Datasheet

mA
MAX1480E/MAX1490E
±15kV ESD-Protected, Isolated RS-485/RS-422
Data Interfaces
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
MAX1480E_CPI/MAX1490E_CPI ........................0°C to +70°C
MAX1480E_EPI/MAX1490E_EPI......................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Operating Supply Current I
CC
1.5 5R = 27Ω (RS-485), Figure 4
R = 50Ω (RS-422)
V
2
V
OD2
Differential Driver Output
(with Load)
V
FS
= 0
CONDITIONS
535f
SWL
UNITSMIN TYP MAXSYMBOLPARAMETER
FS = V
CC_
or open 725f
SWH
85 120
55 120
MAX1480EA,
DE
´ = V
CC_
or open
145
130
Low
V
0.8V
SDL
MAX1480EC,
DE
´ = V
CC_
or open
Shutdown Input Threshold
SD = V
CC_
High
µA0.2I
SHDN
Shutdown Supply Current
(Note 3)
2.4V
SDH
120
65 125
High
Low
2.4V
FSH
V
0.8V
FSL
FS Input Threshold
DE´, DI´, Figures 1 and 2
DE´, DI´, Figures 1 and 2
VV
CC
- 0.4V
IH
Input High Voltage
V0.4V
IL
Input Low Voltage
FS low
FS high
µA50FS Input Pullup Current
pA10FS Input Leakage Current
pA10
Shutdown Input Leakage
Current
R
L
= ∞
R
L
= 54Ω
R
L
= ∞
R
L
= 54Ω
R
L
= ∞
MAX1490EB
R
L
= 54Ω
T
A
= +25°C, f = 1MHz pF10C
ISO
Isolation Capacitance
T
A
= +25°C, V
ISO
= 50VDC MΩ100 10,000R
ISO
Isolation Resistance
kHzSwitch Frequency
mA
R
L
= ∞
R
L
= 54Ω
130 180
MAX1490EA
180
V8V
OD1
Differential Driver Output
(No Load)
T
A
= +25°C, 1min (Note 4) V
RMS
1260V
ISO
Isolation Voltage