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DS485M Datasheet(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # DS485M
Description  Low Power RS-485/RS-422 Multipoint Transceiver
PDF  10 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

DS485M Datasheet(HTML) 2 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)
+12V
Enable Input Voltage (RE*, DE)
−0.5V to (V
CC + 0.5V)
Driver Input Voltage (DI)
−0.5V to (V
CC + 0.5V)
Driver Output Voltage (A, B)
−14V to +14V
Receiver Input Voltage (A, B)
−14V to +14V
Receiver Output Voltage (RO)
−0.5V to (V
CC + 0.5V)
Maximum Package Power Dissipation @ +25˚C
M Package
1.19W
N Package
0.74W
Derate M Package 9.5 mW/˚C above +25˚C
Derate N Package 6.0 mW/˚C above +25˚C
Maximum Package Power Dissipation @ +70˚C
M Package
0.76W
N Package
0.47W
Storage Temperature Range
−65˚C to +150˚C
Lead Temperature Range
(Soldering, 4 sec.)
+260˚C
ESD (HBM)
≥2kV
Recommended Operating
Conditions
Min
Typ
Max
Units
Supply Voltage (V
CC)
+4.75
+5.0
+5.25
V
Operating Free Air
Temperature (T
A)
DS485
0
+25
+70
˚C
DS485T
−40
+25
+85
˚C
Bus Common Mode Voltage
−7
+12
V
Electrical Characteristics
Over Supply Voltage and Operating Temperature Ranges, unless otherwise specified (Notes 2, 3)
Symbol
Parameter
Conditions
Pin
Min
Typ
Max
Units
V
OD1
Differential Driver Output Voltage
(No Load)
A, B
5
V
V
OD2
Differential Driver Output Voltage
R
L = 50Ω, (RS422), Figure 1
2
2.8
V
with Load
R
L = 27Ω, (RS485), Figure 1
1.5
2.3
5
V
∆V
OD
Change in Magnitude of Output
R
L = 27Ω or 50Ω (Note 4)
0.2
|V|
Differential Voltage
V
OD3
Differential Driver Output Voltage —
R1 = 54
Ω,R2 = 375Ω
1.5
2.0
5
V
Full Load with Max V
CM
V
TEST = −7V to +12V, Figure 5
V
OC
Driver Common-Mode Output Voltage
R
L = 27Ω or 50Ω, Figure 1
3V
∆V
OC
Change in Magnitude of Common-Mode
R
L = 27Ω or 50Ω, Figure 1 (Note 4)
0.2
|V|
Output Voltage
V
IH
Input High Voltage
DI,
DE,
RE*
2.0
V
V
IL
Input Low Voltage
0.8
V
I
IN1
Input Current
V
IN = 0V or VCC
±2µA
I
IN2
Input Current (Note 5)
V
IN = +12V
A, B
1.0
mA
DE = 0V, V
CC = 0V or 5.25V
V
IN = −7V
−0.8
mA
V
TH
Receiver Differential Threshold Voltage
−7V
≤ V
CM ≤ +12V
−0.2
0.2
V
∆V
TH
Receiver Input Hysteresis
V
CM = 0V
70
mV
V
OH
Receiver Output High Voltage
I
O = −4 mA, VID = 0.2V
RO
3.5
V
V
OL
Receiver Output Low Voltage
I
O = 4 mA, VID = −0.2V
0.4
V
I
OZR
TRI-STATE Output Current at Receiver
0.4V
≤ V
O ≤ 2.4V
±1µA
R
IN
Receiver Input Resistance
−7V
≤ V
IN ≤ +12V
A, B
12
k
Ω
I
CC
No-Load Supply Current (Note 6)
DE = V
CC,RE* = 0V or VCC
V
CC
200
900
µA
DE = 0V, RE* = 0V or V
CC
200
500
µA
I
OSD1
Driver Short Circuit Current, V
O = HIGH
−7V
≤ V
O ≤ +12V
A, B
35
250
mA
I
OSD2
Driver Short Circuit Current, V
O = LOW
−7V
≤ V
O ≤ +12V
35
250
mA
I
OSR
Receiver Short Circuit Current
0V
≤ V
O ≤ VCC
RO
7
85
mA
www.national.com
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