Prolific Usbtoserial Comm Port Version 333114 Driver May 2026
Overview
Step 2: Uninstall the Current Driver
- Easy installation: The driver is easy to install and configure, making it simple to get up and running quickly.
- Reliable communication: The driver provides reliable communication between the computer and the device, reducing errors and downtime.
- Wide compatibility: The driver's wide compatibility with different operating systems and devices makes it a versatile solution for a range of applications.
- Stable COM port enumeration without random disconnections
- Supports hardware flow control (RTS/CTS) for reliable data transfer
- Baud rates up to 6 Mbps depending on the PL-2303 variant
- Less aggressive counterfeit detection compared to newer drivers (v3.4.x and above)
Plug in your USB-to-serial adapter
– Windows should now use v3.3.3.114.
Prolific USB-to-Serial Comm Port driver version 3.3.3.114 is a critical legacy driver used to bridge serial devices—such as GPS receivers, scanners, and ham radios—to computers via a USB port. While newer drivers exist, version 3.3.3.114 is particularly significant for users of older hardware based on the PL2303 chip Google Groups Key Specifications & Compatibility Release Date: February 25, 2022 (latest repackaging). Operating Systems: prolific usbtoserial comm port version 333114 driver
Security and safety considerations