National Semiconductor DS36C278 s and, Specifications And Installation Manual

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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
)
a
12V
Input Voltage (DE, RE * , & DI)
b
0.5V to (V
CC
a
0.5V)
Common Mode (V
CM
)
Driver Output/Receiver Input
g
15V
Input Voltage (DO/RI, DO * /RI * )
g
14V
Receiver Output Voltage
b
0.5V to (V
CC
a
0.5V)
Maximum Package Power Dissipation
@
a
25 § C
M Package 1190 mW, derate 9.5 mW/ § C above
a
25 § C
N Package 744 mW, derate 6.0 mW/ § C above
a
25 § C
Storage Temperature Range
b
65 § C to
a
150 § C
Lead Temperature (Soldering 4 sec)
a
260 § C
Recommended Operating
Conditions
Min Typ Max Units
Supply Voltage (V
CC
)
a
4.75
a
5.0
a
5.25 V
Bus Voltage
b
7
a
12 V
Operating Free Air Temperature (Ta)
DS36C278T
b
40 25
a
85 § C
DS36C278 0 25
a
70 § C
Electrical Characteristics
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (Notes 2 and 3)
Symbol Parameter Conditions Reference Min Typ Max Units
DIFFERENTIAL DRIVER CHARACTERISTICS
V
OD1
Differential Output Voltage I
O
e
0 mA (No Load)
(485)
(422)
1.5 5.0 V
V
OD0
Output Voltage I
O
e
0 mA 0 5.0 V
V
OD0 *
Output Voltage (Output to GND) 0 5.0 V
V
OD2
Differential Output Voltage R
L
e
50 X (422)
Figure 1
2.0 2.8 V
(Termination Load)
R
L
e
27 X (485) 1.5 2.3 5.0 V
D V
OD2
Balance of V
OD2
R
L
e
27 X or 50 X (Note 4)
b
0.2 0.1
a
0.2 V
l
V
OD2
b
V
OD2 *
l
(422, 485)
V
OD3
Differential Output Voltage R1
e
54 X , R2
e
375 X
Figure 2 1.5 2.0 5.0 V
(Full Load) V
TEST
e b
7V to
a
12V
V
OC
Driver Common Mode R
L
e
27 X (485)
Figure 1
0 3.0 V
Output Voltage
R
L
e
50 X (422) 0 3.0 V
D V
OC
Balance of V
OC
R
L
e
27 X or (Note 4)
b
0.2
a
0.2 V
l
V
OC
b
V
OC *
l
R
L
e
50 X (422, 485)
I
OSD
Driver Output Short-Circuit V
O
e a
12V (485) Figure 4 200
a
250 mA
Current
V
O
e b
7V (485)
b
190
b
250 mA
RECEIVER CHARACTERISTICS
V
TH
Differential Input High V
O
e
V
OH
, I
O
e b
0.4V
(422, 485)
(Note 5)
a
0.035
a
0.2 V
Threshold Voltage
b
7V
s
V
CM
s a
12V
V
TL
Differential Input Low V
O
e
V
OL
, I
O
e
0.4 mA
b
0.2
b
0.035 V
Threshold Voltage
b
7V
s
V
CM
s a
12V
V
HST
Hysteresis V
CM
e
0V (Note 6) 70 mV
R
IN
Input Resistance
b
7V
s
V
CM
s a
12V DS36C278T 24 68 k X
R
IN
Input Resistance
b
7V
s
V
CM
s a
12V DS36C278 48 68 k X
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