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DS36C278 Datasheet(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. DS36C278
Description  Low Power Multipoint EIA-RS-485 Transceiver
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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DS36C278 Datasheet(HTML) 2 Page - National Semiconductor (TI)

 
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Absolute Maximum Ratings (Note 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (V
CC)
+12V
Input Voltage (DE, RE*, & DI)
−0.5V to (V
CC +0.5V)
Common Mode (V
CM)
Driver Output/Receiver Input
±15V
Input Voltage (DO/RI, DO*/RI*)
±14V
Receiver Output Voltage
−0.5V to (V
CC +0.5V)
Maximum Package Power Dissipation
@ +25˚C
M Package 1190 mW, derate
9.5 mW/˚C above
+25˚C
N Package 744 mW, derate
6.0 mW/˚C above
+25˚C
Storage Temperature Range
−65˚C to +150˚C
Lead Temperature
(Soldering 4 sec)
+260˚C
Recommended Operating
Conditions
Min
Typ
Max
Units
Supply Voltage (V
CC)
+4.75
+5.0
+5.25
V
Bus Voltage
−7
+12
V
Operating Free Air Temperature (Ta)
DS36C278T
−40
25
+85
˚C
DS36C278
0
25
+70
˚C
Electrical Characteristics (Notes 3, 4)
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified
Symbol
Parameter
Conditions
Reference
Min
Typ
Max
Units
DIFFERENTIAL DRIVER CHARACTERISTICS
V
OD1
Differential Output Voltage
I
O = 0 mA (No Load)
(422)
(485)
1.5
5.0
V
V
OD0
Output Voltage
I
O = 0 mA
0
5.0
V
V
OD0*
Output Voltage
(Output to GND)
0
5.0
V
V
OD2
Differential Output Voltage
R
L =50
(422)
Figure 1
2.0
2.8
V
(Termination Load)
R
L =27
(485)
1.5
2.3
5.0
V
∆V
OD2
Balance of V
OD2
R
L =27
Ω or 50Ω
(Note 5)
−0.2
0.1
+0.2
V
|V
OD2 −V0D2*|
(422, 485)
V
OD3
Differential Output Voltage
(Full Load)
R1=54
Ω,R2=375Ω
V
TEST = −7V to +12V
Figure 2
1.5
2.0
5.0
V
V
OC
Driver Common Mode
Output Voltage
R
L =27
(485)
Figure 1
0
3.0
V
R
L =50
(422)
0
3.0
V
∆V
OC
Balance of V
OC
|V
OC −VOC*|
R
L =27
Ω or
R
L =50
(Note 5)
(422, 485)
−0.2
+0.2
V
I
OSD
Driver Output Short-Circuit
Current
V
O = +12V
(485) Figure 4
200
+250
mA
V
O = −7V
(485)
−190
−250
mA
RECEIVER CHARACTERISTICS
V
TH
Differential Input High
Threshold Voltage
V
O =VOH,IO = −0.4V
−7V
≤ V
CM
≤ +12V
(Note 6)
(422, 485)
+0.035
+0.2
V
V
TL
Differential Input Low
Threshold Voltage
V
O =VOL,IO = 0.4 mA
−7V
≤ V
CM
≤ +12V
−0.2
−0.035
V
V
HST
Hysteresis
V
CM = 0V
(Note 7)
70
mV
R
IN
Input Resistance
−7V
≤ V
CM
≤ +12V
DS36C278T
24
68
k
R
IN
Input Resistance
−7V
≤ V
CM
≤ +12V
DS36C278
48
68
k
I
IN
Line Input Current
Other Input = 0V,
DS36C278
V
IN = +12V
0
0.19
0.25
mA
(Note 8)
DE = V
IL,RE*=VIL,VIN = −7V
0
−0.1
−0.2
mA
V
CC= 4.75 to 5.25
DS36C278T
V
IN = +12V
0
0.19
0.5
mA
or 0V
V
IN = −7V
0
−0.1
−0.4
mA
I
ING
Line Input Current Glitch
Other Input = 0V,
DS36C278
V
IN = +12V
0
0.19
0.25
mA
(Note 8)
DE = V
IL,RE*=VIL,VIN = −7V
0
−0.1
−0.2
mA
V
CC = +3.0V or 0V,
DS36C278T
V
IN = +12V
0
0.19
0.5
mA
T
A = 25˚C
V
IN = −7V
0
−0.1
−0.4
mA
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