MM74HC4538M データシートの表示（PDF） - Fairchild Semiconductor
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MM74HC4538M Datasheet PDF : 10 Pages
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DC Electrical Characteristics (Continued)
Note 5: The device must be set up with 3 steps before measuring IIN:
Clear
A
B
1. H
L
H
2. H
H
H
3. H
L
H
AC Electrical Characteristics
VCC = 5V, TA = 25° C, CL = 15 pF, tr = tf = 6 ns
Symbol
Parameter
tPLH
Maximum Propagation Delay A, or B to Q
tPHL
Maximum Propagation Delay A, or B to Q
tPHL
Maximum Propagation Delay Clear to Q
tPLH
Maximum Propagation Delay Clear to Q
tW
Minimum Pulse Width A, B or Clear
AC Electrical Characteristics
CL = 50 pF, tr = tf = 6 ns (unless otherwise specified)
Symbol
Parameter
Conditions
tPLH
Maximum Propagation
Delay A, or B to Q
tPHL
Maximum Propagation
Delay A, or B to Q
tPHL
Maximum Propagation
Delay Clear to Q
tPLH
Maximum Propagation
Delay Clear to Q
tTLH, tTHL
tr, tf
tW
Maximum Output
Rise and Fall
Time
Maximum Input
Rise and Fall
Time (Reset only)
Minimum Pulse Width
A, B, Clear
tREC
tWQ
Minimum Recovery
Time, Clear
Inactive to A or B
Output Pulse Width
CX = 12 pF
Min
RX = 1 kΩ
Max
tWQ
Output Pulse Width
CX = 100 pF Min
RX = 10 kΩ
Max
Conditions
Typ
Limit
Units
23
45
ns
26
50
ns
23
45
ns
26
50
ns
10
16
ns
VCC
2.0V
4.5V
6.0V
2.0V
4.5V
6.0V
2.0V
4.5V
6.0V
2.0V
4.5V
6.0V
2.0V
4.5V
6.0V
2.0V
4.5V
6.0V
2.0V
4.5V
6.0V
2.0V
4.5V
6.0V
3.0V
5.0V
3.0V
5.0V
3.0V
5.0V
3.0V
5.0V
TA=25°C
TA=−40 to 85°C TA = −55 to 125°C
Typ
Guaranteed Limits
100 250
315
373
25
50
63
75
21
43
54
63
110 275
347
410
28
55
69
82
23
47
59
70
100 250
315
373
25
50
63
75
21
43
54
63
110 275
347
410
28
55
69
82
23
47
59
70
30
75
95
110
10
15
19
22
8
13
16
19
1000
1000
1000
500
500
500
400
400
400
80
101
119
16
20
24
14
17
20
−5
0
0
0
0
0
0
0
0
0
283 190
147 120
283 400
147 185
1.2
1.0
1.2
1.0
Units
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
µs
µs
µs
µs
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