MAX3232 RS232 to TTL Converter Module

This is a small handy module for rapid prototyping projects requiring RS232/PC interface to robotics and microcontroller based projects using 3.3V or 5V TTL logic.  This module converts signals between RS232 voltage levels and TTL voltage levels. 

Features:

• Working voltage:3.3V-5.5V
• Size : 30mmx20mm / 1.18''x0.78''
• Weight 14g approx.
• High speed, built in SMD MAX3232 device fitted.
  
• Supports Data Transfer upto 115kbps or even higher in short bursts.
• Works with PCs or Laptops.
• Tested with microcontroller UARTs e.g. Microchip PIC16F877 and Atmel AVR (ATMEGA8515) devices.
• Selectable +3.3V or +5V signals levels at the TTL level (single 3.3V or 5V supply required via header).
• Status LED (D1)
• It can be used with Microchip PIC, Atmel AVR, STC MCU, NXP MCU, Renesas MCU,STM32 MCU and many other such micros. 
• Also used in radio modification, XBOX360 flash, vehicle detection, phone flash, GPS , hard disk repair
• Port: TX RX VCC GND
• Package Included:
  1PCS*MAX3232 RS232 to TTL Serial Converter Module
  4PCS*Dupont cables.

TTL Connections Pinout:

Pin 1: VCC(+) - this pin requires 3.3V (or 5V for 5V TTL logic targets) to be supplied to the board for power.

Pin 2: RX - MAX3232 ROUT1 - This is actually a TTL output - this pin is usually connected to the RX pin of the UART in a microcontroller.
PC Serial Port RS232 level converted from TTL level input

Pin 3: TX - MAX3232 DIN1 - This is actually a TTL input - this pin is usually connected to the TX pin of the UART in a microcontroller.
PC Serial Port RS232 level converted to TTL level output

Pin 4: GND - this pin is the ground pin. This pin is usually connected to the 0V rail of the application hardware. Fully assembled.

Free software and terminal program
Free software and terminal program

Related information:
ASCII Serial Port Crib Sheets
MAX3232 - RS232 TTL IC Data sheet