74LS390 데이터 시트보기 (PDF) - Fairchild Semiconductor
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74LS390 Datasheet PDF : 6 Pages
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Absolute Maximum Ratings(Note 3)
Supply Voltage
7V
Input Voltage
Clear
7V
A or B
5.5V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range
−65°C to +150°C
Note 3: 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
Parameter
Min
VCC
Supply Voltage
4.75
VIH
HIGH Level Input Voltage
2
VIL
LOW Level Input Voltage
IOH
HIGH Level Output Current
IOL
LOW Level Output Current
fCLK
Clock Frequency (Note 4) A to QA
0
B to QB
0
fCLK
Clock Frequency (Note 5) A to QA
0
B to QB
0
tW
Pulse Width (Note 4)
A
20
B
25
Clear HIGH
20
tREL
Clear Release Time (Note 6)(Note 7)
25↓
TA
Free Air Operating Temperature
0
Note 4: CL = 15 pF, RL = 2 kΩ, TA = 25°C and VCC = 5V.
Note 5: CL = 50 pF, RL = 2 kΩ, TA = 25°C and VCC = 5V.
Note 6: The symbol (↓) indicates the falling edge of the clear pulse is used for reference.
Note 7: TA = 25°C and VCC = 5V.
Nom
5
Max
5.25
0.8
−0.4
8
25
20
20
15
70
Units
V
V
V
mA
mA
MHz
MHz
ns
ns
°C
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Typ
Min
Max
(Note 8)
Units
VI
Input Clamp Voltage
VOH
HIGH Level
Output Voltage
VOL
LOW Level
Output Voltage
II
Input Current @ Max
Input Voltage
IIH
HIGH Level
Input Current
VCC = Min, II = −18 mA
VCC = Min, IOH = Max
VIL = Max, VIH = Min
VCC = Min, IOL = Max
VIL = Max, VIH = Min
IOL = 4 mA, VCC = Min
VCC = Max, VI = 7V
VCC = Max
VI = 5.5V
VCC = Max
VI = 2.7V
Clear
A
B
Clear
A
B
−1.5
V
2.7
3.4
V
0.35
0.5
V
0.25
0.4
0.1
0.2
mA
0.4
20
40
µA
80
IIL
LOW Level
Input Current
VCC = Max, VI = 0.4V
Clear
A
−0.4
−1.6
mA
B
−2.4
IOS
Short Circuit Output Current
ICC
Supply Current
Note 8: All typicals are at VCC = 5V, TA = 25°C.
VCC = Max (Note 9)
VCC = Max (Note 10)
−20
−100
mA
15
26
mA
Note 9: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 10: ICC is measured with all outputs OPEN, both CLEAR inputs grounded following momentary connection to 4.5 and all other inputs grounded.
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