Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V ).............................................................12V
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
CC
Control Input Voltage (RE, DE)...................-0.5V to (V
Driver Input Voltage (DI).............................-0.5V to (V
Driver Output Voltage (A, B)...................................-8V to +12.5V
Receiver Input Voltage (A, B).................................-8V to +12.5V
+ 0.5V)
+ 0.5V)
CC
CC
Receiver Output Voltage (RO).....................-0.5V to (V
+0.5V)
MAX4_ _C_ _/MAX1487C_ A ...............................0°C to +70°C
MAX4_ _E_ _/MAX1487E_ A.............................-40°C to +85°C
MAX4_ _MJ_/MAX1487MJA ...........................-55°C to +125°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
CC
Continuous Power Dissipation (T = +70°C)
A
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
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.
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 5V 5ꢀ, T = T
to T
, unless otherwise noted.) (Notes 1, 2)
MAX
A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Differential Driver Output (no load)
V
OD1
5
V
R = 50Ω (RS-422)
2
Differential Driver Output
(with load)
V
OD2
V
R = 27Ω (RS-485), Figure 4
1.5
5
Change in Magnitude of Driver
Differential Output Voltage for
Complementary Output States
∆V
R = 27Ω or 50Ω, Figure 4
R = 27Ω or 50Ω, Figure 4
R = 27Ω or 50Ω, Figure 4
0.2
V
V
V
OD
Driver Common-Mode Output
Voltage
V
3
OC
Change in Magnitude of Driver
Common-Mode Output Voltage
for Complementary Output States
∆V
0.2
OD
Input High Voltage
Input Low Voltage
Input Current
V
2.0
V
V
DE, DI, RE
DE, DI, RE
DE, DI, RE
DE = 0V;
IH
V
0.8
2
IL
I
µA
IN1
V
V
= 12V
= -7V
1.0
IN
V
= 0V or 5.25V,
CC
mA
all devices except
MAX487/MAX1487
Input Current
(A, B)
-0.8
IN
I
IN2
V
V
= 12V
= -7V
0.25
-0.2
IN
MAX487/MAX1487,
mA
V
DE = 0V, V
= 0V or 5.25V
CC
IN
Receiver Differential Threshold
Voltage
V
TH
-7V ≤ V
≤ 12V
-0.2
3.5
0.2
CM
Receiver Input Hysteresis
∆V
V
= 0V
CM
70
mV
V
TH
Receiver Output High Voltage
Receiver Output Low Voltage
V
I
I
= -4mA, V = 200mV
ID
OH
O
O
V
= 4mA, V = -200mV
0.4
1
V
OL
ID
Three-State (high impedance)
Output Current at Receiver
I
0.4V ≤ V ≤ 2.4V
µA
kΩ
kΩ
OZR
O
-7V ≤ V
≤ 12V, all devices except
CM
12
48
MAX487/MAX1487
Receiver Input Resistance
R
IN
-7V ≤ V ≤ 12V, MAX487/MAX1487
CM
2
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
