The IN pin is a high impedance digital input capable of accepting 3.3-V logic level signals up to 2 MHz. There is an internal Schmitt Trigger comparator which isolates the internal circuitry from any external noise.

If limiting the rise or fall times to the power device is desired, then an external resistance can be added between the output of the driver and the load device, which is generally a power MOSFET gate. The external resistor may also help remove power dissipation from the package.