This circuit is from 1999 documentation. The integrated circuit used is not very common today. Both transistors are used if the motor current is greater than 500 mA.
The maximum current of this circuit is 1.5 A. The circuit has the formulas next to the diagram to...
This circuit was obtained in a 1991 Electronics Handbook. The publication no longer exists, but...
EDN magazine in a 90's issue published this TTL technology debouncer flip flop circuit, in this...