74221 데이터 시트보기 (PDF) - Fairchild Semiconductor
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74221 Datasheet PDF : 9 Pages
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AC Electrical Characteristics
VCC = 5V, TA = 25°C, CL = 15 pF, tr = tf = 6 ns
Symbol
Parameter
Conditions
tPLH
tPHL
tPHL
tPLH
tW
tREM
tWQ(MIN)
tWQ
Maximum Trigger Propagation
Delay A, B or Clear to Q
Maximum Trigger Propagation
Delay A, B or Clear to Q
Maximum Propagation Delay Clear to Q
Maximum Propagation Delay Clear to Q
Minimum Pulse Width A, B or Clear
Minimum Clear Removal Time
Minimum Output Pulse Width
Output Pulse Width
CEXT = 28 pF
REXT = 2 kΩ
CEXT = 1000 pF
REXT = 10 kΩ
Guaranteed
Typ
Units
Limit
22
36
ns
25
42
ns
20
31
ns
22
33
ns
14
26
ns
0
ns
400
ns
10
µs
AC Electrical Characteristics
CL = 50 pF, tr = tf = 6 ns (unless otherwise specified)
Symbol
Parameter
Conditions
VCC
TA = 25°C
Typ
TA = −40 to 85°C TA = −55 to 125°C
Units
Guaranteed Limits
tPLH
Maximum Trigger Propagation
Delay A, B or Clear to Q
2.0V
77
169
194
4.5V
26
42
51
210
ns
57
ns
6.0V
21
32
39
44
ns
tPHL
Maximum Trigger Propagation
Delay A, B or Clear to Q
2.0V
88
197
229
4.5V
29
48
60
250
ns
67
ns
6.0V
24
38
46
51
ns
tPHL
Maximum Propagation
Delay Clear to Q
2.0V
54
114
132
4.5V
23
34
41
143
ns
45
ns
6.0V
19
28
33
36
ns
tPLH
Maximum Propagation
Delay Clear to Q
2.0V
56
116
135
4.5V
25
36
42
147
ns
46
ns
6.0V
20
29
34
37
ns
tW
Minimum Pulse Width
A, B, Clear
2.0V
57
123
144
4.5V
17
30
37
157
ns
42
ns
6.0V
12
21
27
30
ns
tREM
Minimum Clear
Removal Time
2.0V
4.5V
0
0
0
0
0
ns
0
ns
6.0V
0
0
0
ns
tTLH, tTHL Maximum Output
Rise and Fall Time
2.0V
30
75
95
4.5V
8
15
19
110
ns
22
ns
6.0V
7
13
16
19
ns
tWQ(MIN) Minimum Output
Pulse Width
tWQ
Output Pulse Width
CEXT = 28 pF
2.0V
1.5
REXT = 2 kΩ
4.5V 450
REXT = 6 kΩ (VCC = 2V) 6.0V
380
CEXT = 0.1 µF Min 5.0V
1
0.9
REXT = 10 kΩ
Max 5.0V
1
1.1
0.86
1.14
µs
ns
ns
0.85
ms
1.15
ms
CPD
Power Dissipation
87
pF
Capacitance (Note 5)
CIN
Maximum Input
Capacitance (Pins 7 & 15)
12
20
20
20
pF
CIN
Maximum Input
Capacitance (other inputs)
6
10
10
10
pF
Note 5: CPD determines the no load dynamic power consumption, PD = CPD VCC2f + ICC VCC, and the no load dynamic current consumption,
IS = CPD VCCf + ICC.
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