there’s often an INT pin – the INT pin is not included in the standard and usually is not required to use any I2C device, but if your IC or breakout exposes the INT pin, you should consider ...
The example I2C isolation circuit from [Max’s] paper. The SPI implementation is even simpler. [Max Holliday] found himself in this exact situation, running 69 I2C and SPI devices in a single ...