PL2303TA USB TO TTL – Easyelecmodule

When we introduced CH340 previously, we have already covered What is a USB to TTL converter?How does USB to TTL work?and What is USB to TTL used for?We will not go into details here (for details, please refer to CH340 USB TO TTL).

Here I would like to recommend another USB TO TTL product – PL2303TA USB TO TTL.

What is PL2303TA USB TO TTL？

PL2303TA USB TO TTL flashing cable is a type of flashing cable with the PL2303TA chip as its core. Through PL2303TA USB TO TTL, serial communication between the USB port of a computer and a microcontroller can be realized. Simply saying, PL2303TA USB TO TTL can convert the signal output from the USB port of a computer into a TTL serial signal that a microcontroller can understand and use. Common microcontrollers include Raspberry Pi boards, Arduino, etc.

What are the application scenarios for PL2303TA USB TO TTL？

PL2303TA USB TO TTL is often used in the editing and development of microcontrollers such as Arduino, Raspberry Pi boards, and ESP32. It can also be used to configure some UART devices on a computer, such as Bluetooth and GPS modules.

Main Performance Parameters Table (with PL2303TA USB TO TTL DATASHEET)

PL2303TA USB TO TTL
Chip	PL2303TA
Power Supply Voltage	Minimum power supply voltage: -0.3V Maximum power supply voltage: 5.5V
Operating Voltage Range	Minimum operating voltage: 3.6V Maximum operating voltage: 5.5V
Operating Current	10mA
Storage Temperature	Minimum temperature: -40°C Maximum temperature: 150°C

We provide Prolific’s data sheet for you to reference: PL2303TA USB TO TTL DATASHEET.

PL2303TA USB TO TTL DATASHEET

PL2303TA USB TO TTL Pinout

Red wire: 5V
Black wire: Ground (GND)
White wire: Receive (RXD)
Green wire: Transmit (TXD)

What is the difference between pl2303 and ftdi?

In terms of basic functions, both pl2303 and ftdi connect microcontrollers with TTL ports to computers via USB, and convert the signals output from the computer’s USB port into TTL serial signals that microcontrollers can understand and use. In terms of drivers, ftdi supports a wider range of drivers, and even Windows can automatically update the drivers. As for pl2303, many users have reported that there may be some problems sometimes. In terms of reliability, ftdi is often more reliable than pl2303, but due to cost factors, ftdi is more expensive than pl2303. If you prioritize reliability, you can choose ftdi; if you prioritize high cost performance, I recommend pl2303.

How to connect PL2303TA USB TO TTL to Arduino？

If you are looking for a way to connect PL2303TA USB TO TTL to Arduino, coming look this. I designed to use a notebook for power supply. Prepare an Arduino board, a PL2303TA USB TO TTL, and 4 male-to-male DuPont wires. First, connect the 5V pin of PL2303TA USB TO TTL to the 5V pin of Arduino. Connect the GND pin of PL2303TA USB TO TTL to the GND pin of Arduino in the same way. Then, connect the transmit (TX) pin of PL2303TA USB TO TTL to the receive (RX) pin of Arduino. Finally, connect the receive (RX) pin of PL2303TA USB TO TTL to the transmit (TX) pin of Arduino, and you’re done!

Attached is a connection example diagram for reference:

pl2303ta windows 11 driver

We have found that many people have doubts about the driver of PL2303TA in Windows, especially in Windows 11.Here I offer you some solutions and provide you with the download link of the driver.
I checked and found that the most frequently occurring issue at present is that the device manager and port display “Please install the corresponding PL2303 driver to support Windows 11 and higher operating systems.”

For this, we can check the chip manufacturer’s website or Prolific’s official website for the latest drivers to download. If your computer is an older version, be sure to install it in compatibility mode. You can also download CheckChipVersion first to check if it is compatible.

We provide the driver download link:

This is the download link for the 1.12 version driver compatible with PL2303TA and Win11:

http://support.dlink.com.au/Download/download.aspx?product=DGS-3630-52TC

FAQS

What is TTL in USB to TTL?

TTL (transistor transistor logic) refers to transistor-transistor logic level, which is widely used in integrated circuit technology.

Are TTL and UART the same？

TTL and UART are not the same. TTL is a type of digital logic, while UART is a communication protocol. UART data transmission is carried out through TTL voltage levels. It can be said that UART includes TTL serial data transmission, but they are essentially different.

Is TTL the same as RS-232?

In essence, both TTL and RS-232 are serial communication standards, but they have significant differences in voltage levels and application scenarios.

	TTL	RS-232
Voltage Level	Logic “0” uses 0V Logic “1” uses 5V or 3.3V	Usually uses +/-12V to represent “0” and “1”
Voltage Used	Positive voltages: 0V, 5V or 3.3V	Negative voltages: +/-12V
Purpose	Often used for short-distance communication	Designed for long-distance serial communication

Table of Contents