High voltage protection for UART

I need to create a high voltage protection module (up to 50 V constant voltage) for UART line with speed of 56.7 kB/s connecting an STM32 with external devices. I was considering darlington arrays, but ones with max input voltage of 50 V are quite expensive.
Any ideas?


simulate this circuit – Schematic created using CircuitLab

Leave a Reply

Your email address will not be published. Required fields are marked *