Skip to main content

How does MAX3232 work?

How does MAX3232 work?

The MAX232 is an integrated circuit by Maxim Integrated Products that converts signals from a TIA-232 (RS-232) serial port to signals suitable for use in TTL-compatible digital logic circuits. The MAX232 is a dual transmitter / dual receiver that typically is used to convert the RX, TX, CTS, RTS signals.

What’s the difference between MAX232 and MAX3232?

Differences: MAX232 is powered by 5V voltage, and max3232 is powered by 5V or 3.3V voltage. The power consumption of MAX232 is large, when the supply voltage is 5V, the power consumption is 5mA; while the power consumption of MAX3232 is small, when the supply voltage is 5V or 3.3V, the power consumption is 0.3mA.

What is MAX3232 IC?

MAX3232 IC is a converter IC, used to convert RD232 to TTL. This IC includes line drivers-2, line receivers-2 & a circuit for dual charge-pump including ESD protection from terminal to terminal with 15 kV.

What is MAX 3232?

The MAX3232 device consists of two line drivers, two line receivers, and a dual charge-pump circuit with ±15-kV ESD protection terminal to terminal (serial-port connection terminals, including GND).

What voltage is RS232?

Valid RS-232 signals are either in the range of +3 V to +15 V or the range −3 V to −15 V with respect to the common ground (Figure 1-1). To be more specific, the driver output is Logic 0 when the voltage is between +5 V and +15 V and is Logic 1 when the voltage is between -5 V to -15 V.

What is UART vs RS232?

UART is a communications protocol, whilst RS232 defines the physical signal levels. That is, while UART has everything to do with logic and programming, it has nothing to do with the electronics per se. Whilst RS232 refers to the electronics and hardware needed for serial communications.

Why is MAX232 needed?

MAX232 IC is widely used for serial communication among Microcontrollers & PC. The main function of this integrated circuit is to change the logic levels of TTL/CMOS to RS232 throughout the serial communication process.

What are the RS-232 voltage levels?

What is the MAX3232 device?

The MAX3232 device consists of two line drivers, two line receivers, and a dual charge-pump circuit with ±15-kV ESD protection terminal to terminal (serial- port connection terminals, including GND).

How many lines of RS-232 communication does the MAX3232 have?

Max3232 has two lines of RS-232 communication and their respective two channels of TTL and also power supply pins (3-5,5V-GND). How to connect M-Duino PLC with the Max232?

How to connect M-Duino plc with the MAX232?

How to connect M-Duino PLC with the Max232? M-Duino has two available serial TTL, RX1/TX1 (or Serial1) and RX3/TX3 (or serial3). Connecting RX1/TX1 with T1IN/R1OUT and RX3/TX3 with T2IN/R2OUT the MAX3232 is ready to transmit and receive the data (don’t forget to connect the power supply).

How to test if MAX232 is working?

Once the connections are set it’s possible to proceed to upload a sketch to test if the MAX232 is working as expected. On this sketch, it’s just used one of them because the other it’s just a copy. Actually, the MAX232 is doing all the hard work, for the user just have to code as a normal TTL serial port using serial1 or serial3 as is shown below.