74HC390 Ver la hoja de datos (PDF) - Philips Electronics
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74HC390 Datasheet PDF : 7 Pages
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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
ICC category: MSI
Note to HCT types
The value of additional quiescent supply current (∆ICC) for a unit load of 1 is given in the family specifications.
To determine ∆ICC 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; tr = tf = 6 ns; CL = 50 pF
SYMBOL
PARAMETER
tPHL/ tPLH
tPHL/ tPLH
tPHL/ tPLH
tPHL/ tPLH
tPHL
tTHL/ tTLH
propagation delay
nCP0 to nQ0
propagation delay
nCP1 to nQ1
propagation delay
nCP1 to nQ2
propagation delay
nCP1 to nQ3
propagation delay
nMR to nQn
output transition time
Tamb (°C)
TEST CONDITIONS
74HCT
+25
−40 to +85
−40 to +125
UNIT
VCC
(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
tW
clock pulse width
nCP0, nCP1
18 8
23
27
tW
master reset pulse width 17 10
21
26
HIGH
trem
removal time
nMR to nCPn
15 8
19
22
fmax
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
6
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