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74HC4538 数据表(PDF) 7 Page - STMicroelectronics

部件名 74HC4538
功能描述  DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR
PDF  14 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

74HC4538 数据表(HTML) 7 Page - STMicroelectronics

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AC ELECTRICAL CHARACTERISTICS (CL =50 pF, Input tr =tf =6 ns)
Symbol
Parameter
Test Conditions
Value
Unit
VCC
(V)
TA =25
oC
54HC and 74HC
-40 to 85
oC
74HC
-55 to 125
oC
54HC
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
tTLH
tTHL
Output Transition
Time
2.0
30
75
95
110
ns
4.5
8
151922
6.0
7
131619
tPLH
tPHL
Propagation
Delay Time
(A, B - Q, Q)
2.0
120
250
315
375
ns
4.5
30
50
63
75
6.0
25
43
54
64
tPLH
tPHL
Propagation
Delay Time
(CD - Q, Q)
2.0
100
195
245
295
ns
4.5
25
39
49
59
6.0
20
33
42
50
tWOUT
Output Pulse
Width
2.0
CX =0
RX =5K
Ω
540
1200
1500
1800
ns
4.5
RX =1K
Ω
180
250
320
375
6.0
RX =1K
Ω
150
200
260
320
2.0
CX = 0.01
µF
RX = 10K
Ω
70
83
96
70
96
70
96
µs
4.5
69
77
85
69
85
69
85
6.0
69
77
85
69
85
69
85
2.0
CX = 0.1
µF
RX = 10K
Ω
0.67
0.75
0.83
0.67
0.83
0.67
0.9
ms
4.5
0.67
0.73
0.77
0.67
0.77
0.67
0.8
6.0
0.67
0.73
0.77
0.67
0.77
0.67
0.8
∆tWOUT
Output Pulse
Width Error
Between Circuits
(In same pack)
±1
%
tW(H)
tW(L)
Minimum Pulse
Width
(CLOCK)
2.0
30
75
95
110
ns
4.5
8
151922
6.0
7
131619
tW(L)
Minimum Pulse
Width
(CLEAR)
2.0
30
75
95
110
ns
4.5
8
151922
6.0
7
131619
tREM
Minimum Clear
Removal Time
2.0
0
151520
ns
4.5
0
5
5
7
6.0
0
5
5
ts
Minimum
Retrigger Time
2.0
CX = 0.1
µF
RX =1K
Ω
380
6
ns
4.5
92
6.0
72
2.0
CX = 0.01
µF
RX =1K
Ω
6
µs
4.5
1.4
6.0
1.2
CIN
Input Capacitance
5
10
10
10
pF
CPD (*)
Power Dissipation
Capacitance
70
pF
(*) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.
(Refer to Test Circuit). Average operting current can be obtained by the following equation. ICC(opr) = CPD
•VCC •fIN +ICC‘ •Duty/100 + ICC/2 (per circuit)
(ICC‘ = Active Supply Current)
(Duty = %))
M54/ M74HC4538
7/14



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