MAX481/MAX483/MAX485/
MAX487–MAX491/MAX1487
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
General Description
The MAX481, MAX483, MAX485, MAX487–MAX491,
and MAX1487 are low-power transceivers for RS-485 and
RS-422 communication. Each part contains one driver
and one receiver.
Applications
●●
●●
●●
●●
●●
Benefits and Features
●● Low Power Consumption Minimizes Thermal
Dissipation, Reducing System Cost
• 120µA to 500µA Quiescent Current
• Shutdown Current of 0.1µA
• Single 5V Supply Voltage
●● Slew-Rate-Limited Drivers (MAX483/MAX487/
MAX488 and MAX489)
• Up to 250kbps Data Rate
• Unlimited Drivers: Up to 2.5Mbps Data Rate
Low-Power RS-485 Transceivers
Low-Power RS-422 Transceivers
Level Translators
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
●● Integrated Protection Enhances System Robustness
• Short Circuit Current Limited Driver
• Integrated Thermal Shutdown
• Receiver Fail-Safe for Input Open Circuit
Guarantees Logic High
●● 1/4 Unit Loading (MAX487/ MAX1487 only) Allows
Up to 128 Devices on a Single Bus
• 48kΩ Receiver Input Resistance
Ordering Information appears at end of data sheet.
Selection Table
PART
NUMBER
HALF/FULL
DUPLEX
DATA
RATE
(Mbps)
SLEW-RATE
LIMITED
LOW-POWER
SHUTDOWN
RECEIVER/
DRIVER
ENABLE
QUIESCENT
CURRENT
(µA)
NUMBER OF
RECEIVERS
ON BUS
PIN
COUNT
MAX481
Half
2.5
No
Yes
Yes
300
32
8
MAX483
Half
0.25
Yes
Yes
Yes
120
32
8
MAX485
Half
2.5
No
No
Yes
300
32
8
MAX487
Half
0.25
Yes
Yes
Yes
120
128
8
MAX488
Full
0.25
Yes
No
No
120
32
8
MAX489
Full
0.25
Yes
No
Yes
120
32
14
MAX490
Full
2.5
No
No
No
300
32
8
MAX491
Full
2.5
No
No
Yes
300
32
14
MAX1487
Half
2.5
No
No
Yes
230
128
8
19-0122; Rev 11; 12/16
