54HC244 데이터 시트보기 (PDF) - STMicroelectronics
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54HC244 Datasheet PDF : 10 Pages
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M54HC244
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns)
Test Conditions
Value
Symbol
Parameter
tTLH tTHL Output Transition
Time
tPLH tPHL Propagation Delay
Time
tPZL tPZH High Impedance
Output Enable
Time
tPLZ tPHZ High Impedance
Output Disable
Time
VCC CL
(V) (pF)
2.0
4.5 50
6.0
2.0
4.5 50
6.0
2.0
4.5 150
6.0
2.0
4.5 50
6.0
2.0
4.5 150
6.0
2.0
4.5 50
6.0
RL = 1 KΩ
RL = 1 KΩ
RL = 1 KΩ
TA = 25°C
-40 to 85°C -55 to 125°C Unit
Min. Typ. Max. Min. Max. Min. Max.
25 60
75
90
7 12
19
18 ns
6 10
13
15
36 90
115
135
12 18
23
27 ns
10 15
20
23
51 130
165
195
17 26
33
39 ns
14 22
28
33
48 125
155
190
16 25
31
38 ns
14 21
25
32
63 165
205
250
21 33
41
50 ns
18 28
35
43
32 125
155
190
15 25
31
38 ns
14 21
26
32
CAPACITIVE CHARACTERISTICS
Test Condition
Value
Symbol
Parameter
VCC
(V)
TA = 25°C
-40 to 85°C -55 to 125°C Unit
Min. Typ. Max. Min. Max. Min. Max.
CIN Input Capacitance 5.0
5 10
10
10 pF
COUT
Output
Capacitance
5.0
10
pF
CPD Power Dissipation
Capacitance (note 5.0
33
pF
1)
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/8 (per circuit)
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