• IC Chip: MAX3232
• Operating Voltage: 3.3-5.5V
• It can be used to program STC MCU, NXP MCU, Renesas MCU, STM32 MCU, N -2EC MCU
• Pre-assembled compact size board
• Suitable for use with most microcontrollers
• Operates up to 250 kbit/s

This RS232 to TTL Serial Interface Module is a board with the MAX3232 transceiver integrated circuit (IC). It facilitates serial communication between TTL and RS232 ports by providing the necessary electrical signal conversion.

These boards usually have a DB9 connector soldered at one end, and four header pins with jumper cables at the other end. The jumper cables enable the user to connect the wires to a breadboard or a microcontroller project board, whilst the DB9 connects directly to a COM port of a computer.