_______________General Description
The MAX3483, MAX3485, MAX3486, MAX3488,
MAX3490, and MAX3491 are 3.3V, low-power trans-
ceivers for RS-485 and RS-422 communication. Each
part contains one driver and one receiver. The
MAX3483 and MAX3488 feature slew-rate-limited dri-
vers that minimize EMI and reduce reflections caused
by improperly terminated cables, allowing error-free
data transmission at data rates up to 250kbps. The par-
tially slew-rate-limited MAX3486 transmits up to
2.5Mbps. The MAX3485, MAX3490, and MAX3491
transmit at up to 10Mbps.
Drivers are short-circuit current limited and are protect-
ed 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 guarantees a logic-high output if both
inputs are open circuit.
The MAX3488, MAX3490, and MAX3491 feature full-
duplex communication, while the MAX3483, MAX3485,
and MAX3486 are designed for half-duplex communi-
cation.
________________________Applications
Low-Power RS-485/RS-422 Transceivers
Telecommunications
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
____________________________Features
♦Operate from a Single 3.3V Supply—
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
♦Full-Duplex and Half-Duplex Versions Available
♦Industry Standard 75176 Pinout
(MAX3483/MAX3485/MAX3486)
♦Current-Limiting and Thermal Shutdown for
Driver Overload Protection
______________Ordering Information
Ordering Information continued at end of data sheet.
* Contact factory for for dice specifications.
MAX3483/MAX3485/MAX3486/MAX3488/MAX3490/MAX3491
3.3V-Powered, 10Mbps and Slew-Rate-Limited
True RS-485/RS-422 Transceivers
________________________________________________________________
Maxim Integrated Products
1
Call toll free 1-800-998-8800 for free samples or literature.
19-0333; Rev 0; 12/94
PART
MAX3483CPA
MAX3483CSA
MAX3483C/D 0°C to +70°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
8 Plastic DIP
8 SO
Dice*
PART
NUMBER
GUARANTEED
DATA RATE
(Mbps)
SUPPLY
VOLTAGE
(V)
HALF/FULL
DUPLEX SLEW-RATE
LIMITED
DRIVER/
RECEIVER
ENABLE
SHUTDOWN
CURRENT
(nA)
PIN
COUNT
MAX3483 0.25 Half Yes Yes 2 8
MAX3485 10 Half No Yes 2 8
MAX3486 2.5 Half Yes Yes 2 8
MAX3488 0.25 Full Yes No — 8
MAX3490 10 Full No No — 8
MAX3491 10
3.0 to 3.6
Full No Yes 2 14
______________________________________________________________Selection Table
MAX3483EPA
MAX3483ESA -40°C to +85°C
-40°C to +85°C 8 Plastic DIP
8 SO
MAX3485CPA
MAX3485CSA
MAX3485C/D 0°C to +70°C
0°C to +70°C
0°C to +70°C 8 Plastic DIP
8 SO
Dice*
MAX3485EPA
MAX3485ESA -40°C to +85°C
-40°C to +85°C 8 Plastic DIP
8 SO