The daisy chain communication is created using differential signaling to minimize Electro-Magnetic Susceptibility (EMS) and Bulk Current Injection (BCI) immunity. The differential communication transmits true and complement data on the COM*P and COM*N pins, respectively. In a multiple device stack, there are configurations where the devices are physically located on the same board or located in entirely separate packs connected with twisted-pair wiring.

The device supports the use of transformers or capacitors to electrically isolate the signals between devices in the stack. For applications that have multiple devices on the same PCB, a single level-shifting capacitor is connected between the COMH/L pins of the devices. For extremely noisy environments, additional filtering may be necessary. For devices that are separated by cabling, additional isolation components are used. See Section 10 for specific details on selecting components.