NX3225SA Crystal Units NDK NX3225SA Crystal Units are designed for automotive, mobile communication, and office automation (OA)/audiovisual (AV) applications. These crystal units offer excellent environmental characteristics including heat, vibration, and shock resistance for automotive applications. The mobile communications and OA/AV variants are ideal for Bluetooth, Wi-Fi, smartphones, and tablet PCs. The NX3225SA crystal units come in a compact and thin 3.2mm x 2.5mm x 0.55mm package.