Complete, Isolated RS-485/RS-422
Data Interface
MAX1480A/B/C/MAX1490A/B
ABSOLUTE MAXIMUM RATINGS
With Respect to GND_
Supply Voltage (V
CC_
)...........................................-0.3V to +6V
Control Input Voltage (SD, FS)...............-0.3V to (V
CC_
+ 0.3V)
Receiver Output Voltage (RO, RO)........-0.3V to (V
CC_
+ 0.3V)
Output Switch Voltage (D1, D2)........................................+12V
With Respect to ISO COM_
Control Input Voltage (ISO DE_ ) ....-0.3V to (ISO V
CC_
+ 0.3V)
Driver Input Voltage (ISO DI_ ) .......-0.3V to (ISO V
CC_
+ 0.3V)
Receiver Output Voltage (ISO RO_) ...-0.3V to (ISO V
CC_
+ 0.3V)
Driver Output Voltage (A, B, Y, Z ) ......................-8V to +12.5V
Receiver Input Voltage (A, B)..............................-8V to +12.5V
LED Forward Current (DI, DE, ISO RO LED) ......................50mA
Continuous Power Dissipation (T
A
= +70°C)
24-Pin Plastic DIP (derate 8.7mW°C above +70°C) .....696mW
28-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ..727mW
Operating Temperature Ranges
MAX1480_CPI/MAX1490_CPG ............................0°C to +70°C
MAX1480_EPI/MAX1490_EPG .........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
CC_
= 5V ±10%, V
FS
= V
CC_
, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC_
= 5V and T
A
= +25°C.) (Notes 1, 2)
PARAMETER
Switch Frequency
SYMBOL
f
SWL
f
SWH
V
FS
= 0V
FS = V
CC_
or open
MAX1480A,
DE´ = V
CC_
or open
MAX1480B,
DE´ = V
CC_
or open
Operating Supply Current
I
CC
MAX1480C,
DE´ = V
CC_
or open
MAX1490A
MAX1490B
Shutdown Supply Current
(Note 3)
Shutdown Input Threshold
Shutdown Input Leakage Current
FS Input Threshold
FS Input Pullup Current
FS Input Leakage Current
Input High Voltage
Input Low Voltage
Isolation Resistance
Isolation Capacitance
Differential Driver Output
(No Load)
V
IH
V
IL
R
ISO
C
ISO
V
OD1
V
FSH
V
FSL
High
Low
FS low
FS high
DE´, DI´
DE´, DI´
T
A
= +25°C, V
ISO
= 50VDC
T
A
= +25°C, V
ISO
= 50VDC
100
10,000
10
8
V
CC_
- 0.4
0.4
10
2.4
0.8
50
I
SHDN
V
SDH
V
SDL
SD = V
CC_
High
Low
10
2.4
0.8
R
L
=
∞,
+25°C only
R
L
= 54Ω
R
L
=
∞,
+25°C only
R
L
= 54Ω
R
L
=
∞,
+25°C only
R
L
= 54Ω
R
L
=
∞,
+25°C only
R
L
= 54Ω
R
L
=
∞,
+25°C only
R
L
= 54Ω
CONDITIONS
MIN
TYP
535
725
60
120
35
95
35
95
100
170
65
130
0.2
µA
V
pA
V
µA
pA
V
V
MΩ
pF
V
125
150
75
mA
45
90
MAX
UNITS
kHz
2
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
