CH340G USB to TTL Serial Chip SMD SOP16

• The CH340G is a USB to TTL (Transistor-Transistor Logic) serial converter chip.   
• Essentially, it bridges the gap between a computer's USB port and the serial communication interface used by many microcontrollers (like those in Arduino boards).   
• It allows devices with a UART (Universal Asynchronous Receiver/Transmitter) serial interface to communicate with a computer via USB.
• It comes in an SMD (Surface Mount Device) SOP16 (Small Outline Package with 16 pins) package, making it suitable for compact electronic designs.   

• USB to Serial Conversion: Converts USB signals to TTL-level serial signals and vice versa.   
• USB 2.0 Compatibility: Supports full-speed USB 2.0 communication.  
• Wide Baud Rate Support: Handles a wide range of serial communication speeds.
• Driver Compatibility: Works with various operating systems (Windows, Linux, macOS) with readily available drivers.
• 3.3V and 5V Logic Levels: Supports both 3.3V and 5V logic levels, making it versatile for different microcontroller applications.
• Relatively Low Cost: A budget-friendly solution for USB to serial communication.
• Requires external crystal oscilator: The CH340G typically needs an external crystal oscillator.   

• Arduino Development: Used in many Arduino clone boards for USB communication.   
• Microcontroller Programming: Facilitates communication between a computer and a microcontroller for programming and debugging.   
• Embedded Systems: Allows embedded devices to communicate with a computer via USB.
• USB to Serial Adapters: Forms the core of USB to serial adapter cables and modules.   
• Computer Peripherals: Used in some peripherals to provide serial communication over USB.

DATA SHEET AND USECASE

Key Features:

• USB to UART (TTL) communication
• Supports baud rates from 50bps to 2Mbps
• 5V and 3.3V compatible I/O (internal voltage regulator)
• SOP16 SMD package (for surface-mount applications)
• Built-in USB transceiver, no need for external crystal (except for CH340G variant)
• Drivers available for Windows, Linux, and macOS