參數資料
型號: 74221
廠商: Hitachi,Ltd.
英文描述: Dual Monostable Multivibrators (with Schmitt Trigger Input)
中文描述: 雙(與施密特觸發(fā)輸入單穩(wěn)態(tài)多頻振蕩器)
文件頁數: 6/15頁
文件大?。?/td> 250K
代理商: 74221
6
Philips Semiconductors
Product specification
Dual non-retriggerable monostable
multivibrator with reset
74HC/HCT221
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
.
Output capability: standard (except for nR
EXT
/C
EXT
)
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
PLH
propagation delay (trigger)
nA, nB to nQ
72
26
21
80
29
23
58
21
17
63
23
18
66
24
19
58
21
17
19
7
6
25
9
7
30
11
9
25
9
7
700 770
220
44
37
245
49
42
180
36
31
195
39
33
200
40
34
180
36
31
75
15
13
275
55
47
305
61
52
225
45
38
245
49
42
250
50
43
225
45
38
95
19
16
330
66
56
370
74
63
270
54
46
295
59
50
300
60
51
270
54
46
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
5.0
C
EXT
= 0 pF;
R
EXT
= 5 k
;
Fig.10
C
EXT
= 0 pF;
R
EXT
= 5 k
;
Fig.10
C
EXT
= 0 pF;
R
EXT
= 5 k
;
Fig.10
C
EXT
= 0 pF;
R
EXT
= 5 k
;
Fig.10
C
EXT
= 0 pF;
R
EXT
= 5 k
;
Fig.11
C
EXT
= 0 pF;
R
EXT
= 5 k
;
Fig.11
Fig.10
t
PLH
propagation delay (trigger)
nR
D
to nQ
ns
t
PHL
propagation delay (trigger)
nA, nB to nQ
ns
t
PHL
propagation delay (trigger)
nR
D
to nQ
ns
t
PLH
propagation delay (reset)
nR
D
to nQ
ns
t
PLH
propagation delay (reset)
nR
D
to nQ
ns
t
THL
/
t
TLH
output transition time
ns
t
W
trigger pulse width
nA = LOW
75
15
13
90
18
15
75
15
13
630
95
19
16
115
23
20
95
19
16
602
110
22
19
135
27
23
110
22
19
595
ns
Fig.7
t
W
trigger pulse width
nB = HIGH
ns
Fig.7
t
W
trigger pulse width
nR
D
= LOW
ns
Fig.8
t
W
output pulse width
nQ = LOW
nQ = HIGH
798
805
μ
s
C
EXT
= 100 nF;
R
EXT
= 10 k
;
Fig.10
相關PDF資料
PDF描述
74221 High Speed CMOS Logic Dual Monostable Multivibrator with Reset
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