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DM74AS257N Arkusz danych(PDF) 3 Page - Fairchild Semiconductor

Numer części DM74AS257N
Szczegółowy opis  3-STATE Quad 1 of 2 Line Data Selector/Multiplexers
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Producent  FAIRCHILD [Fairchild Semiconductor]
Strona internetowa  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

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Absolute Maximum Ratings(Note 1)
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
Electrical Characteristics
over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C.
Note 2: The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
Supply Voltage, VCC
7V
Input Voltage
7V
Voltage Applied to Disabled Output
5.5V
Operating Free Air Temperature Range
0
°C to +70°C
Storage Temperature Range
−65°C to +150°C
Typical
θ
JA
N Package
75.0
°C/W
Symbol
Parameter
Min
Nom
Max
Units
VCC
Supply Voltage
4.5
5
5.5
V
VIH
HIGH Level Input Voltage
2
V
VIL
LOW Level Input Voltage
0.8
V
IOH
HIGH Level Output Current
−15
mA
IOL
LOW Level Output Current
48
mA
TA
Free Air Operating Temperature
0
70
°C
Symbol
Parameter
Conditions
Min
Typ
Max
Units
VIK
Input Clamp
VCC = 4.5V, II = −18 mA
−1.2
V
Voltage
VOH
HIGH Level
VCC = 4.5V, IOH = Max
2.4
3.2
V
Output Voltage
IOH = −2 mA, VCC = 4.5V to 5.5V
VCC − 2V
VOL
LOW Level
VCC = 4.5V, IOL = Max
0.35
0.5
V
Output Voltage
II
Input Current @
VCC = 5.5V, VIH = 7V
A, B, G
0.1
mA
Max Input Voltage
Select
0.2
IIH
HIGH Level
VCC = 5.5V, VIH = 2.7V
A, B, G
20
µA
Input Current
Select
40
IIL
LOW Level
VCC = 5.5V, VIL = 0.4V
Select
−1
mA
Input Current
All Others
−0.5
IO (Note 2) Output Drive Current
VCC = 5.5V, VO = 2.25V
−30
−112
mA
IOZH
Off-State Output Current,
VCC = 5.5V
−50
µA
HIGH Level Voltage Applied
VO = 2.7V
IOZL
Off-State Output Current,
VCC = 5.5V
−50
µA
LOW Level Voltage Applied
VO = 0.4V
ICCH
Supply
DM74AS257
Outputs HIGH
12.9
19.7
mA
Current
DM74AS258
8.8
13.5
mA
ICCL
Supply
DM74AS257
VCC = 5.5V
Outputs LOW
19
30.6
mA
Current
DM74AS258
Outputs Open
15.8
24.6
mA
ICCZ
Supply
DM74AS257
Outputs Disabled
19.7
31.9
mA
Current
DM74AS258
15.5
25.2
mA


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