DM74LS158MX View Datasheet(PDF) - Fairchild Semiconductor
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Description
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DM74LS158MX Datasheet PDF : 7 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.
DM74LS157 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
Max
4.75
5
5.25
2
0.8
−0.4
8
0
70
DM74LS157 Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
VI
Input Clamp Voltage
VCC = Min, II = −18 mA
VOH
HIGH Level Output Voltage
VCC = Min, IOH = Max, VIL = Max, VIH = Min
2.7
VOL
LOW Level
VCC = Min, IOL = Max, VIL = Max, VIH = Min
Output Voltage
IOL = 4 mA, VCC = Min
II
Input Current @ Max
VCC = Max
S or G
Input Voltage
VI = 7V
A or B
IIH
HIGH Level
VCC = Max
S or G
Input Current
VI = 2.7V
A or B
IIL
LOW Level
VCC = Max
S or G
Input Current
VI = 0.4V
A or B
IOS
Short Circuit Output Current
VCC = Max (Note 3)
−20
ICC
Supply Current
VCC = Max (Note 4)
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 4.5V applied to all inputs and all outputs OPEN.
Typ
(Note 2)
3.4
0.35
0.25
9.7
Max
−1.5
0.5
0.4
0.2
0.1
40
20
−0.8
−0.4
−100
16
DM74LS157 Switching Characteristics
at VCC = 5V and TA = 25°C
From (Input)
Symbol
Parameter
To (Output)
tPLH
Propagation Delay Time
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
HIGH-to-LOW Level Output
tPLH
Propagation Delay Time
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
HIGH-to-LOW Level Output
tPLH
Propagation Delay Time
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
HIGH-to-LOW Level Output
Data to Y
Data to Y
Strobe to Y
Strobe to Y
Select to Y
Select to Y
RL = 2 kΩ
CL = 15 pF
CL = 50 pF
Min
Max
Min
Max
14
18
14
23
20
24
21
30
23
28
27
32
Units
V
V
V
mA
mA
°C
Units
V
V
V
mA
µA
mA
mA
mA
Units
ns
ns
ns
ns
ns
ns
3
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