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Small bare circuit board with USB-C port and pin headers, green finish

Fervit

Fervit USB-C Female to TTL Adapter CH340G 3.3V 5V Without Housing

SKU CH-HYCM-S3GQ2

A USB-C female to TTL adapter with CH340G chip, selectable 3.3V or 5V logic, and power, TX, RX status LEDs for microcontroller programming

  • Reliable STC microcontroller flashing with official CH340G chip
  • Instant status checks via built-in PWR TXD RXD LEDs
  • Broad legacy OS support from Windows 98 through Win8 64-bit
  • Selectable 3.3V or 5V TTL levels using onboard jumper
  • Drop-in PL-2303 replacement avoids driver mismatch problems

USB-C Female to TTL Adapter CH340G

This adapter uses a CH340G chip to convert a USB-C connection into a TTL serial interface for microcontroller programming and debugging. It is designed for engineers and hobbyists working with STC microcontrollers who need a stable USB-to-serial link without driver conflicts.

TTL Voltage Selection via Jumper

The board provides selectable 3.3 V or 5 V TTL logic levels through an onboard jumper, allowing it to match the target device voltage. Three status LEDs indicate power, transmit and receive activity so connection health can be verified without external instruments.

Windows Legacy Through Modern OS Support

Drivers are available for Windows 98 through Win8 in both 32-bit and 64-bit versions, covering a wide range of legacy and current development machines. It does not serve users who require isolated interfaces, higher baud-rate guarantees or ruggedised enclosures for industrial deployment.

Highlights

  • Reliable STC microcontroller flashing with official CH340G chip
  • Instant status checks via built-in PWR TXD RXD LEDs
  • Broad legacy OS support from Windows 98 through Win8 64-bit
  • Selectable 3.3V or 5V TTL levels using onboard jumper
  • Drop-in PL-2303 replacement avoids driver mismatch problems

Specifications

BrandFervit

Questions about this item

Should I choose the 3.3 V or 5 V logic level for my microcontroller?

The board includes a jumper that lets you select either 3.3 V or 5 V TTL levels, so match the jumper to your target device's supply voltage.

What do the three on-board LEDs show when the adapter is running?

Separate PWR, TXD and RXD indicators light up to confirm power, data transmitted and data received without needing extra instruments.

Which Windows versions does the CH340G driver officially support?

The supplied driver works on 32-bit and 64-bit editions of Windows 98, ME, 2000, XP, Server 2003, Vista, Server 2008, 7 and 8.

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