Max Load Capacitance with SN74AUP1G17

What do you mean, within specs?

The device will work... the propagation delay will be huge and the slew rate also, the output waveform will be awful. Notice that the device is spec tested for 30 pF max. But eventually it will change state.

I can't provide a schematic, but I have the buffer currently driving low into an analog switch (think multiplexer). The other switch input is pulled high and the control is set to have the high output pass through. The output has a 0.027uF load cap to ground which at this point is fully charged. When the switch control switches to my buffer the load cap tries to discharge instantaneously through the buffer that is driving low. However, the buffer can only sink 2mA. So now this signal which should be low is being pulled high for a brief amount of time.

My thought was to put a 0.1uF a greater cap at the output of the buffer, such that when the load cap discharges, it can fill up the 0.1uF which won't spike as high.

I don't know if that will help, wouldn't it create problems for you when you switch to high again?

I think that it is better to put a series resistor if you want to lower the spike