tuanyuan MAX3232 RS232 to TTL Serial Converter Module DB9 3.3V-5.5V 30mmx20mm Black

What this module does

The tuanyuan MAX3232 converts RS232 serial signals to TTL logic levels for direct connection to microcontroller UART pins. It operates from 3.3V to 5.5V and measures 30mm by 20mm. A DB9 connector provides the RS232 interface while a pin header breaks out TX, RX, VCC and GND for the logic side.

Who should use it

Hobbyists and engineers needing a compact level shifter for STC, NXP, Renesas, STM32 or similar MCUs will find it suitable for radio modification, GPS modules, vehicle detection or set-top box debugging. Builders who require isolated communication, higher voltage tolerance or multiple channels should look at other solutions.

Behaviour under continuous use

The domestic MAX3232 chip maintains stable voltage translation across the full 3.3V to 5.5V supply range during prolonged data streams. Its small 30mm by 20mm PCB dissipates heat adequately for typical UART baud rates without active cooling. No thermal throttling or signal degradation is observed in long-running flash or diagnostic sessions.