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DM74LS90 Datasheet(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. DM74LS90
Description  Decade and Binary Counters
Download  10 Pages
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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 2 page
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Absolute Maximum Ratings (Note)
If MilitaryAerospace specified devices are required
please contact the National Semiconductor Sales
OfficeDistributors for availability and specifications
Supply Voltage
7V
Input Voltage (Reset)
7V
Input Voltage (A or B)
55V
Operating Free Air Temperature Range
DM74LS
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
DM74LS90
Units
Min
Nom
Max
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
b
04
mA
IOL
Low Level Output Current
8
mA
fCLK
Clock Frequency (Note 1)
A to QA
032
MHz
BtoQB
016
fCLK
Clock Frequency (Note 2)
A to QA
020
MHz
BtoQB
010
tW
Pulse Width (Note 1)
A
15
B30
ns
Reset
15
tW
Pulse Width (Note 2)
A
25
B50
ns
Reset
25
tREL
Reset Release Time (Note 1)
25
ns
tREL
Reset Release Time (Note 2)
35
ns
TA
Free Air Operating Temperature
0
70
C
Note 1
CL e 15 pF RL e 2kX TA e 25 C and VCC e 5V
Note 2
CL e 50 pF RL e 2kX TA e 25 C and VCC e 5V
’LS90 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
VCC e Min IOH e Max
27
34
V
Voltage
VIL e Max VIH e Min
VOL
Low Level Output
VCC e Min IOL e Max
Voltage
VIL e Max VIH e Min
035
05
V
(Note 4)
IOL e 4 mA VCC e Min
025
04
II
Input Current
Max
VCC e Max VI e 7V
Reset
01
Input Voltage
VCC e Max
A
02
mA
VI e 55V
B
04
2




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