Minimum operating voltage    8.2 V Maximum operating voltage    45 V Continuous current per phase    1.5 A Maximum current per phase    2.2 A Minimum logic voltage    2.5 V Maximum logic voltage    5.25 V Microstep resolution    full, 1/2, 1/4, 1/8, 1/16 and 1/32 Reverse voltage protection?    No Dimensions    15.5 × 20.5 mm (0.6″ × 0.8″)