The MAX3232 RS232 to TTL Serial Converter Module is a compact communication board built around the MAX3232 transceiver IC. It converts between RS232 signal levels and TTL-level serial signals, allowing devices such as computers with a COM port to communicate with microcontrollers, breadboard circuits, and other TTL serial devices. BDTronics provides this converter module for electronics, robotics, prototyping, and related applications in Bangladesh.

Features:

• Based on MAX3232 transceiver IC for RS232 to TTL signal conversion
• Female DB9 COM connector for direct connection to a computer serial port
• 4-pin header interface with TXD, RXD, GND, and VCC
• Compact board dimensions of 33mm x 32mm x 14mm
• Supports serial data rates up to 250 kbit/s
• Typical low supply current of 300 µA

Specifications:

Specification	Details
Integrated Circuit	MAX3232
Operating Voltage	3.3V-5V DC
Operating Current	6mA
Power Supply	External
Interface	TXD, RXD, GND, VCC
Connector	Female DB9 COM connector
Header	4-pin
Data Rate	Up to 250 kbit/s
Typical Supply Current	300 µA
Dimensions	33mm x 32mm x 14mm

Applications:

• Connecting a computer COM port to TTL serial microcontroller circuits
• Serial communication experiments on breadboards and microcontroller project boards
• Microcontroller projects requiring an RS232 interface
• Serial communication between RS232 equipment and TTL-level devices
• Prototyping and repair work involving RS232 to TTL conversion

How to Use:

1. Connect the VCC pin to a 3.3V-5V DC external supply and connect GND to the common ground of the TTL device.
2. Connect the TTL device TX line to the module RXD pin and the TTL device RX line to the module TXD pin.
3. Connect the female DB9 connector to a compatible RS232 COM port on a computer or serial device.
4. Check the voltage and wiring before powering the system, then open serial terminal software with matching serial settings.

Installation and Wiring:

The module has a female DB9 connector at one end and a 4-pin header at the other end. It is designed for RS232-to-TTL serial communication. Use a stable external power supply within the 3.3V-5V DC range, keep grounds common between the module and the TTL device, and verify TXD/RXD signal direction before operation. For breadboard or microcontroller use, jumper wires can connect the 4-pin header to the target board. For electronics prototyping and serial communication projects, BDTronics offers this MAX3232-based module as a compact RS232-to-TTL interface.

Compatibility:

• TTL-level UART devices operating with 3.3V to 5V logic
• Computer or equipment with an RS232 DB9 COM port
• Breadboards and microcontroller project boards with accessible TXD, RXD, and GND pins

Safety Information:

• Do not exceed the specified 3.3V-5V DC operating voltage range.
• Observe correct polarity on VCC and GND.
• Use a common ground between the converter and the TTL device.
• RS232 signals use different voltage levels from TTL logic; do not connect RS232 signals directly to TTL pins without a converter.

Package Includes:

• 1 x Serial Port RS232 to TTL Converter Module Female DB9 COM Connector Based on MAX3232 IC

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