74LS245 Datasheet, PDF (2/6 Pages) National Semiconductor (TI) – TRI-STATE Octal Bus Transceiver

Absolute Maximum Ratings (Note)
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Supply Voltage
7V
Input Voltage
DIR or G
7V
A or B
5 5V
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
I_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
DM54LS245
Nom
5
Max
55
07
b12
12
125
DM74LS245
Min
Nom
Max
4 75
5
5 25
2
08
b15
24
0
70
Units
V
V
V
mA
mA
C
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
V_I
HYS
V_OH
V_OL
Input Clamp Voltage
Hysteresis (V_Ta b V_Tb)
High Level Output Voltage
Low Level Output Voltage
V_CC e Min I_I e b18 mA
V_CC e Min
V_CC e Min V_IH e Min
V_IL e Max I_OH e b1 mA
V_CC e Min V_IL e Min
V_IL e Max I_OH e b3 mA
V_CC e Min V_IH e Min
V_IL e 0 5V I_OH e Max
V_CC e Min
V_IL e Max
V_IH e Min
I_OL e 12 mA
I_OL e Max
DM74
DM54 DM74
DM54 DM74
DM74
DM54
DM74
I_OZH
I_OZL
Off-State Output Current
High Level Voltage Applied
Off-State Output Current
Low Level Voltage Applied
V_CC e Max
V_IL e Max
V_IH e Min
V_O e 2 7V
V_O e 0 4V
I_I
Input Current at Maximum
V_CC e Max A or B
V_I e 5 5V
Input Voltage
DIR or G
V_I e 7V
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)
I_CC
Supply Current
Outputs High
V_CC e Max
Outputs Low
Outputs at Hi-Z
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 not to exceed one second duration
Min
02
27
24
2
b40
Typ
(Note 1)
04
34
48
62
64
Max
b1 5
04
04
05
20
b200
01
01
20
b0 2
b225
70
90
95
Units
V
V
V
V
mA
mA
mA
mA
mA
mA
mA
2