Found 6 alternatives for LB11983-E by Rochester Electronics, LLC. Pmic Motor Drivers Controllers — 20-DIP (0.300", 7.62mm).
IC MOTOR DRIVER 10V-36V 20DIP
STEPPER MOTOR CONTROLLER
STEPPER MOTOR CONTROLLER
IC MTR DRV BIPLR 8-52V 20-PWRDIP
IC MOTOR DRIVER BLDC 28V 20DIP
IC MOTOR DRIVER BIPLR 20-PWRDIP