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M74HC148 Datasheet(PDF) 5 Page - STMicroelectronics

Part # M74HC148
Description  8 TO 3 LINE PRIORITY ENCODER
PDF  11 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M74HC148 Datasheet(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 x VCC x fIN + ICC
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.
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 (In - A0, A1,
A2)
2.0
60
150
190
225
ns
4.5
19
30
38
45
6.0
16
26
32
38
tPLH tPHL Propagation Delay
Time (In - EO, GS)
2.0
60
150
190
225
ns
4.5
19
30
38
45
6.0
16
26
32
38
tPLH tPHL Propagation Delay
Time ( EI -EO)
2.0
40
115
145
175
ns
4.5
14
23
29
35
6.0
12
20
25
30
tPLH tPHL Propagation Delay
Time (EI -GS)
2.0
40
115
145
175
ns
4.5
14
23
29
35
6.0
12
20
25
30
tPLH tPHL Propagation Delay
Time (EI - A0, A1,
A2)
2.0
40
115
145
175
ns
4.5
14
23
29
35
6.0
12
20
25
30
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
101010
pF
CPD
Power Dissipation
Capacitance (note
1)
5.0
60
pF



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