Prolific Technology Inc. is a leading manufacturer of specialty I/O and USB-to-serial bridge controllers, most known for the widely used PL2303 chips.
Prolific Technology Inc. is a leading semiconductor company specializing in the design and manufacture of specialty I/O, mixed-mode, and green energy ICs. They are recognized globally for their PL23XX family of USB-to-serial bridge controllers.
Because Prolific supplies microchips directly to peripheral manufacturers, they do not produce or provide direct support for end-user retail cables or adapters. However, their critical driver softwareāsuch as the PL2303 Windows and Mac OS driversāenables seamless connectivity for millions of legacy serial devices via modern USB ports on PCs.
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You can download the latest Windows, Mac, and Linux driver installers directly from the Support webpage of the official Prolific Technology website.
This error typically indicates that your cable or device relies on a counterfeit controller chip. Since Prolific does not manufacture end-user products, you will need to contact the retailer or manufacturer of your cable for a replacement or support.
No, Prolific has discontinued the PL2303TA and PL2303TB chips (End of Life phase). They will not receive driver updates for Windows 11 or later operating systems.
No, Prolific designs and sells the IC chips utilized by peripheral manufacturers. They do not sell retail products or offer direct support for end-user devices. For hardware issues, you should contact the specific brand that sold you the device.