M74HC298M1R(1992) データシートの表示（PDF） - STMicroelectronics
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M74HC298M1R Datasheet PDF : 11 Pages
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M54/M74HC298
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Symbol
Parameter
Test Conditions
VCC
(V)
TA = 25 oC
54HC and 74HC
Value
-40 to 85 oC -55 to 125 oC Unit
74HC
54HC
Min. Typ. Max. Min. Max. Min. Max.
tTLH Output Transition 2.0
tTHL Time
4.5
30 75
8
15
95
110
19
22
ns
6.0
7
13
16
19
tPLH Propagation
2.0
tPHL Delay Time
4.5
(CLOCK - Q)
6.0
45 125
155
190
15 25
31
38
ns
13 21
26
32
fMAX Maximum Clock 2.0
Frequency
4.5
7
22
5.6
4.6
35 67
28
23
MHz
6.0
41 79
33
25
tW(H) Minimum Pulse
2.0
tW(L) Width
4.5
(CLOCK)
6.0
18 75
6
15
6
13
95
110
19
22
ns
16
19
ts
Minimum Set-up 2.0
Time
4.5
(A, B, C, D)
6.0
12 50
65
75
3
10
13
15
ns
2
9
11
13
ts
Minimum Set-up 2.0
Time
4.5
(W. S.)
6.0
30 75
8
15
6
13
95
110
19
22
ns
16
19
th
Minimum Hold
2.0
Time
4.5
(A, B, C, D)
6.0
25
30
40
5
6
8
ns
4
5
7
th
Minimum Hold
2.0
Time
4.5
(W. S.)
6.0
0
0
0
0
0
0
ns
0
0
0
CIN Input Capacitance
5
10
10
10 pF
CPD (*) Power Dissipation
39
Capacitance
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/4 (per bit), and the CPD for
operating current can be obtained by the following equation: CPD = 27 + 12 x n
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