MAX3232 RS232 to TTL Serial Converter Module

The MAX3232 RS-232 to TTL Serial Converter Module allows microcontrollers (like Arduino, Raspberry Pi, or ESP32) to communicate with legacy serial devices (like PCs, modems, or PLCs). It translates standard RS-232 voltage levels to TTL/CMOS levels (\(0\text{V}\) to \(3.3\text{V}\) or \(5\text{V}\)) and operates on a flexible \(3\text{V}\)—\(5.5\text{V}\) power supply. [1, 2, 3, 4, 5]

It typically features:

• True RS-232 Levels: Converts \(RX\), \(TX\), \(CTS\), and \(RTS\) signals.
• Standard Baud Rates: Supports communication speeds up to \(120\text{ kbps}\).
• Compact Design: Equipped with a DB9 connector for RS-232 and standard breadboard-friendly pins for TTL. [1, 2, 3, 4, 5]