capacitor 100nk
Normaly, for decoupling capacitor in digital purposes, capacitors you can't are electrolitics, because it have a high inductando, so for high frecuencies over 1Mhz, electrolitics capacitors lose the capacity.
Use of ceramic or polyesters capacitors are good for decoupling.
In picture,it is apparently a NP0 ceramic capacitor, it means is a temperature compensated capacitor, is good for your need.
But it's inserted capacitor, so very high frecuencies will be not decoupled, cause the inductance in pins.