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M74HC238 датащи(PDF) 5 Page - STMicroelectronics

номер детали M74HC238
подробное описание детали  3 TO 8 LINE DECODER
PDF  10 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M74HC238 датащи(HTML) 5 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
(A, B, C - Y)
2.0
50
150
190
225
ns
4.5
17
30
38
45
6.0
15
26
32
38
tPLH
tPHL
Propagation
Delay Time
(G1 - Y)
2.0
50
150
190
225
ns
4.5
17
30
38
45
6.0
15
26
32
38
tPLH
tPHL
Propagation
Delay Time
(G2 - Y)
2.0
50
150
190
225
ns
4.5
17
30
38
45
6.0
15
26
32
38
CIN
Input Capacitance
5
10
10
10
pF
CPD (*)
Power Dissipation
Capacitance
53
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
TEST CIRCUIT ICC (Opr.)
SWITCHING CHARACTERISTICS TEST
WAVEFORM
INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF
SWITCHING CHARACTERISTICS TEST.
M54/M74HC238
5/10



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