MC74AC4040 Datasheet, PDF (1/5 Pages) Motorola, Inc – 12-STAGE BINARY RIPPLE COUNTER

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 Q11 Q10 Q8 Q9 RESET CLK Q1
16 15 14 13 12 11 10 9
12-STAGE
BINARY RIPPLE
COUNTER
N SUFFIX
CASE 648-08
PLASTIC
12345678
Q12 Q6 Q5 Q7 Q4 Q3 Q2 GND
FUNCTION TABLE
Clock Reset
L
L
X
H
Output State
No Change
Advance to next state
All Outputs are low
D SUFFIX
CASE 751B-05
PLASTIC
LOGIC DIAGRAM
10
CLOCK
11
RESET
PIN 16 = VCC
PIN 8 = GND
9
Q1
7
Q2
6
Q3
5
Q4
3
Q5
2
Q6
4
Q7
13
Q8
12
Q9
14
Q10
15
Q11
1
Q12
FACT DATA
5-1