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MAX3483E/MAX3485E/
MAX3486E/MAX3488E/
MAX3490E/MAX3491E
3.3V-Powered, ±15kV ESD-Protected,
12Mbps and Slew-Rate-Limited
True RS-485/RS-422 Transceivers
General Description
Features
● ESD Protection for RS-485 I/O Pins
Devices in the MAX3483E family (MAX3483E/MAX3485E/
MAX3486E/MAX3488E/MAX3490E/MAX3491E) are
±15kV ESD-protected, +3.3V, low-power transceivers for
RS-485 and RS-422 communications. Each device con-
tains one driver and one receiver. The MAX3483E and
MAX3488E feature slew-rate-limited drivers that minimize
EMI and reduce reflections caused by improperly termi-
nated cables, allowing error-free data transmission at
data rates up to 250kbps. The partially slew-rate-limited
MAX3486E transmits up to 2.5Mbps. The MAX3485E,
MAX3490E, and MAX3491E transmit at up to 12Mbps.
• ±15kV—Human Body Model
• ±8kV—IEC 1000-4-2, Contact Discharge
• ±15kV—IEC 1000-4-2, Air-Gap Discharge
● Operate from a Single +3.3V Supply—
No Charge Pump Required
● Interoperable with +5V Logic
● Guaranteed 12Mbps Data Rate
(MAX3485E/MAX3490E/MAX3491E)
● Slew-Rate Limited for Errorless Data Transmission
(MAX3483E/MAX3488E)
All devices feature enhanced electrostatic discharge
(ESD) protection. All transmitter outputs and receiver
inputs are protected to ±15kV using IEC 1000-4-2 Air-Gap
Discharge, ±8kV using IEC 1000-4-2 Contact Discharge,
and ±15kV using the Human Body Model.
● 2nA Low-Current Shutdown Mode
(MAX3483E/MAX3485E/MAX3486E/MAX3491E)
● -7V to +12V Common-Mode Input Voltage Range
● Full-Duplex and Half-Duplex Versions Available
Drivers are short-circuit current limited and are protected
against excessive power dissipation by thermal shutdown
circuitry that places the driver outputs into a high-impedance
state. The receiver input has a fail-safe feature that guar-
antees a logic-high output if both inputs are open circuit.
● Industry-Standard 75176 Pinout
(MAX3483E/MAX3485E/MAX3486E)
● Current-Limiting and Thermal Shutdown for
Driver Overload Protection
The MAX3488E, MAX3490E, and MAX3491E feature full-
duplex communication, while the MAX3483E, MAX3485E,
and MAX3486E are designed for half-duplex communication.
Ordering Information
PART
TEMP. RANGE
0°C to+70°C
PIN-PACKAGE
8 SO
Applications
● Telecommunications
● Industrial-Control Local Area Networks
● Transceivers for EMI-Sensitive Applications
● Integrated Services Digital Networks
● Packet Switching
MAX3483ECSA
MAX3483ECPA
MAX3483EESA
MAX3483EEPA
0°C to+70°C
8 Plastic DIP
8 SO
-40°C to+85°C
-40°C to+85°C
8 Plastic DIP
Ordering Information continued at end of data sheet.
Selector Guide
GUARANTEED
DATA RATE
(Mbps)
SUPPLY
VOLTAGE
(V)
DRIVER/
RECEIVER
ENABLE
SHUTDOWN
CURRENT
(nA)
±15kV
ESD
PROTECTION
PART
NUMBER
HALF/FULL SLEW-RATE
PIN
COUNT
DUPLEX
LIMITED
MAX3483E
MAX3485E
MAX3486E
MAX3488E
MAX3490E
MAX3491E
0.25
12
Half
Half
Half
Full
Full
Full
Yes
No
Yes
Yes
Yes
No
2
2
Yes
Yes
Yes
Yes
Yes
Yes
8
8
2.5
0.25
12
Yes
Yes
No
2
8
3.0 to 3.6
—
—
2
8
No
8
12
No
Yes
14
19-1474; Rev 1; 5/19