MC14538BD 查看數據表（PDF） - ON Semiconductor
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MC14538BD Datasheet PDF : 12 Pages
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MC14538B
ÎÎSÎÎWIÎÎTCHÎÎINGÎÎCHÎÎARÎÎACÎÎTERÎÎISTÎÎICSÎÎ(NoÎÎte 4ÎÎ) (CÎÎL = 5ÎÎ0 pFÎÎ, TAÎÎ= 25ÎÎ_C)ÎÎÎÎÎÎÎÎÎÎÎÎÎÎAÎÎll TyÎÎpesÎÎÎÎÎÎÎÎÎÎÎÎ
Characteristic
Symbol
VDD
Vdc
Min
Typ
Max
Unit
(Note 5)
Output Rise Time
tTLH = (1.35 ns/pF) CL + 33 ns
tTLH = (0.60 ns/pF) CL + 20 ns
tTLH = (0.40 ns/pF) CL + 20 ns
Output Fall Time
tTHL = (1.35 ns/pF) CL + 33 ns
tTHL = (0.60 ns/pF) CL + 20 ns
tTHL = (0.40 ns/pF) CL + 20 ns
Propagation Delay Time
A or B to Q or Q
tPLH, tPHL = (0.90 ns/pF) CL + 255 ns
tPLH, tPHL = (0.36 ns/pF) CL + 132 ns
tPLH, tPHL = (0.26 ns/pF) CL + 87 ns
Reset to Q or Q
tPLH, tPHL = (0.90 ns/pF) CL + 205 ns
tPLH, tPHL = (0.36 ns/pF) CL + 107 ns
tPLH, tPHL = (0.26 ns/pF) CL + 82 ns
Input Rise and Fall Times
Reset
tTLH
ns
5.0
−
100
200
10
−
50
100
15
−
40
80
tTHL
ns
5.0
−
100
200
10
−
50
100
15
−
40
80
tPLH,
ns
tPHL
5.0
−
300
600
10
−
150
300
15
−
100
220
ns
5.0
−
250
500
10
−
125
250
15
−
95
190
tr, tf
5
−
−
15
ms
10
−
−
5
15
−
−
4
B Input
5
−
300
1.0
ms
10
−
1.2
0.1
15
−
0.4
0.05
A Input
5
−
10
No Limit
15
Input Pulse Width
A, B, or Reset
tWH,
5.0
170
85
−
ns
tWL
10
90
45
−
15
80
40
−
Retrigger Time
trr
5.0
0
−
−
ns
10
0
−
−
15
0
−
−
Output Pulse Width — Q or Q
Refer to Figures 8 and 9
CX = 0.002 mF, RX = 100 kW
T
ms
5.0
198
210
230
10
200
212
232
15
202
214
234
CX = 0.1 mF, RX = 100 kW
5.0
9.3
9.86
10.5
ms
10
9.4
10
10.6
15
9.5
10.14
10.7
CX = 10 mF, RX = 100 kW
5.0
0.91
0.965
1.03
s
10
0.92
0.98
1.04
15
0.93
0.99
1.06
Pulse Width Match between circuits in
the same package.
CX = 0.1 mF, RX = 100 kW
100
5.0
[(T1 – T2)/T1]
10
15
−
± 1.0
± 5.0
%
−
± 1.0
± 5.0
−
± 1.0
± 5.0
4. The formulas given are for the typical characteristics only at 25_C.
5. Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance.
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ OPERATING CONDITIONS
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ External Timing Resistance
RX
−
5.0
−
(Note 6)
kW
External Timing Capacitance
CX
−
0
−
No Limit
mF
(Note 7)
6. The maximum usable resistance RX is a function of the leakage of the capacitor CX, leakage of the MC14538B, and leakage due to board
layout and surface resistance. Susceptibility to externally induced noise signals may occur for RX > 1 MW..
7. If CX > 15 mF, use discharge protection diode per Fig. 11.
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