DM74LS257BCW View Datasheet(PDF) - Fairchild Semiconductor
Part Name
Description
Manufacturer
DM74LS257BCW Datasheet PDF : 5 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
DC Electrical Characteristics
Min
Nom
Max
4.75
5
5.25
2
0.8
−2.6
24
0
70
Symbol
Parameter
Conditions
Typ
Min
(Note 2)
VI
Input Clamp Voltage
VCC = Min, II = −18 mA
VOH
HIGH Level Output Voltage
VIL = Max, VIH = Min
2.4
3.1
VOL
LOW Level Output
VIL = Max, VIH = Min
0.35
Voltage
IOL = 12 mA, VCC = Min
0.25
II
Input Current @ Max
VCC = Max,
Select
Input Voltage
VI = 7V
Other
IIH
HIGH Level Input
VCC = Max,
Select
Current
VI = 2.7V
Other
IIL
LOW Level Input
VCC = Max,
Select
Current
VI = 0.4V
Other
IOZH
OFF-State Output Current with
VCC = Max, VO = 2.7V
HIGH Level Output Voltage Applied VIH = Min, VIL = Max
IOZL
OFF-State Output Current with
VCC = Max, VO = 0.4V
LOW Level Output Voltage Applied VIH = Min, VIL = Max
IOS
Short Circuit Output Current
VCC = Max (Note 3)
−20
ICCH
Supply Current with Outputs HIGH VCC = Max (Note 4)
5.9
ICCL
Supply Current with Outputs LOW VCC = Max (Note 4)
9.2
ICCZ
Supply Current with Outputs Disabled VCC = Max (Note 4)
12
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.
Note 4: ICC is measured with all outputs open and all possible inputs grounded, while achieving the stated output conditions.
Max
−1.5
0.5
0.4
0.2
0.1
40
20
−0.8
−0.4
20
−20
−100
10
16
19
Units
V
V
V
mA
mA
°C
Units
V
V
V
mA
µA
mA
µA
µA
mA
mA
mA
mA
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