Datasheet

December 1990 5
Philips Semiconductors Product specification
Dual decade ripple counter 74HC/HCT390
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
=50pF
SYMBOL PARAMETER
T
amb
(°C)
UNIT
TEST CONDITIONS
74HC
V
CC
(V)
WAVEFORMS
+25 −40 to +85 −40 to +125
min. typ. max. min. max. min. max.
t
PHL
/ t
PLH
propagation delay
nCP
0
to nQ
0
47
17
14
145
29
25
180
36
31
220
44
38
ns 2.0
4.5
6.0
Fig.6
t
PHL
/ t
PLH
propagation delay
nCP
1
to nQ
1
50
18
14
155
31
26
195
39
33
235
47
40
ns 2.0
4.5
6.0
Fig.6
t
PHL
/ t
PLH
propagation delay
nCP
1
to nQ
2
74
27
22
210
42
36
265
53
45
315
63
54
ns 2.0
4.5
6.0
Fig.6
t
PHL
/ t
PLH
propagation delay
nCP
1
to nQ
3
50
18
14
155
31
26
195
39
33
235
47
40
ns 2.0
4.5
6.0
Fig.6
t
PHL
propagation delay
nMR to nQ
n
52
19
15
165
33
28
205
41
35
250
50
43
ns 2.0
4.5
6.0
Fig.7
t
THL
/ t
TLH
output transition time 19
7
6
75
15
13
95
19
16
110
22
19
ns 2.0
4.5
6.0
Fig.6
t
W
clock pulse width
nCP
0
, nCP
1
80
16
14
19
7
6
100
20
17
120
24
20
ns 2.0
4.5
6.0
Fig.6
t
W
master reset pulse width
HIGH
80
17
14
28
10
8
105
21
18
130
26
22
ns 2.0
4.5
6.0
Fig.7
t
rem
removal time
nMR to nCP
n
75
15
13
22
8
6
95
19
16
110
22
19
ns 2.0
4.5
6.0
Fig.7
f
max
maximum clock pulse
frequency
nCP
0
, nCP
1
6.0
30
35
20
60
71
4.8
24
28
4.0
20
24
MHz 2.0
4.5
6.0
Fig.6