FTDI FT232RL USB to TTL Serial Converter Adapter 3.3V/5V (Mini USB)
VAT inclusive; Computed calculations added locally.
Overview
The FTDI FT232RL USB to TTL Serial Converter Adapter is a compact USB-to-UART interface designed for programming microcontrollers, communicating with embedded systems, and debugging serial devices. Built around the FT232RL USB-to-serial interface IC, it provides a convenient bridge between a computer's USB port and TTL-level UART signals.
With a 6-pin 2.54mm interface and selectable 3.3V/5V operation, this adapter is suitable for a wide range of development boards and microcontrollers. The exposed TX, RX, VCC, GND, and DTR connections make it particularly useful for Arduino Pro Mini programming, where the DTR signal can assist with automatic reset during firmware uploads.
Onboard TX and RX indicator LEDs provide convenient visual feedback during serial communication, while the resettable USB-side fuse offers additional protection against certain short-circuit conditions.
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Product Technical Information
Technical Details
The FTDI FT232RL USB to TTL Serial Converter provides a simple way to connect a computer with USB to microcontrollers and other devices that use TTL-level UART serial communication.
The adapter is particularly useful for Arduino Pro Mini programming, firmware uploading, serial monitoring, embedded-system debugging, and communication with compatible modules. Its DTR pin can be used for automatic reset on boards that support this programming method.
Key Features
- FT232RL USB-to-UART interface IC
- Mini USB connector
- 6-pin TTL interface
- 2.54mm pin spacing
- Selectable 3.3V and 5V TTL operation
- DTR signal for compatible automatic-reset applications
- TX and RX activity LEDs
- Power indicator LED
- 500mA resettable PTC fuse
- Compact PCB design
- Suitable for Arduino Pro Mini and other TTL UART devices
Arduino Pro Mini Connection
For a typical Arduino Pro Mini programming connection:
FTDI Adapter Arduino Pro Mini ---------------------------------- GND → GND VCC → VCC TX → RX RX → TX DTR → GRN/Reset
Applications
- Arduino Pro Mini programming
- Microcontroller firmware uploading
- UART serial communication
- Embedded-system debugging
- Robotics telemetry
- Modem and communication module configuration
- STC microcontroller programming
- Router and embedded-device serial interfaces
- Custom electronics development
Important Notes
- TX and RX must normally be crossed: adapter TX → target RX and adapter RX → target TX.
- Verify the target device's logic voltage before connecting it.
- Do not apply 5V TTL signals to a device designed only for 3.3V logic.
- Select the appropriate voltage configuration before connecting the adapter.
- The resettable fuse provides protection against certain overcurrent conditions but does not guarantee protection against incorrect wiring or voltage levels.
- Product images are for illustration purposes and may differ from the actual product.
Package Includes:
- 1 × FTDI FT232RL USB to TTL Serial Converter Adapter
Frequently Asked Questions
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