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MAX3483/MAX3485/
MAX3486/MAX3488/
MAX3490/MAX3491
3.3V-Powered, 10Mbps and Slew-Rate-Limited
True RS-485/RS-422 Transceivers
General Description
Features
● Operate from a Single 3.3V Supply—
The MAX3483, MAX3485, MAX3486, MAX3488,
MAX3490, and MAX3491 are 3.3V, low-power transceivers for
RS-485 and RS-422 communication. Each part contains
one driver and one receiver. The MAX3483 and MAX3488
feature slew-rate-limited drivers that minimize EMI and
reduce reflections caused by improperly terminated
cables, allowing error-free data transmission at data rates
up to 250kbps. The partially slew-rate-limited MAX3486
transmits up to 2.5Mbps. The MAX3485, MAX3490, and
MAX3491 transmit at up to 10Mbps.
No Charge Pump!
● Interoperable with +5V Logic
● 8ns Max Skew (MAX3485/MAX3490/MAX3491)
● Slew-Rate Limited for Errorless Data Transmission
(MAX3483/MAX3488)
● 2nA Low-Current Shutdown Mode
(MAX3483/MAX3485/MAX3486/MAX3491)
● -7V to +12V Common-Mode Input Voltage Range
● Allows up to 32 Transceivers on the Bus
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-imped-
ance state. The receiver input has a fail-safe feature that
guarantees a logic-high output if both inputs are open
circuit.
● Full-Duplex and Half-Duplex Versions Available
● Industry Standard 75176 Pinout
(MAX3483/MAX3485/MAX3486)
● Current-Limiting and Thermal Shutdown for Driver
Overload Protection
The MAX3488, MAX3490, and MAX3491 feature full-
duplex communication, while the MAX3483, MAX3485, and
MAX3486 are designed for half-duplex communication.
Ordering Information
PART
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 Plastic DIP
8 SO
MAX3483CPA
MAX3483CSA
MAX3483C/D
MAX3483EPA
MAX3483ESA
MAX3485CPA
MAX3485CSA
MAX3485C/D
MAX3485EPA
MAX3485ESA
Applications
● Low-Power RS-485/RS-422 Transceivers
● Telecommunications
● Transceivers for EMI-Sensitive Applications
● Industrial-Control Local Area Networks
Dice*
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
Ordering Information continued at end of data sheet.
* Contact factory for for dice specifications.
Selection Table
GUARANTEED
DATA RATE
(Mbps)
SUPPLY
VOLTAGE
(V)
DRIVER/
RECEIVER
ENABLE
SHUTDOWN
CURRENT
(nA)
PART
NUMBER
HALF/FULL
DUPLEX
SLEW-RATE
LIMITED
PIN
COUNT
MAX3483
MAX3485
MAX3486
MAX3488
MAX3490
MAX3491
0.25
10
Half
Half
Half
Full
Full
Full
Yes
No
Yes
Yes
Yes
No
2
2
8
8
2.5
0.25
10
Yes
Yes
No
2
8
3.0 to 3.6
—
—
2
8
No
8
10
No
Yes
14
19-0333; Rev 1; 5/19