DM74LS244SJ 查看數據表（PDF） - Fairchild Semiconductor
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DM74LS244SJ Datasheet PDF : 6 Pages
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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
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
4.75
5
2
0
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Min
Conditions
VI
Input Clamp Voltage
VCC = Min, II = −18 mA
HYS
Hysteresis (VT+ − VT−)
VCC = Min
0.2
Data Inputs Only
VOH
HIGH Level Output Voltage
VOL
LOW Level Output Voltage
IOZH
IOZL
Off-State Output Current,
HIGH Level Voltage Applied
Off-State Output Current,
LOW Level Voltage Applied
VCC = Min, VIH = Min
2.7
VIL = Max, IOH = −1 mA
VCC = Min, VIH = Min
2.4
VIL = Max, IOH = −3 mA
VCC = Min, VIH = Min
2
VIL = 0.5V, IOH = Max
VCC = Min
IOL = 12 mA
VIL = Max
IOL = Max
VIH = Min
VCC = Max
VO = 2.7V
VIL = Max
VIH = Min
VO = 0.4V
II
Input Current at Maximum
Input Voltage
VCC = Max
VI = 7V
IIH
HIGH Level Input Current
IIL
LOW Level Input Current
IOS
Short Circuit Output Current
ICC
Supply Current
VCC = Max
VCC = Max
VCC = Max (Note 3)
VCC = Max,
Outputs Open
VI = 2.7V
VI = 0.4V
−0.5
−40
Outputs HIGH
Outputs LOW
Outputs Disabled
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.
Max
5.25
0.8
−15
24
70
Typ
(Note 2)
0.4
3.4
13
27
32
Units
V
V
V
mA
mA
°C
Max
Units
−1.5
V
V
V
0.4
0.5
V
20
µA
−20
µA
0.1
mA
20
µA
−200
µA
−225
mA
23
46
mA
54
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