M54HC279 ST Microelectronics, M54HC279 Datasheet - Page 4

• Manufacturer Part Number: M54HC279
• Description: QUAD S - R LATCH
• Manufacturer: ST Microelectronics

M54/M74HC279
AC ELECTRICAL CHARACTERISTICS (C
(*) C
(Refer to Test Circuit). Average operting current can be obtained by the following equation. I
SWITCHING CHARACTERISTICS TEST WAVEFORM
4/10
Symbol
C
t
t
t
t
t
t
t
PD
C
TLH
THL
PLH
PHL
PLH
PHL
PHL
PD
IN
(*)
is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.
Output Transition
Time
Propagation
Delay Time
(S1, S2 - Q)
Propagation
Delay Time
(S - Q)
Propagation
Delay Time
(R - Q)
Input Capacitance
Power Dissipation
Capacitance
Parameter
V
(V)
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
CC
Test Conditions
L
= 50 pF, Input t
Min.
54HC and 74HC
T
A
Typ.
= 25
30
45
15
13
38
12
10
42
14
12
18
8
7
5
o
C
Max.
130
100
120
75
15
13
26
22
20
17
24
20
10
CC
r
(opr) = C
= t
Value
f
-40 to 85
Min.
= 6 ns)
PD
74HC
V
CC
Max.
165
125
150
95
19
16
33
28
25
21
30
26
10
o
f
C
IN
+ I
-55 to 125
CC
Min.
54HC
Max.
110
195
150
180
22
19
39
33
30
26
36
31
10
o
C
Unit
pF
pF
ns
ns
ns
ns