A3966SLB – ALLEGRO

The A3966SLB, manufactured by Allegro MicroSystems, is a bipolar stepper motor driver integrated circuit designed for operation within a supply voltage range of 4.75V to 5.5V. This device, housed in a 16-pin Small Outline Integrated Circuit (SOIC) package, incorporates internal pulse-width modulation (PWM) current control for regulating motor winding current. The A3966SLB features built-in protection circuitry, including thermal shutdown, overcurrent protection, and undervoltage lockout, enhancing system reliability. Logic inputs are compatible with standard TTL and CMOS levels, facilitating interface with microcontrollers and other digital control systems. The device is capable of driving both windings of a bipolar stepper motor in either full-step or half-step modes, selectable via logic inputs. Its operating temperature range is specified within industrial standards, ensuring reliable performance in demanding environments.