Datasheet

Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
2 Maxim Integrated
MAX481/MAX483/MAX485/
MAX487–MAX491/MAX1487
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
CC
).............................................................12V
Control Input Voltage (RE, DE)...................-0.5V to (V
CC
+ 0.5V)
Driver Input Voltage (DI).............................-0.5V to (V
CC
+ 0.5V)
Driver Output Voltage (A, B)...................................-8V to +12.5V
Receiver Input Voltage (A, B).................................-8V to +12.5V
Receiver Output Voltage (RO)....................-0.5V to (V
CC
+ 0.5V)
Continuous Power Dissipation (T
A
= +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ....727mW
14-Pin Plastic DIP (derate 10.00mW/°C above +70°C) ..800mW
8-Pin SO (derate 5.88mW/°C above +70°C).................471mW
14-Pin SO (derate 8.33mW/°C above +70°C)...............667mW
8-Pin µMAX (derate 4.1mW/°C above +70°C) ..............830mW
8-Pin CERDIP (derate 8.00mW/°C above +70°C).........640mW
14-Pin CERDIP (derate 9.09mW/°C above +70°C).......727mW
Operating Temperature Ranges
MAX4_ _C_ _/MAX1487C_ A ...............................0°C to +70°C
MAX4_ _E_ _/MAX1487E_ A.............................-40°C to +85°C
MAX4_ _M_/MAX1487MJA .............................-55°C to +125°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (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.
V
V
IN
= -7V
V
IN
= 12V
V
IN
= -7V
V
IN
= 12V
Input Current
(A, B)
I
IN2
V
TH
kΩ48-7V ≤ V
CM
≤ 12V, MAX487/MAX1487
R
IN
Receiver Input Resistance
-7V ≤ V
CM
≤ 12V, all devices except
MAX487/MAX1487
R = 27Ω (RS-485), Figure 4
0.4V ≤ V
O
≤ 2.4V
R = 50Ω (RS-422)
I
O
= 4mA, V
ID
= -200mV
I
O
= -4mA, V
ID
= 200mV
V
CM
= 0V
-7V ≤ V
CM
≤ 12V
DE, DI, RE
DE, DI, RE
MAX487/MAX1487,
DE = 0V, V
CC
= 0V or 5.25V
DE, DI, RE
R = 27Ω or 50Ω, Figure 4
R = 27Ω or 50Ω, Figure 4
R = 27Ω or 50Ω, Figure 4
DE = 0V;
V
CC
= 0V or 5.25V,
all devices except
MAX487/MAX1487
CONDITIONS
kΩ12
µA±1I
OZR
Three-State (high impedance)
Output Current at Receiver
V
0.4V
OL
Receiver Output Low Voltage
3.5V
OH
Receiver Output High Voltage
mV70ΔV
TH
Receiver Input Hysteresis
V-0.2 0.2
Receiver Differential Threshold
Voltage
-0.2
mA
0.25
mA
-0.8
1.0
1.5 5
V
OD2
Differential Driver Output
(with load)
V
2
V5V
OD1
Differential Driver Output (no load)
µA±2I
IN1
Input Current
V0.8V
IL
Input Low Voltage
V2.0V
IH
Input High Voltage
V0.2ΔV
OD
Change in Magnitude of Driver
Common-Mode Output Voltage
for Complementary Output States
V0.2ΔV
OD
Change in Magnitude of Driver
Differential Output Voltage for
Complementary Output States
V3V
OC
Driver Common-Mode Output
Voltage
UNITSMIN TYP MAXSYMBOLPARAMETER