NP series : Stepper motor driver chips
The NP series drivers are hybrid IC's with built in driver bridge and chopper current control functions and are designed to drive 2 phase stepper motors. The chips have either full step or half step modes of excitation supported. Clock sequenced inputs are required. NP-7024M and NP-7026M drive unipolar stepper motors.

BCD/BD series : Board level stepper motor drivers
The BCD drivers are constant current type drivers which incorporate our NP series chip for stepper motors. The BD4005U is a constant voltage type driver. The BCD/BD Series drivers are small, easy to interface and use, yet powerful enough to support most applications. The BCD drivers have opto-isolated inputs and outputs.