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DM74LS155 Datasheet(PDF) 3 Page - Fairchild Semiconductor

Part No. DM74LS155
Description  Dual 2-Line to 4-Line Decoders/Demultiplexers
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

DM74LS155 Datasheet(HTML) 3 Page - Fairchild Semiconductor

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Absolute Maximum Ratings(Note 3)
Note 3: 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.
DM74LS155 Recommended Operating Conditions
DM74LS155 Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Note 4: All typicals are at VCC = 5V, TA = 25° C.
Note 5: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 6: ICC is measured with all outputs OPEN, A,B, and C1 inputs at 4.5V, and C2, G1, and G2 inputs GROUNDED.
DM74LS155 Switching Characteristics
at VCC = 5V and TA = 25°C
Supply Voltage
7V
Input Voltage
7V
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
VOH
HIGH Level Output Current
−0.4
mA
IOL
LOW Level Output Current
8
mA
TA
Free Air Operating Temperature
0
70
°C
Symbol
Parameter
Conditions
Min
Typ
Max
Units
(Note 4)
VI
Input Clamp Voltage
VCC = Min, II = −18 mA
−1.5
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
0.35
0.5
Output Voltage
VIL = Max, VIH = Min
V
IOL = 4 mA, VCC = Min
0.25
0.4
II
Input Current @ Max Input Voltage
VCC = Max, VI = 7V
0.1
mA
IIH
HIGH Level Input Current
VCC = Max, VI = 2.7V
20
µA
IIL
LOW Level Input Current
VCC = Max, VI = 0.4V
−0.36
mA
IOS
Short Circuit Output Current
VCC = Max (Note 5)
−20
−100
mA
ICC
Supply Current
VCC = Max (Note 6)
6.1
10
mA
From (Input)
RL = 2 kΩ
Symbol
Parameter
To (Output)
CL = 15 pF
CL = 50 pF
Units
Min
Max
Min
Max
tPLH
Propagation Delay Time
A, B, C2, G1
18
22
ns
LOW-to-HIGH Level Output
or G2 to Y
tPHL
Propagation Delay Time
A, B, C2, G1
27
35
ns
HIGH-to-LOW Level Output
or G2 to Y
tPLH
Propagation Delay Time
A or B
18
24
ns
LOW-to-HIGH Level Output
to Y
tPHL
Propagation Delay Time
A or B
27
35
ns
HIGH-to-LOW Level Output
to Y
tPLH
Propagation Delay Time
C1
20
24
ns
LOW-to-HIGH Level Output
to Y
tPHL
Propagation Delay Time
C1
27
35
ns
HIGH-to-LOW Level Output
to Y


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