National DS36C278 Home Security System User 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
Cto
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
50X (422)
Figure 1
20 28 V
(Termination Load)
R
L
e
27X (485) 15 23 50 V
DV
OD2
Balance of V
OD2
R
L
e
27X or 50X (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
54XR2
e
375X
Figure 2
15 20 50 V
(Full Load) V
TEST
eb
7V to
a
12V
V
OC
Driver Common Mode R
L
e
27X (485)
Figure 1
0 30 V
Output Voltage
R
L
e
50X (422) 0 30 V
DV
OC
Balance of V
OC
R
L
e
27X or (Note 4)
b
02
a
02 V
l
V
OC
b
V
OC
l
R
L
e
50X (422 485)
I
OSD
Driver Output Short-Circuit V
O
ea
12V (485)
Figure 4
200
a
250 mA
Current
V
O
eb
7V (485)
b
190
b
250 mA
RECEIVER CHARACTERISTICS
V
TH
Differential Input High V
O
e
V
OH
I
O
eb
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 kX
R
IN
Input Resistance
b
7V
s
V
CM
s
a
12V DS36C278 48 68 kX
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