I want to put a capacitor to output. Is this OK?

If a large capacity is connected to a CMOS, a large charge and discharge current occurs for a long time, which may result in malfunction or destruction. In addition, because the output is short circuited for a long time, it may lead to meltdown of the internal wire. Furthermore, there may be current in the output parasitic diode when power-off time is quick, so avoid directly driving a large load capacity.

It is recommended that the capacitive load of the capacitor that is connected to the output pin is limited to 500 pF. If the capacity exceeds that, limit the charge and discharge current through a resistance as shown in Figure 1.

[Figure 1: How to connect output to a large capacitor]

As for products that do not have input tolerant function such as TC4000 and TC74HC/AC series, there also may be current in the input protective diode when power-off time is quick, so avoid directly driving a large load capacity.

It is recommended that the capacitive load of the capacitor that is connected to the input pin is limited to 500 pF. If the capacity exceeds that, connect through a resistance as shown in Figure 2.

[Figure 2: How to connect input to a large capacitor
TCTC4000 and TC74HC/AC series]