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MAX481ECPAMAXIMN/a31avai【15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers
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MAX481EESAMAXIM ?N/a82avai【15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers
MAX489EESDMAXIMN/a300avai【15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers


MAX481ECPA ,【15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceiversapplications that are not ESD sen-MAX481ECPA 0°C to +70°C 8 Plastic DIPsitive see the pin- and func ..
MAX481ECPA ,【15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 TransceiversApplicationsIndustrial-Control Local Area Networks__Selection TableRECEIVER/ QUIESCENT NUMBER OFPAR ..
MAX481ECPA+ ,±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 TransceiversApplications:ceivers on the bus. The MAX488E–MAX491E areMAX3483E/MAX3485E/MAX3486E/MAX3488E/designe ..
MAX481ECSA ,【15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 TransceiversELECTRICAL CHARACTERISTICS(V = 5V ±5%, T = T to T , unless otherwise noted.) (Notes 1, 2)CC A MIN M ..
MAX481ECSA ,【15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 TransceiversGeneral Description ________
MAX481ECSA ,【15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 TransceiversFeaturesThe MAX481E, MAX483E, MAX485E, MAX487E–MAX491E, ' ESD Protection: ±15kV—Human Body Modelan ..
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MAX8878EUK33 ,Low-Noise, Low-Dropout, 150mA Linear Regulators with '2982 Pinout
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MAX481ECPA-MAX481ECSA-MAX481EEPA-MAX481EESA-MAX489EESD
【15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers
_______________General Description
The MAX481E, MAX483E, MAX485E, MAX487E–MAX491E,
and MAX1487E are low-power transceivers for RS-485 and
RS-422 communications in harsh environments. Each driver
output and receiver input is protected against ±15kV electro-
static discharge (ESD) shocks, without latchup. These parts
contain one driver and one receiver. The MAX483E,
MAX487E, MAX488E, and MAX489E feature reduced slew-
rate drivers that minimize EMI and reduce reflections caused
by improperly terminated cables, thus allowing error-free
data transmission up to 250kbps. The driver slew rates of the
MAX481E, MAX485E, MAX490E, MAX491E, and MAX1487E
are not limited, allowing them to transmit up to 2.5Mbps.
These transceivers draw as little as 120µA supply current
when unloaded or when fully loaded with disabled drivers
(see Selection Table). Additionally, the MAX481E,
MAX483E, and MAX487E have a low-current shutdown
mode in which they consume only 0.5µA. All parts operate
from a single +5V supply.
Drivers are short-circuit current limited, and are protected
against excessive power dissipation by thermal shutdown
circuitry that places their outputs into a high-impedance
state. The receiver input has a fail-safe feature that guaran-
tees a logic-high output if the input is open circuit.
The MAX487E and MAX1487E feature quarter-unit-load
receiver input impedance, allowing up to 128 transceivers
on the bus. The MAX488E–MAX491E are designed for full-
duplex communications, while the MAX481E, MAX483E,
MAX485E, MAX487E, and MAX1487E are designed for half-
duplex applications. For applications that are not ESD sen-
sitive see the pin- and function-compatible MAX481,
MAX483, MAX485, MAX487–MAX491, and MAX1487.
________________________Applications

Low-Power RS-485 Transceivers
Low-Power RS-422 Transceivers
Level Translators
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
____________________________Features
ESD Protection: ±15kV—Human Body ModelSlew-Rate Limited for Error-Free Data
Transmission (MAX483E/487E/488E/489E)
Low Quiescent Current:
120µA (MAX483E/487E/488E/489E)
230µA (MAX1487E)
300µA (MAX481E/485E/490E/491E)
-7V to +12V Common-Mode Input Voltage RangeThree-State Outputs30ns Propagation Delays, 5ns Skew
(MAX481E/485E/490E/491E/1487E)
Full-Duplex and Half-Duplex Versions AvailableAllows up to 128 Transceivers on the Bus
(MAX487E/MAX1487E)
Current Limiting and Thermal Shutdown for
Driver Overload Protection
MAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E
±15kV ESD-Protected, Slew-Rate-Limited,
Low-Power, RS-485/RS-422 Transceivers
________________________________________________________________Maxim Integrated Products1
______________________________________________________________Selection Table

19-0410; Rev 3; 7/96
Ordering Information continued on last page.
& the latest literature: http://,
MAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E
±15kV ESD-Protected, Slew-Rate-Limited,
Low-Power, RS-485/RS-422 Transceivers_______________________________________________________________________________________

Supply Voltage (VCC).............................................................12V
Control Input Voltage (–R—E–, DE)...................-0.5V to (VCC+ 0.5V)
Driver Input Voltage (DI).............................-0.5V to (VCC+ 0.5V)
Driver Output Voltage (Y, Z; A, B)..........................-8V to +12.5V
Receiver Input Voltage (A, B).................................-8V to +12.5V
Receiver Output Voltage (RO)....................-0.5V to (VCC+ 0.5V)
Continuous Power Dissipation (TA= +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
Operating Temperature Ranges
MAX4_ _C_ _/MAX1487EC_ A.............................0°C to +70°C
MAX4__E_ _/MAX1487EE_ A...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec).............................+300°C
DC ELECTRICAL CHARACTERISTICS

(VCC= 5V ±5%, TA= TMINto TMAX, 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.
ABSOLUTE MAXIMUM RATINGS
MAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E
±15kV ESD-Protected, Slew-Rate-Limited,
Low-Power, RS-485/RS-422 Transceivers
SWITCHING CHARACTERISTICS—MAX481E/MAX485E, MAX490E/MAX491E, MAX1487E

(VCC= 5V ±5%, TA= TMINto TMAX, unless otherwise noted.) (Notes 1, 2)
DC ELECTRICAL CHARACTERISTICS (continued)

(VCC= 5V ±5%, TA= TMINto TMAX, unless otherwise noted.) (Notes 1, 2)
MAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E
±15kV ESD-Protected, Slew-Rate-Limited,
Low-Power, RS-485/RS-422 Transceivers_______________________________________________________________________________________
SWITCHING CHARACTERISTICS—MAX483E, MAX487E/MAX488E/MAX489E

(VCC= 5V ±5%, TA= TMINto TMAX, unless otherwise noted.) (Notes 1, 2)
SWITCHING CHARACTERISTICS—MAX481E/MAX485E, MAX490E/MAX491E, MAX1487E
(continued)

(VCC= 5V ±5%, TA= TMINto TMAX, unless otherwise noted.) (Notes 1, 2)
MAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E
±15kV ESD-Protected, Slew-Rate-Limited,
Low-Power, RS-485/RS-422 Transceivers
_______________________________________________________________________________________5

OUTPUT CURRENT vs.
RECEIVER OUTPUT LOW VOLTAGE

MAX481E-01
OUTPUT LOW VOLTAGE (V)
OUTPUT CURRENT (mA)
RECEIVER OUTPUT LOW VOLTAGE
vs. TEMPERATURE
MAX481E-04
TEMPERATURE (°C)
OUTPUT LOW VOLTAGE (V)100-4040080
OUTPUT CURRENT vs.
RECEIVER OUTPUT HIGH VOLTAGE
MAX481E-02
OUTPUT HIGH VOLTAGE (V)
OUTPUT CURRENT (mA)
RECEIVER OUTPUT HIGH VOLTAGE
vs. TEMPERATURE
MAX481E-03
TEMPERATURE (°C)
OUTPUT HIGH VOLTAGE (V)100-4040080
DRIVER OUTPUT CURRENT vs.
DIFFERENTIAL OUTPUT VOLTAGE

MAX481E-05
DIFFERENTIAL OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
__________________________________________Typical Operating Characteristics
(VCC= 5V, TA = +25°C, unless otherwise noted.)
NOTES FOR ELECTRICAL/SWITCHING CHARACTERISTICS
Note 1:
All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device
ground unless otherwise specified.
Note 2:
All typical specifications are given for VCC= 5V and TA= +25°C.
Note 3:
Supply current specification is valid for loaded transmitters when DE = 0V.
Note 4:
Applies to peak current. See Typical Operating Characteristics.
Note 5:
The MAX481E/MAX483E/MAX487E are put into shutdown by bringing–R—E–high and DE low. If the inputs are in this state for
less than 50ns, the parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 600ns, the parts are
guaranteed to have entered shutdown. See Low-Power Shutdown Modesection.
MAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E
±15kV ESD-Protected, Slew-Rate-Limited,
Low-Power, RS-485/RS-422 Transceivers_______________________________________________________________________________________
____________________________Typical Operating Characteristics (continued)

(VCC= 5V, TA = +25°C, unless otherwise noted.)
DRIVER DIFFERENTIAL OUTPUT
VOLTAGE vs. TEMPERATURE
MAX481E-06
TEMPERATURE (°C)
DIFFERENTIAL OUTPUT VOLTAGE (V)100-4040080
OUTPUT CURRENT vs.
DRIVER OUTPUT LOW VOLTAGE
MAX481E-07
OUTPUT LOW VOLTAGE (V)
OUTPUT CURRENT (mA)
OUTPUT CURRENT vs.
DRIVER OUTPUT HIGH VOLTAGE
MAX481E-08
OUTPUT HIGH VOLTAGE (V)
OUTPUT CURRENT (mA)42-6-40
MAX481E/MAX485E/MAX490E/MAX491E
SUPPLY CURRENT vs. TEMPERATURE
MAX481E-09
TEMPERATURE (°C)
SUPPLY CURRENT (100-4040080
MAX483E/MAX487E–MAX489E
SUPPLY CURRENT vs. TEMPERATURE
MAX481E-10
TEMPERATURE (°C)
SUPPLY CURRENT (100-4040080
MAX1487E
SUPPLY CURRENT vs. TEMPERATURE
MAX481E-11
TEMPERATURE (°C)
SUPPLY CURRENT (100-4040080
MAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E
±15kV ESD-Protected, Slew-Rate-Limited,
Low-Power, RS-485/RS-422 Transceivers
_______________________________________________________________________________________7
MAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E
______________________________________________________________Pin Description
MAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E
±15kV ESD-Protected, Slew-Rate-Limited,
Low-Power, RS-485/RS-422 Transceivers_______________________________________________________________________________________

Figure 2. MAX488E/MAX490E Pin Configuration and Typical Operating Circuit
Figure 3. MAX489E/MAX491E Pin Configuration and Typical Operating Circuit
Figure 1. MAX481E/MAX483E/MAX485E/MAX487E/MAX1487E Pin Configuration and Typical Operating Circuit
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