This USB to UART (TTL) module makes it easy to connect a computer or other USB devices to TTL logic-level devices like microcontrollers and sensors, providing consistent data communication. With the original FT232RNL chip, this module offers fast, and reliable communication with excellent compatibility. Its castellated hole design and compact size provide easy integration into your projects through soldering. With a UART communication baud rate ranging from 300bps to 3Mbps, this module can adapt to various projects, and it also includes a self-recovery fuse and ESD diode, providing over-current and over-voltage protection for stable and safe operation. The TXD and RXD indicators help monitor the transceiver status, making this module a reliable and user-friendly choice for your data communication requirements. Features * Original FT232RNL chip, fast communication, stable and reliable, better compatibility * Castellated holes design, compact size, easy to integrate into the device by soldering * UART communication baud rate: 300bps~3Mbps * Self-recovery fuse and ESD diode, provide over-current/over-voltage protection, stable and safe operation * TXD and RXD indicators for monitoring transceiver status * Reserved VCC switching pads on the back, using 3.3V TTL by default, allow switching to 5V by re-soldering * Adapting all function pins of the chip, more convenient for secondary development and integration * USB Type-C port, easy plug & pull, solid and reliable * Compatible With Systems Like Win7/8/8.1/10/11, MacOS, Linux and Android Specifications Power Supply 5V Serial Port (TTL Level) 3.3V/5V Baud Rate 300bps ~ 3Mbps Operating System Support Win7/8/8.1/10/11, Mac, Linux, Android, WinCE Resources * Product Wiki * Datasheet Pinout Pin Function Input/Output 5V Provide 5V to external devices - GND Ground - VCC Provide 5V or 3.3 to external devices (By selecting the output voltage via the solder pads on the back.) - TXD Serial Data Transmitting pin, connect to MCU.RX Output RXD Serial Data Receiving pin, connect to MCU.TX Input RTS Send requests, and connect to MCU.CTS Output CTS Clean requests, and connect to MCU.RTS Input DTR# Data terminal ready, for control of external devices, low active Output DSR# Data set ready, detect whether the external device is ready, low active Input DCD# Data carrier detection, low active Input RI# Ring indicator detects whether the external device rings, low active Input RESET# FT232 reset pin, low active (pull low RESET pin, FT232 reset) Input CBUS0-CBUS4 I/O pin Output/Input Package Contents * 1x USB To UART (TTL) Module with a pre-soldered header https://elecena.pl/product/26091762/usb-to-uart-ttl-mini-communication-module-with-a-pre-soldered-header 2024-06-17 https://elecena.pl/product/26091762/usb-to-uart-ttl-mini-communication-module-with-a-pre-soldered-header 2024-09-18 https://elecena.pl/product/26091762/usb-to-uart-ttl-mini-communication-module-with-a-pre-soldered-header 2024-11-29 https://elecena.pl/product/26091762/usb-to-uart-ttl-mini-communication-module-with-a-pre-soldered-header 2024-11-30 https://elecena.pl/product/26091762/usb-to-uart-ttl-mini-communication-module-with-a-pre-soldered-header 2025-02-13 https://elecena.pl/product/26091762/usb-to-uart-ttl-mini-communication-module-with-a-pre-soldered-header 2025-08-06 https://elecena.pl/product/26091762/usb-to-uart-ttl-mini-communication-module-with-a-pre-soldered-header 2025-11-28 https://elecena.pl/product/26091762/usb-to-uart-ttl-mini-communication-module-with-a-pre-soldered-header 2025-11-29