RS232 to TTL Serial Interface Module – MAX3232 DB9 Converter with 4-Pin

The RS232 to TTL Serial Interface Module is a compact, high-reliability solution for converting RS232 signal levels to TTL logic levels, enabling microcontrollers to communicate directly with serial devices. Based on the industry-standard MAX3232 IC, this module supports both 3.3V and 5V logic, making it versatile for use with a wide range of development boards including Arduino, STM32, STC, NXP, Renesas, and others.

The module features a DB9 female connector for interfacing with standard COM ports, and a 4-pin male header with jumper wires for easy TTL connections to breadboards or microcontroller pins. With support for data rates up to 250 kbps, it’s ideal for reliable serial communication in embedded systems, programming tools, and debugging interfaces.

🔧 Key Features

• RS232 to TTL Serial Interface Module with MAX3232 transceiver
• Supports voltage input from 3.3V to 5.5V
• DB9 connector for RS232 signal input
• 4-pin male header for TTL output (TX, RX, VCC, GND)
• Includes dual drivers and receivers with ±15kV ESD protection
• Pre-assembled compact board for quick integration
• Supports baud rates up to 250 kbps
• Ideal for use in STC/NXP/STM32/MCU programming

📐 Technical Specifications

📌 Applications

• Microcontroller programming and serial debugging
• Radio firmware upgrades and GPS module interfacing
• DVD flash tools and hard disk repair
• Set-top box upgrades and vehicle detection systems
• Serial communication between PC and TTL devices

💡 Why Choose This Product?

The RS232 to TTL Serial Interface Module is an essential tool for developers and technicians working with serial interfaces. Its compact design, robust MAX3232 chip, and wide compatibility make it a reliable choice for programming, data transfer, and communication between devices operating at different voltage levels.

📦 Package Includes

• 1 × RS232 to TTL Serial Interface Module (MAX3232)