參數(shù)資料
型號: 74HCT390
廠商: NXP Semiconductors N.V.
元件分類: 通用總線功能
英文描述: Dual decade ripple counter(雙十進(jìn)制紋波計(jì)數(shù)器)
中文描述: 雙十年紋波計(jì)數(shù)器(雙十進(jìn)制紋波計(jì)數(shù)器)
文件頁數(shù): 5/7頁
文件大小: 49K
代理商: 74HCT390
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
= 50 pF
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
50
18
14
74
27
22
50
18
14
52
19
15
19
7
6
19
7
6
28
10
8
22
8
6
20
60
71
145
29
25
155
31
26
210
42
36
155
31
26
165
33
28
75
15
13
180
36
31
195
39
33
265
53
45
195
39
33
205
41
35
95
19
16
220
44
38
235
47
40
315
63
54
235
47
40
250
50
43
110
22
19
ns
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
Fig.6
t
PHL
/ t
PLH
propagation delay
nCP
1
to nQ
1
ns
Fig.6
t
PHL
/ t
PLH
propagation delay
nCP
1
to nQ
2
ns
Fig.6
t
PHL
/ t
PLH
propagation delay
nCP
1
to nQ
3
ns
Fig.6
t
PHL
propagation delay
nMR to nQ
n
ns
Fig.7
t
THL
/ t
TLH
output transition time
ns
Fig.6
t
W
clock pulse width
nCP
0
, nCP
1
80
16
14
80
17
14
75
15
13
6.0
30
35
100
20
17
105
21
18
95
19
16
4.8
24
28
120
24
20
130
26
22
110
22
19
4.0
20
24
ns
Fig.6
t
W
master reset pulse width
HIGH
ns
Fig.7
t
rem
removal time
nMR to nCP
n
ns
Fig.7
f
max
maximum clock pulse
frequency
nCP
0
, nCP
1
MHz
Fig.6
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