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DM74LS249N Scheda tecnica(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Il numero della parte DM74LS249N
Spiegazioni elettronici  BCD to 7-Segment Decoder with Open-Collector Outputs
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Produttore elettronici  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

DM74LS249N Scheda tecnica(HTML) 2 Page - National Semiconductor (TI)

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Absolute Maximum Ratings (Note)
Supply Voltage
7V
Input Voltage
7V
Operating Free Air Temperature Range
0 Cto a70 C
Storage Temperature Range
b
65 Cto a150 C
Note
The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaran-
teed The device should not be operated at these limits The
parametric values defined in the ‘‘Electrical Characteristics’’
table 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
Parameter
Min
Nom
Max
Units
VCC
Supply Voltage
475
5
525
V
VIH
High Level Input Voltage
2
V
VIL
Low Level Input Voltage
08
V
IOH
High Level Output Current (BI RBO)
b
025
mA
IOL
Low Level Output Current
8
mA
TA
Free Air Operating Temperature
0
70
C
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
(Note 1)
VI
Input Clamp Voltage
VCC e Min II eb18 mA
b
15
V
VOH
High Level Output Voltage
VCC e Min IOH e Max
27
34
V
(BI RBO)VIL e Max
ICEX
High Level Output Current
VCC e Min VO e 55V
250
m
A
(a thru g)
VOL
Low Level Output Voltage
VCC e Min IOL e Max
035
05
VIH e Min
V
IOL e 4 mA VCC e Min
025
04
II
Input Current
Max
VCC e Max VI e 7V
01
mA
Input Voltage
IIH
High Level Input Current
VCC e Max VI e 27V
20
m
A
IIL
Low Level Input Current
VCC e Max VI e 04V
Inputs
b
04
mA
BI RBO
b
12
IOS
Short Circuit Output Current
VCC e Max (Note 2)
b
03
b
20
mA
ICC
Supply Current
VCC e Max VIN e 45V
15
mA
Note 1
All typicals are at VCC e 5V TA e 25 C
Note 2
Not more than one output should be shorted at a time and the duration should not exceed one second
2


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