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DM74AS157N View Datasheet(PDF) - Fairchild Semiconductor

Part Name
Description
Manufacturer
DM74AS157N
Fairchild
Fairchild Semiconductor Fairchild
DM74AS157N Datasheet PDF : 7 Pages
1 2 3 4 5 6 7
Absolute Maximum Ratings(Note 1)
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 θJA
N Package
75.0 °C/W
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
Symbol
VCC
VIH
VIL
IOH
IOL
TA
Parameter
Supply Voltage
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Current
LOW Level Output Current
Free Air Operating Temperature
Min
Nom
Max
4.5
5
5.5
2
0.8
2
20
0
70
Electrical Characteristics
over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C.
Symbol
Parameter
Conditions
Min
Typ
Max
VIK
Input Clamp Voltage
VOH
HIGH Level
Output Voltage
VOL
LOW Level
Output Voltage
II
Input Current at Max
Input Voltage
IIH
HIGH Level
Input Current
IIL
LOW Level
Input Current
IO (Note 2) Output Drive Current
ICC
Supply Current
VCC = 4.5V, II = −18 mA
VCC = 4.5V to 5.5V
IOH = −2 mA
VCC = 4.5V
IOL = 20 mA
VCC = 5.5V
Select
VIH = 7V
All Others
VCC = 5.5V
Select
VIH = 2.7V
All Others
VCC = 5.5V
Select
VIL = 0.4V
All Others
VCC = 5.5V, VO = 2.25V
VCC = 5.5V
DM74AS157
DM74AS158
VCC 2
0.35
30
17.5
15.6
1.2
0.5
0.2
0.1
40
20
1
0.5
112
28
22.5
Note 2: The output conditions have been chosen to produce a current that closely approximates one half of the true short circuit current, IOS.
Units
V
V
V
mA
mA
°C
Units
V
V
V
mA
µA
mA
mA
mA
mA
3
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