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LMS1485 Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LMS1485
Description  5V Low Power RS-485 Differential Bus Transceiver
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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LMS1485 Datasheet(HTML) 3 Page - National Semiconductor (TI)

 
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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage, V
CC (Note 2)
7V
Input Voltage, V
IN (DI, DE, or RE)
−0.3V to V
CC+ 0.3V
Voltage Range at Any Bus Terminal
(AB)
−7V to 12V
Receiver Outputs
−0.3V to V
CC + 0.3V
Package Thermal Impedance,
θ
JA
SOIC (Note 3)
125˚C/W
Junction Temperature (Note 3)
150˚C
Operating Free-Air Temperature
Range, T
A
Commercial
0˚C to 70˚C
Industrial
−40˚C to 85˚C
Storage Temperature Range
−65˚C to 150˚C
ESD Rating (Note 4) (Note 8)
8kV
ESD Rating (Note 4) (Note 9)
2kV
Soldering Information
Infrared or Convection (20 sec.)
235˚C
Operating Ratings
Min Nom Max
Supply Voltage, V
CC
4.75
5.0
5.25
V
Voltage at any Bus Terminal
(Separately or Common Mode)
−7
12
V
V
IN or VIC
High-Level Input Voltage, V
IH
(Note 5)
2V
Low-Level Input Voltage, V
IL
(Note 5)
0.8
V
Differential Input Voltage, V
ID
(Note 6)
±12
V
Electrical Characteristics
Over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Driver Section
V
OD
Differential Output Voltage
R =
∞ (Figure 1)5
V
V
OD1
Differential Output Voltage
R = 50
Ω (Figure 1), RS-422
2
5
V
V
OD2
Differential Output Voltage
R = 27
Ω (Figure 1), RS-485
1.5
5
V
V
OD3
Differential Output Voltage
V
TEST = −7V to + 12V (Figure 2)
1.5
5
V
∆V
OD
Change in Magnitude of
Differential Output Voltage
R=27
Ω or 50Ω (Figure 1 ), (Note 7)
−0.2
0.2
V
V
OC
Common-Mode Output
Voltage
R=27
Ω or 50Ω (Figure 1), (Note 7)
3
V
∆V
OC
Change in Magnitude of
Common-Mode Output
Voltage
R=27
Ω or 50Ω (Figure 1), (Note 7)
−0.2
0.2
V
I
OSD
Short-Circuit Output Current
V
O = High, −7V
≤V
CM
≤+12V
−250
250
mA
V
O = Low, −7V
≤V
CM
≤+12V
−250
250
V
INL
CMOS Input Logic Threshold
Low
DE, DI, RE
0.8
V
V
INH
CMOS Input Logic Threshold
High
DE, DI, RE
2V
I
IN
Logic Input Current
DE, DI
−1
1
µA
Receiver Section
V
TH
Differential Input Threshold
Voltage
−7V
≤ V
CM
≤ + 12V
−0.2
+0.2
V
∆V
TH
Input Hysteresis Voltage
(V
TH+ −VTH−)
V
CM = 0
70
mV
R
IN
Input Resistance
−7V
≤ V
CM
≤ + 12V
12
k
I
IN
Input Current (A, B)
V
IN = 12V
1
mA
V
IN = −7V
−0.8
I
RE
Logic Enable Input Current
RE
−1
1
µA
V
OL
CMOS Low-Level Output
Voltage
I
OL = 4mA
0.4
V
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