• Original CH343G: Stable, high‑speed USB‑to‑UART conversion.
• Multi‑Protection: TVS diodes for ESD; self‑resetting fuse for overcurrent/short‑circuit safety.
• Select 3.3 V / 5 V: Hardware switch adapts to a wide range of TTL devices.
• High Baud Rate: Supports up to 6 Mbps serial throughput.
• On‑board LDO: Provides stable power to attached peripherals.
• Plug‑and‑Play: Standard USB‑A connector, automatic driver recognition on Windows, Linux, and macOS.
• Compact & Durable: Industrial build quality for harsh environments.

• Converter Chip: CH343G (original)
• USB Interface: USB‑A (USB 2.0 compatible)
• TTL Header: 6‑pin (TXD, RXD, VCC, GND, etc.)
• Baud Rate: Up to 6 Mbps
• Operating Voltage: 5 V from USB
• TTL Logic Levels: 3.3 V / 5 V selectable
• Protection: TVS ESD diode, self‑recovery fuse
• Indicator LEDs: PWR, TXD, RXD
• Dimensions: See Waveshare product page for outline drawing

• Reliability: CH343G ensures error‑free communication for mission‑critical tasks.
• Device Safety: Multi‑protection minimizes damage from ESD or shorts.
• Flexibility: Works with 3.3 V or 5 V targets and a wide baud‑rate range.
• Fast Deployment: Drivers available for major OSes; plug‑and‑play setup.
• Visual Debugging: PWR/TX/RX LEDs give instant communication feedback.
• Industrial‑Grade: Built to withstand demanding field and lab conditions.

• Embedded firmware flashing and console debugging (MCUs, SBCs).
• Industrial automation: PLC or sensor serial interfacing.
• Network gear maintenance: router/switch/STB console access.
• GPS or telemetry module data acquisition.
• Smart‑home & IoT device configuration.
• Legacy equipment USB‑to‑TTL bridging.

• Operating Systems: Windows 7/8/10/11, mainstream Linux distributions, macOS.
• USB Ports: USB 1.1 / 2.0 / 3.0 hosts.
• TTL Targets: Any 3.3 V or 5 V UART device (MCUs, sensors, SBCs, etc.).
• Power: Draws directly from USB host (no external supply needed).

• PWR LED: Solid when USB power is present.
• TXD LED: Flashes while transmitting data to the TTL device.
• RXD LED: Flashes while receiving data from the TTL device.

Full datasheet, drivers, and mechanical drawings:
Official Waveshare Product Page