 IC is used in the RS232 communication system for the conversion of voltage levels on TTL devices that are interfaced with the PC serial port and the Microcontroller. This IC is used as a hardware layer converter like to communicate two systems simultaneously.

What is the function of the chip MAX232?

The MAX232 is a dual transmitter / dual receiver that typically is used to convert the RX, TX, CTS, RTS signals. The drivers provide TIA-232 voltage level outputs (about ±7.5 volts) from a single 5-volt supply by on-chip charge pumps and external capacitors.

What is the RS-232 interface?

RS-232 defines the connection between data terminal equipment (DTE) and data circuit-terminating equipment (DCE). Data terminal equipment is any end user device, such as a computer, that can be used to send data over a network.

What is TTL IC?

Transistor–transistor logic (TTL) is a logic family built from bipolar junction transistors. TTL integrated circuits (ICs) were widely used in applications such as computers, industrial controls, test equipment and instrumentation, consumer electronics, and synthesizers.

How do I know if my MAX232 is working?

Testing steps:

Ensure the tester is powered off.
Insert MAX232 chip to the ZIF socket.
Push SW1 to turn power on.
Push test button and check the green LED.
Test the serial data stream with COM port tester. When we press keys (Green), it will echo back to terminal in Yellow.
Push SW1 to turn power off.
Take the chip out.

What is RS232 and MAX232?

The RS-232 is simply a series of standards for serial data transmission, while the MAX232 is one of many available RS-232 standard compliant transceivers intended for implementing an RS-232 interface. RS-232 – Wiki. The RS-232 Standard. TI and others also offer a MAX232 equivalent device.

What does RS232 stand for?

Recommended Standard 232
In telecommunications, RS-232, Recommended Standard 232 is a standard originally introduced in 1960 for serial communication transmission of data.

What is difference between RS-232 and RS485?

RS232 is more than able to perform for a short distance and low data speed requirements. RS232 has a transmission speed of 1Mb/s up to 15M. However, RS485 has a data transmission speed of up to 10Mb/s for a distance of 15M. At the maximum of 1200M, RS485 transmits at 100Kb/s.

What is the difference between RS232 and RS485?

How to connect RS232 to Atmel at89s51 / 89s52 microcontroller?

Inorder to connect RS232 to AT89S51/52 microcontroller, a converter is required. Here we make use of MAX232. This can convert the output of the microcontroller to the RS232 output level and vice versa.

How does MAX232 IC work with microcontroller?

And If it don’t have any RX,TX pins and only have a RS232 port (serial port with 9) then you need to use MAX232 IC to connect serial port to the microcontroller. Basically MAX232 used to convert serial data into TTL logic because Microcontroller can only work on TTL logic.

Can a microcontroller interface with a GSM module?

Instead of using PC, we can use microcontrollers to interact with GSM module and LCD to get the response from GSM module. So we are going to interface GSM with a 8051 microcontroller (AT89S52). It’s very easy to interface GSM with 8051, we just need to send AT commands from microcontroller and receive response from GSM and display it on LCD.

Is the DB-9 RS-232 compatible with the TTL?

DB-9 RS-232 is a serial I/O standard, used commonly in PCs and other devices. The output of RS232 is not compatible with the TTL. Inorder to connect RS232 to AT89S51/52 microcontroller, a converter is required. Here we make use of MAX232.