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M74HC294 数据表(PDF) 6 Page - STMicroelectronics

部件名 M74HC294
功能描述  PROGRAMMABLE DIVIDER/TIMER
PDF  11 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

M74HC294 数据表(HTML) 6 Page - STMicroelectronics

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AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns)
CAPACITIVE CHARACTERISTICS
1) 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 operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC
Symbol
Parameter
Test Condition
Value
Unit
VCC
(V)
TA = 25°C
-40 to 85°C
-55 to 125°C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
tTLH tTHL Output Transition
Time (Q)
2.0
30
75
95
110
ns
4.5
8
151922
6.0
7
131619
tTLH tTHL Output Transition
Time (TP)
2.0
116
225
280
340
ns
4.5
29
45
56
68
6.0
25
38
48
57
tPLH tPHL Propagation Delay
Time
(CLK - Q)
2.0
145
330
415
ns
4.5
43
66
83
15
6.0
37
56
71
84
tPHL
Propagation Delay
Time
(CLR - Q)
2.0
110
260
325
390
ns
4.5
34
52
65
78
6.0
29
44
55
66
fMAX
Maximum Clock
Frequency
2.0
6.0
20
5
4
MHz
4.5
32
64
26
21
6.0
38
75
31
25
tW(L)
tW(H)
Minimum Pulse
Width (CLK)
2.0
40
75
95
110
ns
4.5
8
151922
6.0
7
131620
tW(L)
Minimum Pulse
Width (CLR)
2.0
40
100
125
150
ns
4.5
10
20
25
30
6.0
9
172126
tREM
Minimum Removal
Time
2.0
0
0
0
ns
4.5
0
0
0
6.0
0
0
0
Symbol
Parameter
Test Condition
Value
Unit
VCC
(V)
TA = 25°C
-40 to 85°C
-55 to 125°C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
CIN
Input Capacitance
5.0
5
101010
pF
CPD
Power Dissipation
Capacitance (note
1)
5.0
23
pF



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