The 7Semi CH343 USB-A to UART Board, powered by the CH343G chip, provides fast and reliable USB-to-serial communication at data rates up to 6 Mbps. It supports selectable 3.3V and 5V TTL levels, Windows, macOS, Linux and Android platforms, and includes protection against overcurrent, overvoltage, surges and static discharge. Its plug-and-play design is ideal for connecting microcontrollers, debugging serial devices and expanding UART interfaces.
Key Features:
- High-Speed Data Transfer:
Supports transmission rates from 50bps to 6Mbps, ensuring rapid and stable communication. - Enhanced Protection Circuitry:
Equipped with a resettable fuse, transient voltage suppressor, and IO protection circuit for resistance against overcurrent, voltage spikes, surges, and static electricity. - Adjustable TTL Levels:
Supports 3.3V and 5V TTL level switching, allowing flexible voltage configuration. - USB Type-A Interface:
Features a durable and user-friendly USB-A port with resettable fuse (500mA) and ESD protection for long-term reliability. - Optimized UART Connectivity:
Comes with a 6-pin right-angle header, providing easy and secure connections for diverse applications. - Automatic Baud-Rate Adaptation: Automatically detects and adapts to communication baud rates up to 115200 bps.
- Hardware Flow Control: Supports RTS and CTS signals through dedicated exposed pins for reliable UART communication.

- Category of product:
- USB to UART TTL Converter
- USB Type:
- USB Type A
- Dimension (L x B x H):
- 38mm x 18mm x 11.96mm
- Operating Temperature:
- -40 to +85 °C
- _3d_glb:
- https://7semi.com/content/3d-files/dfx_step/10268.glb
- Common Baud rates supported:
- 9600, 19200, 38400, 57600 and 115200 bps
- Operational voltage:
- 5V DC via USB type A