MC74HC4020A
http://onsemi.com
5
AC CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Symbol
Parameter
VCC
V
Guaranteed Limit
Unit
55 to 25°C
≤85°C
≤125°C
fmax
Maximum Clock Frequency (50% Duty Cycle)
(Figures 1 and 4)
2.0
3.0
4.5
6.0
10
15
30
50
9.0
14
28
50
8.0
12
25
40
MHz
tPLH,
tPHL
Maximum Propagation Delay, Clock to Q1*
(Figures 1 and 4)
2.0
3.0
4.5
6.0
96
63
31
25
106
71
36
30
115
88
40
35
ns
tPHL
Maximum Propagation Delay, Reset to Any Q
(Figures 2 and 4)
2.0
3.0
4.5
6.0
65
30
26
72
36
35
32
40
35
ns
tPLH,
tPHL
Maximum Propagation Delay, Qn to Qn+1
(Figures 3 and 4)
2.0
3.0
4.5
6.0
69
40
17
14
80
45
21
15
90
50
28
22
ns
tTLH,
tTHL
Maximum Output Transition Time, Any Output
(Figures 1 and 4)
2.0
3.0
4.5
6.0
75
27
15
13
95
32
19
15
110
36
22
19
ns
Cin
Maximum Input Capacitance
10
pF
* For TA = 25°C and CL = 50 pF, typical propagation delay from Clock to other Q outputs may be calculated with the following equations:
VCC = 2.0 V: tP = [93.7 + 59.3 (n1)] ns
VCC = 4.5 V: tP = [30.25 + 14.6 (n1)] ns
VCC = 3.0 V: tP = [61.5 + 34.4 (n1)] ns
VCC = 6.0 V: tP = [24.4 + 12 (n1)] ns
CPD
Power Dissipation Capacitance (Per Package)*
Typical @ 25°C, VCC = 5.0 V
pF
38