Description
The CH340G is a widely used USB-to-serial bridge controller that enables seamless communication between a USB-enabled host (like a PC) and serial-based peripherals. It functions as a USB bus converter, capable of transforming USB into serial interfaces (UART), IrDA infrared, or printer interfaces. By emulating a standard serial port on the host operating system, it allows developers to easily upgrade legacy serial devices to USB or add additional serial ports to a system with minimal effort.
Designed for flexibility, the CH340G supports both 5V and 3.3V operating voltages and a wide range of baud rates (50bps to 2Mbps in serial mode). Its hardware full-duplex design and built-in transceiver buffer ensure stable data flow. Housed in an SOIC-16 (SMD) package, it is a cost-effective and space-efficient solution for embedded projects, development boards, and industrial communication modules.
Note: Product images are for reference only. The actual product may vary in appearance or manufacturer marking depending on stock availability.
Features
- Full-speed USB 2.0 device interface (requires minimal external components like crystal/capacitance)
- Emulates standard serial interface for broad software compatibility
- Hardware full-duplex serial interface with transceiver buffers
- Supports baud rates from 50bps up to 2Mbps
- Supports common MODEM signals: RTS, DTR, DCD, RI, DSR, and CTS
- Supports IrDA (SIR) infrared communication (2400bps to 115200bps)
- Compatible with RS232, RS485, and RS422 when combined with external level converters
- Software compatible with CH341 drivers
- Wide operating temperature range (-40°C to +85°C)
Benefits
- Highly cost-effective and widely used in development boards (e.g., Arduino-compatible designs)
- Simple implementation with minimal external hardware
- Broad OS support through standard virtual COM port drivers
- Versatile conversion options (Serial, IR, Printer)
- Reliable operation across standard industrial temperature ranges
Applications
- USB-to-Serial TTL Adapters
- Legacy Serial Peripheral Upgrades
- Embedded System Debugging/Programming
- Infrared (IrDA) Communication Adapters
- Computer Peripheral Interfaces
- Industrial Data Loggers and Communication Bridges
Package Includes
- 1 x CH340G USB to Serial TTL-RS232 Converter IC (SOIC-16)
Specifications
| Parameter | Specification |
|---|---|
| Product Name | CH340G |
| Device Type | USB to Serial Interface |
| Supply Voltage | -0.5V to 6.0V |
| Operating Temperature | -40°C to +85°C |
| Package / Case | SOIC-16 |
| Mounting Type | Surface Mount (SMD) |
| Dimensions | 10 x 4 x 1.6 mm |
| Shipping Weight | 0.008 kg |
