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DM74LS138N View Datasheet(PDF) - Fairchild Semiconductor

Part NameDescriptionManufacturer
DM74LS138N Decoder/Demultiplexer Fairchild
Fairchild Semiconductor Fairchild
DM74LS138N Datasheet PDF : 7 Pages
1 2 3 4 5 6 7
DM74LS139 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
4.75
2
Nom
5
0
DM74LS139 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,
2.7
VIL = Max, VIH = Min
VOL
LOW Level
VCC = Min, IOL = Max
Output Voltage
VIL = Max, VIH = Min
IOL = 4 mA, VCC = Min
II
Input Current @ Max Input Voltage
VCC = Max, VI = 7V
IIH
HIGH Level Input Current
VCC = Max, VI = 2.7V
IIL
LOW Level Input Current
VCC = Max, VI = 0.4V
IOS
Short Circuit Output Current
VCC = Max (Note 7)
20
ICC
Supply Current
VCC = Max (Note 8)
Note 6: All typicals are at VCC = 5V, TA = 25°C.
Note 7: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 8: ICC is measured with all outputs enabled and OPEN.
Max
Units
5.25
V
V
0.8
V
0.4
mA
8
mA
70
°C
Typ
Max
(Note 6)
1.5
3.4
0.35
0.5
0.25
0.4
0.1
20
0.36
100
6.8
11
Units
V
V
V
mA
µA
mA
mA
mA
DM74LS139 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
Select to Output
Select to Output
Enable to Output
Enable to Output
RL = 2 k
CL = 15 pF
CL = 50 pF
Min
Max
Min
Max
18
27
27
40
18
27
24
40
Units
ns
ns
ns
ns
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