na2121NA2121 Datasheet. 351Kb24P. Part #: ENA2121. Manufacturer: Sanyo Semicon Device. Description: PWM Current Control Hh-efficient Stepping Motor Driver. 1 Results.NA2121-20. NA2121-21. Dimensions (mm) 340×256×54. Hole size (mm) 330×246. Display size. 12.1(Length: width = 4:3) Weht (g) 2160. Working temperature. 0℃~55℃(No freezing)