74HC4020 Datasheet, PDF (5/7 Pages) NXP Semiconductors – 14-stage binary ripple counter

Philips Semiconductors
14-stage binary ripple counter
Product specification
74HC/HCT4020
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
I_CC category: MSI
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t_r = t_f = 6 ns; C_L = 50 pF
T_amb (°C)
TEST CONDITIONS
SYMBOL
PARAMETER
min.
+25
typ.
max.
74HC
−40 to +85
min. max.
−40 to +125
min. max.
UNIT _VCC
(V)
WAVEFORMS
t_PHL/ t_PLH propagation delay
CP to Q₀
t_PHL/ t_PLH propagation delay
Q_n to Q_n+1
39 140
175
210 ns 2.0 Fig.7
14 28
35
42
4.5
11 24
30
36
6.0
22 75
95
110 ns 2.0 Fig.7
8 15
19
22
4.5
6 13
16
19
6.0
t_PHL
propagation delay
MR to Q_n
55 170
215
225 ns 2.0 Fig.8
20 34
43
51
4.5
16 29
37
43
6.0
t_THL/ t_TLH output transition time
t_W
clock pulse width
HIGH or LOW
19 75
7 15
6 13
80 11
16 4
14 3
95
19
16
100
20
17
110 ns
22
19
120
ns
24
20
2.0 Fig.7
4.5
6.0
2.0 Fig.7
4.5
6.0
t_W
master reset pulse width 80 17
HIGH
16 6
14 5
100
120
20
24
17
20
ns 2.0 Fig.8
4.5
6.0
t_rem
removal time
MR to CP
50 6
10 2
92
65
75
13
15
11
13
f_max
maximum clock pulse 6.0 30
4.8
4.0
frequency
30 92
24
20
35 109
28
24
ns 2.0 Fig.8
4.5
6.0
MHz 2.0 Fig.7
4.5
6.0
September 1993
5