MAX490

Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers


Please check latest availability status for a specific part variant.

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.

MAX1487, MAX481, MAX483, MAX485, MAX487, MAX488, MAX489, MAX490, MAX491: Pin Configuration and Typical Operating Circuit MAX1487, MAX481, MAX483, MAX485, MAX487, MAX488, MAX489, MAX490, MAX491: Pin Configuration and Typical Operating Circuit Enlarge+

Key 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
  • 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

Applications/Uses

  • Industrial-Control Local Area Networks
  • Level Translators
  • Low-Power RS-422 Transceivers
  • Low-Power RS-485 Transceivers
  • Transceivers for EMI-Sensitive Applications
Part Number Tx/Rx Duplex VSUPPLY
(V)
ICC
(mA)
Data Rate
(kbps)
Tx EN Rx EN ICC (Shutdn.)
(µA)
Rx/Tx on Bus Rx Failsafe w/ Inputs Slew Rate Limiting Oper. Temp.
(°C)
Package/Pins Budgetary
Price
typ min typ See Notes
MAX1487  1Tx + 1Rx Half 5 0.3 2500 Yes Yes - 128 Open No
-55 to +125
-40 to +85
0 to +70
µMAX/8
PDIP(N)/8
SOIC(N)/8
$1.54 @1k
MAX481  Half 0.5 2500 Yes Yes 0.1 32
µMAX/8
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
MAX483  Half 0.35 250 Yes Yes 0.1 32
µMAX/8
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
MAX485  Half 0.5 2500 Yes Yes - 32
µMAX/8
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
MAX487  Half 0.25 250 Yes Yes 0.1 128
µMAX/8
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
MAX488  Full 0.12 250 No No - 32
µMAX/8
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
MAX489  Full 0.12 250 Yes Yes - 32
CDIP(N)/14
PDIP(N)/14
SOIC(N)/14
MAX490  Full 0.3 2500 No No - 32
µMAX/8
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
MAX491  Full 0.3 2500 Yes Yes - 32
CDIP(N)/14
PDIP(N)/14
SOIC(N)/14
See All RS-485/RS-422 Line Driver/Receivers (198)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Technical Documents

App Note 4562 FAQs about Interface, RS-232, and RS-485 Circuits

Quality and Environmental Data

Product Reliability Reports: MAX490.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources

RS-485 Resources
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

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