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Small USB-A dongle with CH340G chip, jumper for 3.3V or 5V, three status LEDs

Fervit

Fervit USB 2.0 Type-A to TTL UART CH340G 3.3V 5V adapter

SKU CH-B6T3-WJ5C2

A USB 2.0 to TTL serial adapter with CH340G chip, jumper-selectable 3.3 V or 5 V logic, and PWR, TXD and RXD status LEDs for STC microcontroller programming

  • Jumper-selectable 3.3 V or 5 V logic levels
  • Three status LEDs show power, TX and RX activity
  • CH340G chip avoids driver conflicts on STC microcontrollers
  • Replaces PL-2303 for stable serial programming
  • Supports Windows 98 through Windows 8, 32-bit and 64-bit

USB 2.0 Type-A to TTL UART adapter

The Fervit CH340G module connects a standard USB 2.0 Type-A port to a TTL serial interface. It is built for developers, hobbyists and technicians who need a stable bridge for firmware flashing, MCU debugging or legacy equipment upgrades. The board is new and ready for immediate use.

Suits STC microcontroller workflows.

The jumper-selectable 3.3 V or 5 V TTL output matches the logic level of the target device, and the CH340G chip is the STC official download choice, eliminating PL-2303 driver conflicts on Windows 98 through Win8 32-bit and 64-bit. PWR, TXD and RXD LEDs give instant visual feedback without extra instruments. Users who require true RS-232 voltage swing or support for operating systems beyond those listed should look at a different converter.

CH340G chip with jumper-selectable 3.3 V or 5 V TTL

The single specification that decides fit is the CH340G USB-to-TTL chip combined with the on-board jumper that sets the I/O voltage to either 3.3 V or 5 V. If the target hardware expects TTL levels at one of those voltages and the host runs a supported Windows version, this adapter will work; otherwise a different interface is required.

Highlights

  • Jumper-selectable 3.3 V or 5 V logic levels
  • Three status LEDs show power, TX and RX activity
  • CH340G chip avoids driver conflicts on STC microcontrollers
  • Replaces PL-2303 for stable serial programming
  • Supports Windows 98 through Windows 8, 32-bit and 64-bit

Specifications

BrandFervit

Questions about this item

How much power does the CH340G adapter draw when it runs continuously from a USB 2.0 port?

The adapter is bus-powered from a USB 2.0 Type-A port and uses the CH340G chip with selectable 3.3 V or 5 V TTL levels via jumper.

What must I already have to use this UART module for STC microcontroller programming?

You need a PC with a USB 2.0 Type-A socket running Windows 98 through Win8 32-bit or 64-bit and the CH340G driver from the supplied download link.

Will this CH340G board work alongside my older PL-2303-based programmers without driver conflicts?

The CH340G is the STC officially recommended chip and avoids the driver incompatibility issues that can occur with PL-2303 solutions on different computers.

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