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DM74AS157M Datenblatt(Datasheet) 3 Page - Fairchild Semiconductor

Teile-Nr. DM74AS157M
Beschreibung  Quad 1 of 2 Line Data Selector/Multiplexer
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Hersteller  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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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.
Note 2: The output conditions have been chosen to produce a current that closely approximates one half of the true short circuit current, IOS.
Supply Voltage
7V
Input Voltage
7V
Operating Free Air Temperature Range
0
°C to +70°C
Storage Temperature Range
−65°C to +150°C
Typical
θ
JA
N Package
75.0
°C/W
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
−2mA
IOL
LOW Level Output Current
20
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
VCC = 4.5V to 5.5V
VCC − 2V
Output Voltage
IOH = −2 mA
VOL
LOW Level
VCC = 4.5V
0.35
0.5
V
Output Voltage
IOL = 20 mA
II
Input Current at Max
VCC = 5.5V
Select
0.2
mA
Input Voltage
VIH = 7V
All Others
0.1
IIH
HIGH Level
VCC = 5.5V
Select
40
µA
Input Current
VIH = 2.7V
All Others
20
IIL
LOW Level
VCC = 5.5V
Select
−1
mA
Input Current
VIL = 0.4V
All Others
−0.5
IO (Note 2) Output Drive Current
VCC = 5.5V, VO = 2.25V
−30
−112
mA
ICC
Supply Current
VCC = 5.5V
DM74AS157
17.5
28
mA
DM74AS158
15.6
22.5
mA




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