M74HC279M1R(1993) 查看數據表（PDF） - STMicroelectronics
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M74HC279M1R Datasheet PDF : 10 Pages
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M54/M74HC279
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
(S1, S2 - Q)
6.0
45 130
165
195
15 26
33
39
ns
13 22
28
33
tPLH Propagation
2.0
tPHL Delay Time
4.5
(S - Q)
6.0
38 100
125
150
12 20
25
30
ns
10 17
21
26
tPHL Propagation
2.0
Delay Time
4.5
(R - Q)
6.0
42 120
150
180
14 24
30
36
ns
12 20
26
31
CIN Input Capacitance
5
10
10
10 pF
CPD (*) Power Dissipation
18
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
SWITCHING CHARACTERISTICS TEST WAVEFORM
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