lms485 National Semiconductor Corporation, lms485 Datasheet - Page 4

• Manufacturer Part Number: lms485
• Description: 5v Low Power Rs-485 / Rs-422 Differential Bus
• Manufacturer: National Semiconductor Corporation

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Driver Section
| V
| V
∆V
V
∆V
V
V
I
Receiver Section
I
V
∆V
IN1
IN2
Symbol
OC
IH
IL
TH
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics
Over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
Supply Voltage, V
Input Voltage, V
Voltage Range at Any Bus Terminal
(AB)
Receiver Outputs
Package Thermal Impedance, θ
Junction Temperature (Note 3)
Operating Free-Air Temperature
Range, T
Storage Temperature Range
Lead Temperature (4 sec.)
ESD Rating (Note 4)
OD1
OD2
OD
OC
TH
Soldering Information
SOIC
DIP
Commercial
Industrial
Infrared or Convection (20 sec.)
|
|
A
Differential Output Voltage
Differential Output Voltage
Change in Magnitude of
Driver Differential Output
Voltage for Complementary
Output States
Common-Mode Output
Voltage
Change in Magnitude of
Driver Common-Mode Output
Voltage for Complementary
Output States
CMOS Inout Logic Threshold
High
CMOS Input Logic Threshold
Low
Logic Input Current
Input Current (A, B)
Differential Input Threshold
Voltage
Input Hysteresis Voltage
(V
TH+
− V
IN
CC
(DI, DE, or RE)
Parameter
TH−
(Note 2)
)
JA
−0.3V to V
−0.3V to V
R =
R = 50Ω (Figure 1) ,RS-422
R = 27Ω (Figure 1) ,RS-485
R = 27Ω or 50Ω
(Figure 1 ), (Note 7)
R = 27Ω or 50Ω (Figure 1)
R = 27Ω or 50Ω
(Figure 1), (Note 7)
DE, DI, RE
DE, DI, RE
DE, DI, RE
DE = 0V, V
V
V
−7V ≤ V
V
IN
IN
CM
−65˚C to 150˚C
= 12V
= − 7V
∞
= 0
−40˚C to 85˚C
(Note 1)
(Figure 1)
0˚C to 70˚C
−7V to 12V
CM
CC
CC
125˚C/W
CC
≤ + 12V
88˚C/W
+ 0.3V
+ 0.3V
150˚C
235˚C
260˚C
Conditions
= 0V or 5.25V
7kV
7V
4
Operating Ratings
Supply Voltage, V
Voltage at any Bus Terminal
(Separately or Common Mode)
V
High-Level Input Voltage, V
(Note 5)
Low-Level Input Voltage, V
(Note 5)
Differential Input Voltage, V
(Note 6)
High-Level Output
Low-Level Output
IN
Driver, I
Driver, I
Receiver, I
Receiver, I
or V
IC
OH
OL
OL
OH
−0.2
Min
CC
2.0
1.5
2.0
IL
IH
ID
Typ
95
4.75 5.0 5.25
Min Nom Max
−7
2
Max
5.25
−0.8
+0.2
5.0
0.2
3.0
0.2
0.8
1.0
±
2
−150 mA
±
−42 mA
0.8
12
80
26
12
Units
mA
mA
V
V
V
V
V
mA
mV
µA
V
V
V
V
V
V
V
V