Ordering information All types operate from -40 ??C to +85 ??C. Type number Package Name Description Version HEF4526BP HEF4526BP DIP16 DIP16 plastic dual in-line package; 16 leads (300 mil) SOT38-4 HEF4526BT HEF4526BT SO16 plastic small outline package; 16 leads; body width 3.9 mm SOT109-1 5.