74LS155 Datasheet, PDF (2/8 Pages) National Semiconductor (TI) – Dual 2-Line to 4-Line Decoders/Demultiplexers

Absolute Maximum Ratings (Note)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage
7V
Input Voltage
7V
Operating Free Air Temperature Range
DM54LS and 54LS
b55 C to a125 C
DM74LS
0 C to a70 C
Storage Temperature Range
b65 C to a150 C
Note The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaran-
teed The device should not be operated at these limits The
parametric values defined in the ‘‘Electrical Characteristics’’
table are not guaranteed at the absolute maximum ratings
The ‘‘Recommended Operating Conditions’’ table will define
the conditions for actual device operation
Recommended Operating Conditions
Symbol
V_CC
V_IH
V_IL
V_OH
I_OL
T_A
Parameter
Supply Voltage
High Level Input Voltage
Low Level Input Voltage
High Level Output Current
Low Level Output Current
Free Air Operating Temperature
Min
45
2
b55
DM54LS155
Nom
Max
5
55
07
b0 4
4
125
DM74LS155
Min
Nom
Max
4 75
5
5 25
2
08
b0 4
8
0
70
Units
V
V
V
mA
mA
C
’LS155 Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
V_I
Input Clamp Voltage
V_CC e Min I_I e b18 mA
V_OH
High Level Output
Voltage
V_CC e Min I_OH e Max
DM54
25
V_IL e Max V_IH e Min
DM74
27
V_OL
Low Level Output
Voltage
V_CC e Min I_OL e Max
V_IL e Max V_IH e Min
DM54
DM74
I_OL e 4 mA V_CC e Min
DM74
I_I
Input Current Max
V_CC e Max V_I e 7V
Input Voltage
I_IH
High Level Input Current
V_CC e Max V_I e 2 7V
I_IL
Low Level Input Current
V_CC e Max V_I e 0 4V
I_OS
Short Circuit
Output Current
V_CC e Max
(Note 2)
DM54
DM74
b20
b20
I_CC
Supply Current
V_CC e Max (Note 3)
Note 1 All typicals are at V_CC e 5V T_A e 25 C
Note 2 Not more than one output should be shorted at a time and the duration should not exceed one second
Note 3 I_CC is measured with all outputs open A B and C1 inputs at 4 5V and C2 G1 and G2 inputs grounded
Typ
(Note 1)
34
34
0 25
0 35
0 25
61
Max
b1 5
04
05
04
01
20
b0 36
b100
b100
10
Units
V
V
V
mA
mA
mA
mA
mA
2