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74LVQ138 Datasheet(PDF) 4 Page - STMicroelectronics

Part # 74LVQ138
Description  3 TO 8 LINE DECODER (INVERTING)
PDF  12 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

74LVQ138 Datasheet(HTML) 4 Page - STMicroelectronics

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Table 7: Dynamic Switching Characteristics
1) Worst case package.
2) Max number of outputs defined as (n). Data inputs are driven 0V to 3.3V, (n-1) outputs switching and one output at GND.
3) Max number of data inputs (n) switching. (n-1) switching 0V to 3.3V. Inputs under test switching: 3.3V to threshold (VILD), 0V to threshold
(VIHD), f=1MHz.
Table 8: AC Electrical Characteristics (CL = 50 pF, RL = 500 Ω, Input tr = tf = 3ns)
1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch-
ing in the same direction, either HIGH or LOW (tOSLH = |tPLHm - tPLHn|, tOSHL = |tPHLm - tPHLn|)
2) Parameter guaranteed by design
(*) Voltage range is 3.3V
± 0.3V
Table 9: 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.
VOLP
Dynamic Low
Voltage Quiet
Output (note 1, 2)
3.3
CL = 50 pF
0.2
0.8
V
VOLV
-0.8
-0.2
VIHD
Dynamic High
Voltage Input (note
1, 3)
3.3
2
V
VILD
Dynamic Low
Voltage Input (note
1, 3)
3.3
0.8
V
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.
tPLH tPHL Propagation Delay
Time
A, B, C to Y
2.7
6.6
10.5
12.0
14.0
ns
3.3(*)
5.5
8.0
9.0
10.5
tPLH tPHL Propagation Delay
Time
G1 to Y
2.7
6.7
10.5
12.0
14.0
ns
3.3(*)
5.6
8.0
9.0
10.5
tPLH tPHL Propagation Delay
Time
G2A or G2B to Y
2.7
6.3
10.5
12.0
14.0
ns
3.3(*)
5.2
8.0
9.0
10.5
tOSLH
tOSHL
Output To Output
Skew Time
(note1, 2)
2.7
0.5
1.0
1.0
1.0
ns
3.3(*)
0.5
1.0
1.0
1.0
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
3.3
4
pF
CPD
Power Dissipation
Capacitance (note
1)
3.3
fIN = 10MH
50
pF



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