The maximum voltage that can be applied to any source input pin is +60 V or –60 V, regardless of supply voltage. This allows the device to handle typical voltage fault condition in industrial applications. Caution: the device is rated to handle a maximum stress of 85 V across different pins, such as the following:

1. Between source pins and supply rails: 85 V

   For example, if the device is powered by V_DD supply of 25 V, then the maximum negative signal level on any source pin is –60 V to maintain the 60 V maximum rating on any source pin. If the device is powered by V_DD supply of 40 V, then the maximum negative signal level on any source pin is reduced to –45 V to maintain the 85 V maximum rating across the source pin and the supply.

2. Between source pins and the drain pin: 85 V

   For example, if channel S1A is ON and the voltage on S1A pin is 40 V, then the drain voltage D1 is also 40 V. In this case, the maximum negative voltage allowed on S1B is –45 V to maintain the 85 V maximum rating across the source pin and the drain pin.