Digital Isolator

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Digital Isolator for FTDI USB-UART

Digital Isolator.JPG

This board is a break out board of a 4 channels Digital Isolator chip from Silicon Labs. The main function of this chip is to isolate 2 circuit which each having their own voltage source, and at the same time help them to communicate.

The special of this board is, it is designed with exact pin out of FTDI USB-UART modules which is very common used. So its usage is very simple and easy.

Beside of using SI8642, I also have the version using ADUM1402. The difference is at the maximum data transfer speed. While SI8642 can reach up to 150Mbps, ADUM1402 can have maximum 90Mbps. But it have no issue when I tested it with my FT230XS USB-UART.

Digital Isolator w FTDI.jpg

USB UART 02.jpg


Here is the schematic of the board.

Digital Isolator Sch.png


Here is the component's datasheet for your reference :

Si864x :
ADUM140x :

Where to buy

If you are interested, this board is offered at marketplaces below :


If you want to know the usage of this little board, check this video below

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