參數(shù)資料
型號(hào): HEF4020B
廠商: NXP Semiconductors N.V.
元件分類: 通用總線功能
英文描述: 14-stage binary counter(14級(jí)二進(jìn)制計(jì)數(shù)器(MSI))
中文描述: 14級(jí)二進(jìn)制計(jì)數(shù)器(14級(jí)二進(jìn)制計(jì)數(shù)器(微星))
文件頁(yè)數(shù): 4/6頁(yè)
文件大?。?/td> 61K
代理商: HEF4020B
January 1995
4
Philips Semiconductors
Product specification
14-stage binary counter
HEF4020B
MSI
AC CHARACTERISTICS
V
SS
= 0 V; T
amb
= 25
°
C; C
L
= 50 pF; input transition times
20 ns; see also waveforms Fig.4
V
DD
V
SYMBOL
MIN.
TYP.
MAX.
TYPICAL EXTRAPOLATION
FORMULA
Propagation delays
CP
→ Ο
0
HIGH to LOW
5
105
45
30
105
50
35
80
30
20
70
25
20
180
90
70
60
30
20
60
30
20
25
15
10
65
50
45
60
35
25
10
25
35
210
90
65
210
95
70
160
60
40
140
50
40
360
180
140
120
60
40
120
60
40
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MHz
MHz
MHz
78 ns
+
34 ns
+
22 ns
+
78 ns
+
39 ns
+
27 ns
+
53 ns
+
19 ns
+
12 ns
+
43 ns
+
14 ns
+
12 ns
+
153 ns
+
79 ns
+
62 ns
+
10 ns
+
9 ns
+
6 ns
+
10 ns
+
9 ns
+
6 ns
+
(0,55 ns/pF) C
L
(0,23 ns/pF) C
L
(0,16 ns/pF) C
L
(0,55 ns/pF) C
L
(0,23 ns/pF) C
L
(0,16 ns/pF) C
L
(0,55 ns/pF) C
L
(0,23 ns/pF) C
L
(0,16 ns/pF) C
L
(0,55 ns/pF) C
L
(0,23 ns/pF) C
L
(0,16 ns/pF) C
L
(0,55 ns/pF) C
L
(0,23 ns/pF) C
L
(0,16 ns/pF) C
L
(1,0 ns/pF) C
L
(0,42 ns/pF) C
L
(0,28 ns/pF) C
L
(1,0 ns/pF) C
L
(0,42 ns/pF) C
L
(0,28 ns/pF) C
L
10
15
5
10
15
5
10
15
5
10
15
5
10
15
t
PHL
LOW to HIGH
t
PLH
O
n
O
n
+
1
HIGH to LOW
t
PHL
LOW to HIGH
t
PLH
MR
O
n
HIGH to LOW
t
PHL
Output transition times
HIGH to LOW
5
10
15
5
10
15
t
THL
LOW to HIGH
t
TLH
Minimum clock
pulse width; HIGH
5
50
25
20
130
95
90
115
65
55
10
15
t
WCPH
Minimum MR
pulse width; HIGH
5
10
15
t
WMRH
Recovery time
for MR
5
10
15
t
RMR
Maximum clock
pulse frequency
5
5
10
15
f
max
13
18
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