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Introduction

CH343 is a USB bus converter chip, which converts USB to serial port. Supports automatic identification and dynamic adaptation of communication baud rate of 115200bps and below, provides standard MODEM signal, used to expand serial port for computer or upgrade directly from normal serial device or MCU to USB bus.

Features

  • Full speed USB device interface, USB 2.0 compatible.
  • Built-in firmware, emulate standard UART interface, used to upgrade the original serial peripherals or expand additional UART via USB.
  • Original serial applications are totally compatible without any modification in Windows operating systems.
  • Supports free installation OS which built-in CDC driver or multi-functional high-speed VCP vendor driver.
  • Hardware full duplex UART interface, integrated independent transmit-receive buffer, supports communication baud rate varies from 50bps to 6Mbps.
  • Supports automatic identification and dynamic adaptation of common communication baud rate of 115200bps and below.
  • UART supports 5, 6, 7 or 8 data bits, and supports odd, even, space, mark and none parity.
  • Supports common MODEM interface signals RTS, DTR, DCD, RI, DSR and CTS.
  • Supports CTS and RTS hardware automatic flow control.
  • Supports half-duplex, provides sending status TNOW, used for controlling RS485 to transmit-receive switch.
  • Supports RS232 interface, through external voltage conversion chip.
  • Supports 5V and 3.3V power supply voltages.
  • UART interface I/O powered independently, supports 5V, 3.3V, 2. 5 V and 1.8V power supply voltages.
  • Integrated power-on reset, integrated clock, no external crystal required.
  • Built-in EEPROM used to configure the chip of VID, PID, maximum current value, vendor and product information string, etc.
  • Integrated Unique ID (USB Serial Number).
  • RoHS compliant SOP16, ESSOP10 and QFN16 lead-free package.
CH343P USB To TTL/UART High-speed asynchronous serial module
CH343P USB To TTL/UART High-speed asynchronous serial module
CH343P USB To TTL/UART High-speed asynchronous serial module
CH343P USB To TTL/UART High-speed asynchronous serial module
CH343P USB To TTL/UART High-speed asynchronous serial module
CH343P USB To TTL/UART High-speed asynchronous serial module
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Exchange or return policy



Every item comes with a 30-day warranty. However, there are certain conditions that apply:

  1. The customer should not be responsible for any self-inflicted damage, such as incorrect power connections (for example, supplying 5V instead of the required 3.3V for a sensor).

  2. The product must be in perfect condition, without any breakage or damage caused by electricity (e.g., short circuits leading to electrical fires).

  3. The store does not accept product exchanges due to customer misunderstandings, such as purchasing the wrong size for their project or buying something without eventually using it. Customers can inquire about the product details and ensure compatibility before making a purchase by contacting us through our Line account @modulemore during business hours. Please note that there may be delays in response between 12:00 PM and 2:00 PM.

Return Policy: To initiate a product return, customers must provide the original receipt or a copy for quick verification. Returns can be sent to our store address by following these guidelines:

  1. Provide a detailed description of the damaged item(s).
  2. Mention any tests or experiments conducted by the customer.

Please note that the store reserves the right to make the final decision regarding product replacement or refund.

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Last updatedOct 20, 2025

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Arduino compatible board, Iot, ESP32, ESP8266, Nodemcu, Raspberry pi, micro:bit and etc.
Mobile number : 0831710868
E-mail : paheyisoicus@gmail.com
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