Crystal unit is a passive component using piezoelectrical effect of the crystal. By applying the voltage, transformation occurs in the crystal and it oscillates frequency of high-stability with the natural resonant frequency of vibration.A small surface-mount type crystal unit, especially suited for small-sizing requirements.Compact and thin. (3.2´2.5´0.75 mm typ.)Excellent environmental characteristics, including heat and shock resistance.Excellent electrical performance for OA (office automation) and AV (audiovisual) applications.