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DM74S157 Scheda tecnica(PDF) 3 Page - Fairchild Semiconductor

Il numero della parte DM74S157
Spiegazioni elettronici  Quad 1 of 2 Line Data Selector/Multiplexer
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Produttore elettronici  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

DM74S157 Scheda tecnica(HTML) 3 Page - 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.
DM74157 Recommended Operating Conditions
DM74S157 Electrical Characteristics
over recommended operating free air temperature (unless otherwise noted)
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 4.5V applied to all inputs and all outputs OPEN.
DM74S157 Switching Characteristics
at VCC = 5V and TA = 25°C
Supply Voltage
7V
Input Voltage
5.5V
Operating Free Air Temperature Range
0
°C to +70°C
Storage Temperature Range
−65°C to +150°C
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
−1mA
IOL
LOW Level Output Current
20
mA
TA
Free Air Operating Temperature
0
70
°C
Symbol
Parameter
Conditions
Min
Typ
Max
Units
(Note 2)
VI
Input Clamp Voltage
VCC = Min, II = −18 mA
−1.2
V
VOH
HIGH Level
VCC = Min, IOH = Max
2.7
3.4
V
Output Voltage
VIL = Max, VIH = Min
VOL
LOW Level
VCC = Min, IOL = Max
0.5
V
Output Voltage
VIH = Min, VIL = Max
II
Input Current @ Max Input Voltage VCC = Max, VI = 5.5V
1
mA
IIH
HIGH Level
VCC = Max
S or G
100
µA
Input Current
VI = 2.7V
A or B
50
IIL
HIGH Level
VCC = Max
S or G
−4
mA
Input Current
VI = 0.5V
A or B
−2
IOS
Short Circuit Output Current
VCC = Max (Note 3)
−40
−100
mA
ICC
Supply Current
VCC = Max (Note 4)
50
78
mA
RL = 280Ω
Symbol
Parameter
From (Input)
CL = 15 pF
CL = 50 pF
Units
To (Output)
Min
Max
Min
Max
tPLH
Propagation Delay Time
Data to Y
7.5
10
ns
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
Data to Y
6.5
10
ns
HIGH-to-LOW Level Output
tPLH
Propagation Delay Time
Strobe to Y
12.5
15
ns
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
Strobe to Y
12
15
ns
HIGH-to-LOW Level Output
tPLH
Propagation Delay Time
Select to Y
15
17
ns
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
Select to Y
15
17
ns
HIGH-to-LOW Level Output


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