Datasheet

Complete, Isolated RS-485/RS-422
Data Interface
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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)
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.
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
MAX1480A/B/C/MAX1490A/B
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
f
SWL
V
FS
= 0V 535
Switch Frequency
f
SWH
FS = V
CC_
or open 725
kHz
R
L
= ∞, +25°C only 60 90
MAX1480A,
DE´ = V
CC_
or open
R
L
= 54Ω 120
R
L
= ∞, +25°C only 35 45
MAX1480B,
DE´ = V
CC_
or open
R
L
= 54Ω 95
R
L
= ∞, +25°C only 35 75
MAX1480C,
DE´ = V
CC_
or open
R
L
= 54Ω 95
R
L
= ∞, +25°C only 100 150
MAX1490A
R
L
= 54Ω 170
R
L
= ∞, +25°C only 65 125
Operating Supply Current I
CC
MAX1490B
R
L
= 54Ω 130
mA
Shutdown Supply Current
(Note 3)
I
SHDN
SD = V
CC_
0.2 µA
V
SDH
High 2.4
Shutdown Input Threshold
V
SDL
Low 0.8
V
Shutdown Input Leakage Current 10 pA
V
FSH
High 2.4
FS Input Threshold
V
FSL
Low 0.8
V
FS Input Pullup Current FS low 50 µA
FS Input Leakage Current FS high 10 pA
Input High Voltage V
IH
DE´, DI´ V
CC_
- 0.4 V
Input Low Voltage V
IL
DE´, DI´ 0.4 V
Isolation Resistance R
ISO
T
A
= +25°C, V
ISO
= 50VDC 100 10,000 MΩ
Isolation Capacitance C
ISO
T
A
= +25°C, V
ISO
= 50VDC 10 pF
Differential Driver Output
(No Load)
V
OD1
8V