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54HC244 データシート(PDF) 5 Page - STMicroelectronics

部品番号 54HC244
部品情報  RAD-HARD OCTAL BUS BUFFER WITH 3 STATE OUTPUTS (NON INVERTED)
PDF  10 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

54HC244 データシート(HTML) 5 Page - STMicroelectronics

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



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