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M74HC279C1R Datasheet(PDF) 4 Page - STMicroelectronics

Part # M74HC279C1R
Description  QUAD S - R LATCH
Download  10 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M74HC279C1R Datasheet(HTML) 4 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
(S1, S2 - Q)
2.0
45
130
165
195
ns
4.5
15
26
33
39
6.0
13
22
28
33
tPLH
tPHL
Propagation
Delay Time
(S - Q)
2.0
38
100
125
150
ns
4.5
12
20
25
30
6.0
10
17
21
26
tPHL
Propagation
Delay Time
(R - Q)
2.0
42
120
150
180
ns
4.5
14
24
30
36
6.0
12
20
26
31
CIN
Input Capacitance
5
10
10
10
pF
CPD (*)
Power Dissipation
Capacitance
18
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
M54/M74HC279
4/10


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