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74LCX139 数据表(PDF) 8 Page - STMicroelectronics

部件名 74LCX139
功能描述  Low voltage CMOS Dual 2 to 4 decoder / demultiplexer
Download  17 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

74LCX139 数据表(HTML) 8 Page - STMicroelectronics

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Electrical characteristics
74LCX139
8/17
Table 7. AC electrical characteristics
Symbol
Parameter
Test condition
Value
Unit
VCC
(V)
CL
(pF)
RL
(
Ω)
ts = tr
(ns)
-40 to 85 °C
Min
Max
tPLH tPHL Propagation
Delay Time A, B
to Y
2.7
50
500
2.5
7.3
ns
3.0 to 3.6
1.0
6.2
tPLH tPHL Propagation
Delay Time G to Y
2.7
50
500
2.5
5.8
ns
3.0 to 3.6
1.0
5.3
tOSLH
tOSHL
Output To Output
Skew Time (1) (2)
1.
Skew is defined as the absolute value of the difference between the actual propagation delay for any two
outputs of the same device switching in the same direction, either HIGH or LOW (tOSLH = | tPLHm - tPLHn|,
tOSHL = | tPHLm - tPHLn|)
2.
Parameter guaranteed by design
3.0 to 3.6
50
500
2.5
1.0
ns
Table 8. Capacitive characteristics
Symbol
Parameter
Test condition
Value
Unit
VCC
(V)
TA = 25 °C
Min
Typ
Max
CIN
Input capacitance
3.3
VIN = 0 to VCC
6pF
CPD
Power dissipation
capacitance (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
3.3
fIN = 10MHz
VIN = 0 or VCC
26
pF


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