TTL FTDI Transmitter USB For 3.3V/5V Dual power-FT232RL MWC Programmer

TTL FTDI USB to Serial Converter (FT232RL, 3.3V/5V Dual Power)

The TTL FTDI USB to Serial Converter is a reliable and high-performance USB-to-UART serial converter module designed for programming, debugging, firmware flashing, and serial communication with microcontrollers and TTL-based devices. Built around the FTDI FT232RL chip, it provides stable communication between a computer’s USB port and compatible TTL serial interfaces.

The module supports both 3.3V and 5V output levels, allowing it to work with a wide range of development boards and embedded systems. The output voltage can be selected using the onboard solder jumper, providing flexibility when working with different logic-level devices.

An integrated DTR pin provides automatic reset functionality, making the module particularly useful for programming boards such as the Arduino Pro Mini and other microcontrollers with serial bootloaders. Built-in TX and RX indicator LEDs provide visual feedback during data transmission and reception.

With a compact Mini USB connector and a transfer speed of up to 1 Mbps, this converter is suitable for Arduino projects, embedded development, robotics, industrial electronics, firmware flashing, UART debugging, and general-purpose serial communication.

Features

• FTDI FT232RL USB-to-Serial bridge controller
• USB-to-TTL UART serial communication
• Supports 3.3V and 5V output levels
• Selectable output voltage through solder jumper
• Automatic reset through DTR pin
• Suitable for Arduino Pro Mini programming
• Built-in TX and RX indicator LEDs
• Mini USB connector
• Plug-and-play USB connectivity
• Virtual COM port support
• Data transfer speed up to 1 Mbps
• Low-power management during idle and standby operation
• Compact design for embedded applications
• Suitable for firmware flashing and debugging
• Compatible with a wide range of TTL-based devices
• Suitable for hobby and professional development

Specifications

Parameter	Specification
Product Type	TTL FTDI USB to Serial Converter
USB-to-Serial IC	FTDI FT232RL
Interface	USB to TTL UART
USB Connector	Mini USB
Output Voltage	3.3V / 5V
Voltage Selection	Solder Jumper
Maximum Data Rate	Up to 1 Mbps
UART Pins	TXD, RXD, GND, VCC, DTR, CTS
Reset Function	DTR Automatic Reset
Data Indicators	TX / RX LEDs
Power Management	Idle/Standby Power Reduction
Applications	Programming, Debugging, Firmware Flashing, UART Communication

Design and Construction

The converter features a compact PCB design centered around the FT232RL USB-to-UART bridge controller. The board provides clearly labelled pins for connecting compatible microcontrollers, development boards, and other TTL serial devices.

The onboard solder jumper allows users to configure the output voltage for either 3.3V or 5V, depending on the requirements of the connected device. This makes the module suitable for working with different microcontroller logic levels.

The module includes TX and RX LEDs that provide real-time visual feedback during serial communication. The DTR pin is available for automatic reset functionality, which simplifies programming on compatible boards.

The Mini USB connector provides a compact connection to a computer, making the module convenient for development benches, embedded systems, and portable projects.

Pin Configuration

The module provides the following commonly used connections:

• TXD – UART transmit data
• RXD – UART receive data
• GND – Ground
• VCC – Selectable 3.3V/5V supply
• DTR – Data Terminal Ready / automatic reset
• CTS – Clear To Send

For standard UART communication, connect the converter’s TXD to the target device’s RXD and RXD to the target device’s TXD, along with a common GND connection.

Always verify the target device’s voltage and pin configuration before connecting the module.

Working Principle

The FT232RL acts as a bridge between the computer’s USB interface and the target device’s TTL UART interface.

When connected through the Mini USB port, the FT232RL converts USB data from the computer into UART serial signals. These signals are transmitted through the TXD and RXD pins to the connected microcontroller or embedded device.

During data communication, the TX and RX LEDs indicate the transmission and reception of serial data.

The DTR signal can be used to automatically reset compatible development boards, allowing the bootloader to start during programming without manually pressing the reset button.

The selectable 3.3V/5V output allows the module to interface with compatible devices operating at different TTL logic levels.

Operating System Compatibility

The module is designed for use with major operating systems, including:

• Windows XP
• Windows Vista
• Windows 7
• Windows 8
• Windows 10
• Windows CE
• Linux
• Mac OS X

Driver requirements may vary depending on the operating system and FT232RL driver installation.

Applications

• Arduino Pro Mini programming
• Microcontroller programming
• Firmware flashing
• UART debugging
• Serial data communication
• Embedded system development
• GPS module interfacing
• GSM module interfacing
• Modem communication
• Router firmware flashing
• HDD and storage-device programming applications
• ADSL and broadband modem development
• STC MCU debugging
• NXP MCU debugging
• Renesas MCU development
• NEC MCU development
• Robotics projects
• Electronics prototyping
• DIY electronics projects
• Professional embedded-system development
• Serial terminal communication
• Development and testing

Package Includes

• 1 × TTL FTDI USB to Serial Converter Module

Product Disclaimer

Product images are for illustrative and representational purposes only. The actual product may vary slightly in colour, PCB markings, component placement, connector configuration, dimensions, or overall appearance depending on the manufacturing batch.

The Mini USB cable, Arduino board, microcontroller, GPS/GSM modules, and other components shown in product images are not included unless specifically mentioned in the package contents.

Before connecting the module, verify the required 3.3V or 5V logic level, TX/RX connections, and pin configuration of the target device to help prevent incorrect connections or possible damage.