【High Compatibility USB to TTL Converter】 USB 2.0 to TTL UART interface; supports STC ISP and STM32 serial download; compatible with Windows Linux macOS without drivers; 4.5V to 5.5V input range; 3.3V or 5V output level selection via jumper
【Flexible Communication Settings】 50bps to 2Mbps baud rate support; 5-8 data bits, 1/2 stop bits, odd/even/no parity; adjustable for custom non-standard rates; low power consumption; suitable for embedded development and microcontroller programming
【Robust Industrial Design】 -40°C to 85°C operating temperature; built-in ESD protection; four-layer PCB with M3 mounting holes; 30mm x 18mm compact size; reliable performance in harsh Settings
【Easy Integration with Development Boards】 Supports for Arduino for Raspberry Pi and STM32 boards; DTR/RTS auto reset control; TXD/RXD cross connection for STC microcontroller burning; anti-collision design prevents short circuits during parallel connections
【User-Friendly Setup and Operation】 Plug-and-play functionality; no need for external power supply for most applications; 2000mAh battery support for portable use; 1.8µA sleep mode for energy efficiency; clear pinout diagram included for easy wiring

Product Parameters ( )

Interface Protocol: USB 2.0 to TTL UART (compatible with USB 1.1/2.0 full speed, 12Mbps) .

Input Voltage: 4.5V-5.5V DC

Output Level: 3.3V/5V TTL (jumper selectable, compatible with 3.3V/5V systems).

Communication Rate: 50bps-2Mbps (supports non-standard baud rates) .

Data Format: 5-8 data bits, 1/2 stop bits, odd/even/no parity.

Operating Temperature: -40°C to 85°C (Reliable).

GPIO Expansion: 4 configurable I/O (push-pull/open-drain output).

Dimensions: 30mm x 18mm (4-layer PCB with M3 mounting holes).

🔧 Key Pin Functions ( )

VCC: Power output (3.3V/5V jumper selectable). Max load current ≤100mA. Decoupling capacitor ≥10μF.

GND: System ground. Ground impedance ≤0.05Ω.

TXD: Serial data transmit. Connect to target device RXD. Output high level ≥2.4V (5V TTL).

RXD: Serial data receive. Connect to target device TXD. Input high level threshold ≥2.0V (5V TTL).

DTR/RTS: Flow control signals for auto-reset (e.g., STC microcontroller cold start) .

⚙️ Key Features

Plug-and-Play: Supports STC microcontroller ISP download (e.g., STC89C52) and STM32 debugging. Baud rate adaptive .

Driver-Free: Auto-recognized on Windows/Linux/macOS (Windows XP/7/8/10/11) .

Level Shifting: 3.3V/5V jumper for for Arduino/for Raspberry Pi compatibility.

Industrial Reliability: Built-in power regulation and ESD protection. Suitable for embedded systems and industrial control .

❓ FAQ

Q1: Device not recognized?

A: Install official CH340 driver (disable driver signature enforcement). Try another USB cable .

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