參數(shù)資料
型號: 74HC221
廠商: NXP Semiconductors N.V.
英文描述: Dual non-retriggerable monostable multivibrator with reset
中文描述: 雙非retriggerable帶復位單穩(wěn)態(tài)觸發(fā)器
文件頁數(shù): 6/15頁
文件大?。?/td> 250K
代理商: 74HC221
December 1990
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(guān)PDF資料
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74221 Dual non-retriggerable monostable multivibrator with reset
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