參數(shù)資料
型號(hào): 74HCT4020
廠商: NXP Semiconductors N.V.
元件分類: 通用總線功能
英文描述: 14-stage binary ripple counter(14級(jí)二進(jìn)制紋波計(jì)數(shù)器)
中文描述: 14位的二進(jìn)制紋波計(jì)數(shù)器(14級(jí)二進(jìn)制紋波計(jì)數(shù)器)
文件頁數(shù): 5/7頁
文件大?。?/td> 49K
代理商: 74HCT4020
September 1993
5
Philips Semiconductors
Product specification
14-stage binary ripple counter
74HC/HCT4020
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
CP to Q
0
39
14
11
22
8
6
55
20
16
19
7
6
11
4
3
17
6
5
6
2
2
30
92
109
140
28
24
75
15
13
170
34
29
75
15
13
175
35
30
95
19
16
215
43
37
95
19
16
210
42
36
110
22
19
225
51
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
Fig.7
t
PHL
/ t
PLH
propagation delay
Q
n
to Q
n
+
1
ns
Fig.7
t
PHL
propagation delay
MR to Q
n
ns
Fig.8
t
THL
/ t
TLH
output transition time
ns
Fig.7
t
W
clock pulse width
HIGH or LOW
80
16
14
80
16
14
50
10
9
6.0
30
35
100
20
17
100
20
17
65
13
11
4.8
24
28
120
24
20
120
24
20
75
15
13
4.0
20
24
ns
Fig.7
t
W
master reset pulse width
HIGH
ns
Fig.8
t
rem
removal time
MR to CP
ns
Fig.8
f
max
maximum clock pulse
frequency
MHz
Fig.7
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