Home Projects Miscellaneous USB to Serial converter using PL2303SA


USB to Serial converter using PL2303SA
author: Alex Sidorenko - obddiagnobddiag.net


This USB to serial (TTL) converter project is easy to build, it is simple and inexpensive. It is based on the PL2303SA USB to USART bridge from Prolific.


The PL2303SA chip is not required an external crystal as the internal clock oscillator is continuously tuning up to USB bus frequency. Having chip in SO-8 packaging does not require special soldering skills to assemble the project. Please note: the TX and RX signal levels are 3.3 Volts.




 PCB Design

PCB top layer


3D PCB rendering


Download Project files (Cadsoft Eagle)

Download PCB Gerber files


120x90 spot



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