In summary, the expansion of Allegro’s microstepping motor driver line to include four new devices that require fewer external components and utilize a simple STEP and Direction interface. Allegro’s A4982/A4984/A4985 and A4988 devices are complete microstepping motor drivers with a built-in translator for easy operation and overcurrent protection to reduce the rework cost in both manufacturing and normal operations. They are targeted at the office automation market. These latest devices are designed to operate bipolar stepper motors in full-, half-, quarter-, eighth- and sixteenth step modes, with an output drive capacity of up to 35V and ±2A. They include a fixed off-time current regulator which has the ability to operate in slow or mixed decay modes. The translator is the key to the easy implementation of the devices. Simply inputting one pulse on the STEP input drives the motor one microstep. There are no phase sequence tables, high frequency control lines, or complex interfaces to program. The interface is an ideal fit for applications where a complex microprocessor is unavailable or is overburdened.