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12-Stage Binary Ripple Counter
MC74AC4040
The MC74AC4040 consists of 12 master-slave flip-flops. The output of each flip-flop feeds the next and the frequency at each output is half that of the preceding one. The state of the counter advances on the negative-going edge of the Clock input. Reset is asynchronous and active-high.
State changes of the Q outputs do not occur simultaneously because of internal ripple delays. Therefore, decoded output signals are subject to decoding spikes and may have to be gated with the Clock of the MC74AC4040 for some designs.
Features
• 140 MHz Typ. Clock • Outputs Source/Sink 24 mA • Operating Voltage Range: 2.0 to 6.0 V • High Noise Immunity • These are Pb−Free Devices
VCC Q11 Q10 Q8 16 15 14 13
Q9 RESET CLK Q1 12 11 10 9
DATA SHEET www.onsemi.
MC74AC4040 Datasheet
