74HC390 Datasheet, PDF (6/7 Pages) NXP Semiconductors – Dual decade ripple counter

Philips Semiconductors
Dual decade ripple counter
Product specification
74HC/HCT390
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
nCP₀
nCP₁, nMR
UNIT LOAD COEFFICIENT
0.45
0.60
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t_r = t_f = 6 ns; C_L = 50 pF
SYMBOL
PARAMETER
t_PHL/ t_PLH
t_PHL/ t_PLH
t_PHL/ t_PLH
t_PHL/ t_PLH
t_PHL
t_THL/ t_TLH
propagation delay
nCP₀ to nQ₀
propagation delay
nCP₁ to nQ₁
propagation delay
nCP₁ to nQ₂
propagation delay
nCP₁ to nQ₃
propagation delay
nMR to nQ_n
output transition time
T_amb (°C)
TEST CONDITIONS
74HCT
+25
−40 to +85
−40 to +125
UNIT
V_CC
(V)
WAVEFORMS
min. typ. max. min. max. min. max.
21 34
43
51 ns 4.5 Fig.6
22 38
48
57 ns 4.5 Fig.6
30 51
64
77 ns 4.5 Fig.6
22 38
48
57 ns 4.5 Fig.6
21 36
45
54 ns 4.5 Fig.7
7 15
19
22 ns 4.5 Fig.6
t_W
clock pulse width
nCP₀, nCP₁
18 8
23
27
t_W
master reset pulse width 17 10
21
26
HIGH
t_rem
removal time
nMR to nCP_n
15 8
19
22
f_max
maximum clock pulse
27 55
22
18
frequency
nCP₀, nCP₁
ns 4.5 Fig.6
ns 4.5 Fig.7
ns 4.5 Fig.7
MHz 4.5 Fig.6
December 1990
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