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M74HC298 Datasheet(PDF) 5 Page - STMicroelectronics

No. de pieza M74HC298
Descripción Electrónicos  QUAD 2 CHANNEL MULTIPLEXER/REGISTER
PDF  11 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M74HC298 Datasheet(HTML) 5 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/4 (per BIT),
and the CPD for operating current can be obtained by the following equation : CPD = 27 + 12 x n
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
2.0
30
75
95
110
ns
4.5
8
151922
6.0
7
131619
tPLH tPHL Propagation Delay
Time (CLOCK - Q)
2.0
45
125
155
190
ns
4.5
15
25
31
38
6.0
13
21
26
32
fMAX
Maximum Clock
Frequency
2.0
7
22
5.6
4.6
MHz
4.5
35
67
28
23
6.0
41
79
33
25
tW(H)
tW(L)
Minimum Pulse
Width (CLOCK)
2.0
18
75
95
110
ns
4.5
6
151922
6.0
6
131619
tS
Minimum Set-up
Time (A, B, C, D to
CLOCK)
2.0
12
50
65
75
ns
4.5
3
101315
6.0
2
9
11
13
tS
Minimum Set-up
Time (W. S. to
CLOCK)
2.0
30
75
95
110
ns
4.5
8
151922
6.0
6
131619
tH
Minimum Hold
Time (A, B, C, D to
CLOCK)
2.0
25
30
40
ns
4.5
5
6
8
6.0
4
5
7
tH
Minimum Hold
Time (W. S. to
CLOCK)
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
39
pF



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