12-STAGE BINARY RIPPLE COUNTER
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MC74AC4040 12ĆStage Binary Ripple Counter
The MC74AC4040 consists of 12 master-slave flip-flops. Th...
Description
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MC74AC4040 12ĆStage Binary Ripple Counter
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. 140 MHz Typ. Clock Outputs Source/Sink 24 mA Operating Voltage Range: 2.0 to 6.0 V High Noise Immunity
VCC 16 Q11 15 Q10 14 Q8 13 Q9 12 RESET CLK 11 10 Q1 9
12-STAGE BINARY RIPPLE COUNTER
N SUFFIX CASE 648-08 PLASTIC
1 Q12
2 Q6
3 Q5
4 Q7
5 Q4
6 Q3
7 Q2
8 GND
D SUFFIX CASE 751B-05 PLASTIC
FUNCTION TABLE
Clock Reset L L X H Output State No Change Advance to next state All Outputs are low CLOCK
LOGIC DIAGRAM
9 7 6 5 10 3 2 4 13 12 14 15 1 11 Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12
RESET
PIN 16 = VCC PIN 8 = GND
FACT DATA
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MC74AC4040
MAXIMUM RATINGS*
Symbol VCC Vin Vout Iin Iout ICC PD Parameter DC Supply Voltage (Referenced to GND) DC Input Voltage (Referenced to GND) DC Output Voltage (Referenced to GND) DC Input Current, per Pin DC Output Current, per Pin DC VCC or GND Current per Output Pin Power Dissipation in Still Air Plastic** SOI...
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