/ordering information The ?AHC123A devices are dual retriggerable monostable Multivibrators
designed for 2-V to 5.5-V VCC operation. These edge-triggered Multivibrators
feature output pulse-duration control by three methods. In the first method, the A input is low, and the B input goes high. In the second method, the B input is high, and the A input goes low. In the third method, the A input is low, the B input is high, and the clear (CLR) input goes high.