CH340C USB to Serial Converter Chip – USB to UART Bridge IC for Microcontroller Communication
The CH340C is a compact and efficient USB to UART (serial) bridge chip that enables reliable data transfer between USB ports and microcontroller serial interfaces. A variant of the popular CH340G, the CH340C eliminates the need for an external crystal oscillator, making it ideal for compact PCB designs and space-constrained embedded projects.
 
Key Features:
USB to UART Functionality
Converts USB signals to TTL serial (TX/RX) for easy connection to microcontrollers and serial devices.
Crystal-Less Design
Built-in oscillator eliminates the need for an external crystal, reducing component count and PCB space.
Full-Speed USB 2.0 Support
Operates at up to 12 Mbps, providing fast and stable data transmission.
High Compatibility
Supports major operating systems: Windows, Linux, and macOS. Works with Arduino IDE, Putty, and more.
Compact SOP-16 Package
Ideal for SMD circuit boards in embedded and USB-powered projects.
Low Power Operation
Suitable for battery-powered and low-voltage microcontroller systems.
 
Applications:
USB interface for Arduino-compatible boards
USB-to-TTL modules for ESP8266, ESP32, STM32
Serial communication in embedded systems
USB debugging and programming tools
Custom PCB designs requiring USB UART
 
Package Includes:
1 × CH340C USB to Serial Interface Chip 
 
Specifications:
Model: CH340C
Function: USB to UART bridge
Data Rate: Up to 2 Mbps
USB Standard: USB 2.0 full speed
Voltage: 3.3V to 5V compatible
Package Type: SOP-16 (SMD)
Crystal Required: No (internal oscillator)
Driver Support: Windows, Linux, macOS
 
Dimensions:
Length: 10 mm
Width: 4 mm
Pin Pitch: 1.27 mm
 
Weight: 0.5 g
 
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