mA
MAX1480E/MAX1490E
±15kV ESD-Protected, Isolated RS-485/RS-422
Data Interfaces
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VCC_ = +5V ±10%, VFS = VCC_, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC_ = +5V and TA = +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 (VCC_)..........................................-0.3V to +6V
Control Input Voltage (SD, FS)..............-0.3V to (VCC_ + 0.3V)
Receiver Output Voltage (RO, RO).......-0.3V to (VCC_ + 0.3V)
Output Switch Voltage (D1, D2).......................................+12V
With Respect to ISO COM_
Control Input Voltage (ISO DE_) ....-0.3V to (ISO VCC_ + 0.3V)
Driver Input Voltage (ISO DI_) .......-0.3V to (ISO VCC_ + 0.3V)
Receiver Output Voltage (ISO RO_) ..-0.3V to (ISO VCC_ + 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 (TA = +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
ICC
1.5
5
R = 27
(RS-485), Figure 4
R = 50
(RS-422)
V
2
VOD2
Differential Driver Output
(with Load)
VFS = 0
CONDITIONS
535
fSWL
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
FS = VCC_ or open
725
fSWH
85
120
55
120
MAX1480EA,
DE
= VCC_ or open
145
130
Low
V
0.8
VSDL
MAX1480EC,
DE
= VCC_ or open
Shutdown Input Threshold
SD = VCC_
High
A
0.2
ISHDN
Shutdown Supply Current
(Note 3)
2.4
VSDH
120
65
125
High
Low
2.4
VFSH
V
0.8
VFSL
FS Input Threshold
DE
, DI, Figures 1 and 2
DE
, DI, Figures 1 and 2
V
VCC - 0.4
VIH
Input High Voltage
V
0.4
VIL
Input Low Voltage
FS low
FS high
A
50
FS Input Pullup Current
pA
10
FS Input Leakage Current
pA
10
Shutdown Input Leakage
Current
RL =
∞
RL = 54
RL =
∞
RL = 54
RL =
∞
MAX1490EB
RL = 54
TA = +25°C, f = 1MHz
pF
10
CISO
Isolation Capacitance
TA = +25°C, VISO = 50VDC
M
100
10,000
RISO
Isolation Resistance
kHz
Switch Frequency
mA
RL =
∞
RL = 54
130
180
MAX1490EA
180
V
8
VOD1
Differential Driver Output
(No Load)
TA = +25°C, 1min (Note 4)
VRMS
1260
VISO
Isolation Voltage