The CH340C USB Type-C to TTL Serial Converter Breakout Board is a compact USB-to-UART communication module designed to convert USB Type-C data into standard TTL serial signals for programming, debugging, and serial communication with microcontrollers and embedded systems. Based on the CH340C USB-to-Serial IC, the module provides a reliable interface between a computer and UART-enabled devices, making it ideal for Arduino, ESP32, ESP8266, STM32, Raspberry Pi Pico, AVR, PIC, and numerous other development platforms.

The CH340C integrates an internal crystal oscillator, eliminating the need for an external crystal used in earlier CH340G-based designs. This reduces component count, improves reliability, and allows for a more compact breakout board. The module converts USB communication into standard UART TX and RX signals while supporting full-duplex asynchronous serial communication. It is commonly used for firmware uploading, serial debugging, bootloader programming, data logging, and communication with GPS, GSM, Bluetooth, LoRa, and other UART-based modules.

The breakout board typically provides clearly labeled TXD, RXD, GND, VCC, 3.3V, 5V, DTR, and CTS pins for easy interfacing with development boards and embedded systems. Many versions feature selectable 3.3V and 5V logic levels, onboard power and data activity LEDs, and a reversible USB Type-C connector for improved convenience and compatibility with modern laptops and computers.

Designed for reliable and high-speed serial communication, the CH340C USB Type-C to TTL Serial Converter Breakout Board offers excellent compatibility with Windows, Linux, and macOS operating systems. Its compact size, low power consumption, modern USB Type-C interface, and stable performance make it an essential development tool for students, hobbyists, engineers, makers, and embedded system developers.

Key Features

• Based on the CH340C USB-to-UART bridge IC
• USB Type-C interface for modern devices
• Internal crystal oscillator (no external crystal required)
• Converts USB communication to TTL serial UART
• Full-duplex asynchronous serial communication
• Supports USB 2.0 Full-Speed communication
• Compact breakout board design
• Reliable and stable serial communication
• High-speed UART data transfer
• Suitable for programming microcontrollers
• Ideal for firmware uploading and serial debugging
• Supports GPS, GSM, Bluetooth, and LoRa modules
• Standard TXD and RXD serial interface
• Provides GND, VCC, DTR, and CTS pins
• Selectable 3.3V or 5V logic level on most versions
• Onboard Power, TX, and RX status LEDs
• Driver support for Windows, Linux, and macOS
• Breadboard-friendly pin spacing
• Low power consumption
• Compact and lightweight PCB
• Ideal for DIY electronics, embedded development, and IoT applications