What is it? This is 4-channel digital isolator breakout board, based on the SI8641 IC from Skyworks. It provides breakout pins for the 4 isolated channels, plus enable pins (so it can be externally disabled by a logic signal if required), as well as solder jumper pads to enable or disable the module by default.

The SI8641 IC from Skyworks can be used with a VCC range of 2.5 to 5.5 Volts (making it perfect for both 3.3V and 5V systems). It is very robust with an isolation voltage of 2.5kV and can operating at up to 100Mbps. The IC features 3/1 configuration (please see IC block picture).

This is a great module for those looking to isolate grounds or communicate between high and low voltage zones. This makes an excellent isolator for SPI or UART communication.

NOTE: The module will come up with SB1 and SB3 soldered, as such both the input and output sides are enabled. If you wish to use external control, please remove the solder from these solder bridges.

All components used are able to be used with an operating temperature range of -40 degC to + 85 degC.

The header pins will need to be soldered by the customer.

Why did you make it? I didn't see any board on the market that has the features of the Si8641 with reliable, high quality parts. Also, the dual row headers help in development because you can probe one pin while the other one can be connected to a signal.

What makes it special? We use parts from reputable distributors and resellers. Board is built in the USA!