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DM74ALS157N Fiches technique(PDF) 3 Page - Fairchild Semiconductor

No de pièce DM74ALS157N
Description  Quad 1-of-2 Line Data Selector/Multiplexer
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Fabricant  FAIRCHILD [Fairchild Semiconductor]
Site Internet  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

DM74ALS157N Fiches technique(HTML) 3 Page - Fairchild Semiconductor

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Absolute Maximum Ratings(Note 1)
Note 1: The “Absolute Maximum Ratings” are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
Recommended Operating Conditions
Electrical Characteristics
over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C.
Switching Characteristics
over recommended operating free air temperature range.
Supply Voltage
7V
Input Voltage
7V
Operating Free Air Temperature Range
0
°C to +70°C
Storage Temperature Range
−65°C to +150°C
Symbol
Parameter
Min
Nom
Max
Units
VCC
Supply Voltage
4.5
5
5.5
V
VIH
HIGH Level Input Voltage
2
V
VIL
LOW Level Input Voltage
0.8
V
IOH
HIGH Level Output Current
−0.4
mA
IOL
LOW Level Output Current
8
mA
TA
Free Air Operating Temperature
0
70
°C
Symbol
Parameter
Conditions
Min
Typ
Max
Units
VIK
Input Clamp Voltage
VCC = 4.5V, II = −18 mA
−1.2
V
VOH
HIGH Level Output Voltage
IOH = −0.4 mA, VCC = 4.5V to 5.5V
VCC − 2V
VOL
LOW Level
VCC = 4.5V
IOL = 4 mA
0.25
0.4
V
Output Voltage
IOL = 8 mA
0.35
0.5
V
II
Input Current @ Maximum
VCC = 5.5V, VIH = 7V
0.1
mA
Input Voltage
IIH
HIGH Level Input Current
VCC = 5.5V, VIH = 2.7V
20
µA
IIL
LOW Level Input Current
VCC = 5.5V, VIL = 0.4V
−0.1
mA
IO
Output Drive Current
VCC = 5.5V
VO = 2.25V
−30
−112
mA
ICC
Supply Current
VCC = 5.5V
DM74ALS157
6
11
mA
All Inputs
= 4.5V
DM74ALS158
5
10
mA
Symbol
Parameter
From (Input)
Conditions
DM74ALS157
DM74ALS158
Units
To (Output)
Min
Max
Min
Max
tPLH
Propagation Delay Time
Data to Y
VCC = 4.5V to 5.5V
3
14
3
15
ns
LOW-to-HIGH Level Output
CL = 50 pF
tPHL
Propagation Delay Time
RL = 500Ω
2
121
8ns
HIGH-to-LOW Level Output
tPLH
Propagation Delay Time
Strobe to Y
6
20
5
18
ns
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
4
13
5
18
ns
HIGH-to-LOW Level Output
tPLH
Propagation Delay Time
Select to Y
7
24
5
19
ns
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
4
14
5
18
ns
HIGH-to-LOW Level Output


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