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PL2303 USB To UART (TTL) Communication Module Type C Connector
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A USB-to-UART (TTL) communication module based on the PL2303GS chip. Connect it to your PC via USB and communicate with microcontrollers, single-board comput...
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A USB-to-UART (TTL) communication module based on the PL2303GS chip. Connect it to your PC via USB and communicate with microcontrollers, single-board computers, and other TTL-level serial devices. Three LED indicators (TXD, RXD, PWR) provide visual feedback during operation.
The module supports flexible VCCIO configuration via an onboard jumper: output 5 V, 3.3 V, or leave open to accept power from the target board (1.8–5 V).
Key Features
- PL2303GS Chip – Latest version for reliable USB-to-UART conversion
- TTL Level Output – Compatible with 1.8 V, 2.5 V, 3.3 V, and 5 V logic
- Selectable VCCIO – 5 V, 3.3 V, or external power via jumper
- 3 LED Indicators – TXD, RXD, and PWR status
- Windows Compatible – Supports Windows XP / 7 / 8 / 10 / 11
Wiring (Example: Type A with MCU)
- VCCIO → 3.3 V or 5 V (set via onboard jumper)
- GND → GND
- TXD → MCU RX
- RXD → MCU TX
Warning: This module is compatible with TTL level only. Do NOT connect directly to RS-232 circuits — doing so may damage the module.
Package Contents
- 1× PL2303 USB UART Board
- 1× 4-Pin Custom Connector Jumper Wire
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- GND
- GND is the ground or reference connection (0 V) for a circuit. When connecting two devices together, their grounds must be joined so both agree on what counts as a low or high signal.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- RS-232
- RS-232 is an older serial communication standard that uses higher, inverted signal voltages (typically around plus or minus 3 to 15 volts) rather than the low logic levels of modern microcontroller pins. When connecting RS-232 equipment to a microcontroller, you usually need an RS-232 transceiver or level converter rather than wiring it directly, or you risk damaging the pins.
- RX
- RX means receive, usually showing data being received by the board. An RX indicator LED can help with troubleshooting USB or serial communication.
- TX
- TX means transmit, usually showing data being sent from the board. A TX indicator LED can help you see when the board is communicating or uploading code.
- UART
- UART is a simple asynchronous serial interface that sends data over separate transmit and receive wires, usually labelled TX and RX, with both ends set to the same baud rate. It is a common way for microcontrollers and other serial devices to exchange data.
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