74HC4020 Datasheet, PDF (6/7 Pages) NXP Semiconductors – 14-stage binary ripple counter

Philips Semiconductors
14-stage binary ripple counter
Product specification
74HC/HCT4020
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
I_CC category: MSI
Note to HCT types
The value of additional quiescent supply current (∆I_CC) for a unit load of 1 is given in the family specifications.
To determine ∆I_CC per input, multiply this value by the unit load coefficient shown in the table below.
INPUT
CP
MR
UNIT LOAD COEFFICIENT
0.85
1.10
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t_r = t_f = 6 ns; C_L = 50 pF
T_amb (°C)
TEST CONDITIONS
SYMBOL
PARAMETER
min.
+25
typ.
74HCT
−40 to +85
max. min. max.
−40 to +125
min. max.
UNIT _VCC
(V)
WAVEFORMS
t_PHL/ t_PLH
t_PHL/ t_PLH
t_PHL
t_THL/ t_TLH
propagation delay
CP to Q₀
propagation delay
Q_n to Q_n+1
propagation delay
MR to Q_n
output transition time
18 36
45
8 15
19
22 45
56
7 15
19
54 ns 4.5 Fig.7
22 ns 4.5 Fig.7
68 ns 4.5 Fig.8
22 ns 4.5 Fig.7
t_W
clock pulse width
20 7
HIGH or LOW
t_W
master reset pulse width 20 8
HIGH
t_rem
removal time
MR to CP
10 2
f_max
maximum clock pulse 25 47
frequency
25
30
25
30
13
15
20
17
ns 4.5 Fig.7
ns 4.5 Fig.8
ns 4.5 Fig.8
MHz 4.5 Fig.7
September 1993
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