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Small USB-C dongle with jumper pins and three status LEDs

LORDWORLD

LORDWORLD USB-C to TTL CH340G 3.3V 5V Adapter

SKU CH-PTK2-89R03

USB-C to TTL adapter with CH340G chip, jumper-selectable 3.3V or 5V levels, and three status LEDs for power, TX, and RX

  • Selectable 3.3 V or 5 V logic via jumper
  • Three status LEDs show power, TX and RX activity
  • CH340G chip avoids driver conflicts on STC devices
  • USB 2.0 Type-C male plug for modern ports
  • Supports Windows 98 through Win8 32/64-bit

USB-C to TTL adapter for STC microcontrollers

This LORDWORLD module converts a USB-C port to a TTL serial interface using the CH340G chip. It targets engineers and hobbyists who program STC microcontrollers, upgrade firmware on devices such as routers or hard drives, or need a stable replacement for legacy PL-2303 based converters. The USB 2.0 Type-C male connector plugs directly into modern laptops without extra cables.

Voltage selection by onboard jumper

A physical jumper on the board switches the TTL logic level between 3.3 V and 5 V to match the target device. This single setting decides whether the adapter is safe for a given microcontroller; choosing the wrong voltage can damage the chip. No software configuration changes the logic level, so the jumper position must be verified before every connection.

Three status LEDs show power and data flow

PWR, TXD and RXD indicators let you confirm link activity without an oscilloscope or logic analyser. The driver supports 32-bit and 64-bit Windows from 98 through 8, covering legacy and current development machines. The CH340G is the STC official download chip, eliminating driver mismatches that plague PL-2303 solutions, but the adapter offers no isolation or buffering for industrial voltage spikes.

Highlights

  • Selectable 3.3 V or 5 V logic via jumper
  • Three status LEDs show power, TX and RX activity
  • CH340G chip avoids driver conflicts on STC devices
  • USB 2.0 Type-C male plug for modern ports
  • Supports Windows 98 through Win8 32/64-bit

Specifications

BrandLORDWORLD

Questions about this item

What does the CH340G chip actually do when I plug this into a PC?

The CH340G acts as a USB-to-UART bridge so the computer sees a virtual COM port and can talk to 3.3 V or 5 V TTL devices such as STC microcontrollers, routers or hard-drive boards.

Which USB standard does the Type-C connector use and what speed does that limit me to?

The adapter uses USB 2.0, so the serial link is capped at USB 2.0 full-speed bandwidth, which is plenty for typical UART baud rates.

How do I switch between 3.3 V and 5 V logic levels on the board?

A jumper on the module selects either 3.3 V or 5 V TTL output; move the jumper to the desired position before powering the target device.

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