Hitachi HD74AC4024
The HD74AC4024 is a 4-stage counter. This device is incremented on the falling edge (negative transition) of the input clock, and all its output is reset to a low level by applying a logical high on its reset input.DESCRIPTION
The HD74AC4024 is a 4-stage counter. Feature● Outputs Source/Sink 24 mA Pin Arrangement Clock 1 14 VCC Reset 2 13 NC Q7 3 12 Q1 Q6 4 11 Q2 Q5 5 10 NC Q4 6 7 9 8 Q3 GND NC (Top view) HD74AC4024 Logic Symbol C R Q7 Q1 Q6 Q2 Q5 Q4 Q3 Pin Names Clock Reset Q1 to Q7 Clock Input (Active Falling Edge) Master Reset Input Outputs Function Table Clock L L H H Reset L H L H L H L H H : L : High voltage level Low voltage level : Low-to-High Clock Transition : High-to-Low Clock Transition Outputs State No change All outputs are low No change All outputs are low No change All outputs are low Advance to next state All outputs are low 2 HD74AC4024 Logic Diagram Clock C Q C Q C Q C Q R Reset Q R Q R Q R Q Q1 Q2 Q3 Q4 DC Characteristics (unless otherwise specified) Item Maximum quiescent supply current Maximum quiescent supply current Symbol I CC I CC Max 80 8.0 Unit µA µA Condition VIN = VCC or ground, VCC = 5.5 V, Ta = Worst case VIN = VCC or ground, VCC = 5.5 V, Ta = 25°C AC Characterist...