The MC3479 is designed to drive a two–phase stepper motor in the bipolar mode. The circuit consists of four input sections, a logic decoding/sequencing section, two driver–stages for the motor coils, and an output to indicate the Phase Adrive state.

•Single Supply Operation: 7.2 to 16.5 V
•350 mA/Coil Drive Capability
•Clamp Diodes Provided for Back–EMF Suppression
•Selectable CW/CCW and Full/Half Step Operation
•Selectable High/Low Output Impedance (Half Step Mode)
•TTL/CMOS Compatible Inputs
•Input Hysteresis: 400 mV Minimum
•Phase Logic Can Be Initialized to Phase A
•Phase AOutput Drive State Indication (Open–Collector)