DM74LS247M 查看數據表（PDF） - Fairchild Semiconductor
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DM74LS247M Datasheet PDF : 4 Pages
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Absolute Maximum Ratings (Note 1)
Supply Voltage
7V
Input Voltage
7V
Operating Free Air
Temperature Range
Storage Temperature Range
0˚C to +70˚C
−65˚C to +150˚C
Recommended Operating Conditions
Symbol
Parameter
Min
Nom
Max
Units
VCC
Supply Voltage
4.75
5
5.25
V
VIH
High Level Input Voltage
2
V
VIL
Low Level Input Voltage
0.8
V
IOH
High Level Output Current BI/RBO
−50
µA
IOL
Low Level Output Current
24
mA
TA
Free Air Operating Temperature
0
70
˚C
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” table are not guaranteed at the absolute maximum ratings. The “Recommended Operating
Conditions” table will define the conditions for actual device operation.
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
VI
Input Clamp Voltage
VOH
High Level Output Voltage
IOFF
Output High Current
VCC = Min, II = − 18 mA
VCC = Min, IOH = Max, VIL = Max
VCC = 5.5V, VO = 15V
Segment Outputs
VOL
Low Level Output Voltage
VCC =
Min
IOL = Max, VIH = Min
II
Input Current @ Max
IOL = 3.2 mA
IOL = 12 mA
IOL = 1.6 mA
VCC = Max, VI = 7V
BI/RBO
a –g
BI/RBO
Input Voltage
IIH
High Level Input Current
VCC = Max, VI = 2.7V
IIL
Low Level Input Current
VCC = Max, VI = 0.4V
Other Inputs
VCC = Max, VI = 0.4V
BI/RBO Input
IOS
Short Circuit Output Current
VCC = Max (Note 3)
ICC
Supply Current
VCC = Max
Note 2: All typicals are at VCC = 5V, TA = 25˚C.
Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.
2.4
−0.3
Typ
(Note 2)
3.4
0.35
0.25
Max Units
−1.5 V
V
250 µA
0.5
V
0.5
0.4
0.4
0.1 mA
20
µA
−0.4 mA
−1.2 mA
−2.0 mA
13 mA
Switching Characteristics
VCC = +5V, TA = +25˚C
Symbol
Parameter
tPLH
Propagation Delay Time
Low to High Level Output
tPHL
Propagation Delay Time
High to Low Level Output
RL = 2 kΩ
CL = 15 pF
Min
Max
100
100
Units
ns
ns
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