Protecting unpowered op-amp, or how can I use 12V to switch 3.3V?
If you apply &gt; 10 mA to any input greater than the Schottky diode protection rating of 0.5V outside Vcc,Vee then ensure a current limiting series resistor is used.
&quot; Input signals that may swing more than 0.5 V beyond the supply rails must be
current limited to 10 mA or less&quot;