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MAX3080, MAX3081, MAX3082, MAX3083, MAX3084, MAX3085, MAX3086, MAX3087, MAX3088, MAX3089

Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers

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Active: In Production.


The MAX3080-MAX3089 high-speed transceivers for RS-485/RS-422 communication contain one driver and one receiver. These devices feature fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open or shorted. This means that the receiver output will be a logic high if all transmitters on a terminated bus are disabled (high impedance). The MAX3080/MAX3081/MAX3082 feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission up to 115kbps. The MAX3083/MAX3084/MAX3085 offer higher driver output slew-rate limits, allowing transmit speeds up to 500kbps. The MAX3086/MAX3087/MAX3088's driver slew rates are not limited, making transmit speeds up to 10Mbps possible. The MAX3089's slew rate is selectable between 115kbps, 500kbps, and 10Mbps by driving a selector pin with a single three-state driver.

These transceivers typically draw 375µA of supply current when unloaded, or when fully loaded with the drivers disabled.

All devices have a 1/8-unit-load receiver input impedance that allows up to 256 transceivers on the bus. The MAX3082/MAX3085/MAX3088 are intended for halfduplex communications, while the MAX3080/MAX3081/ MAX3083/MAX3084/MAX3086/MAX3087 are intended for full-duplex communications. The MAX3089 is selectable between half-duplex and full-duplex operation. It also features independently programmable receiver and transmitter output phase via separate pins.

Data Sheet

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Key Features

  • For Fault-Tolerant Applications:
    MAX3430: ±80V Fault-Protected, Fail-Safe, 1/4- Unit Load, +3.3V RS-485 Transceiver
  • For Low-Voltage Applications:
    MAX3362: +3.3V, High-Speed, RS-485/RS-422 Transceiver in a SOT23 Package
  • For Multiple Transceiver Applications:
    MAX3030E-MAX3033E: ±15kV ESD-Protected, +3.3V, Quad, RS-422 Transmitters
    MAX3040-MAX3045: ±10kV ESD-Protected, Quad, +5V, RS-485/RS-422 Transmitters


  • Industrial-Control Local Area Networks
  • Level Translators
  • RS-422/RS-485 Communications
  • Transceivers for EMI-Sensitive Applications

Key Specifications:

RS-422/485 Line Driver/Receivers
Part Number Tx/Rx Duplex VSUPPLY
Data Rate
Tx EN Rx EN ICC (Shutdn.)
Rx/Tx on Bus Budgetary
typ min typ See Notes
MAX3080  1Tx + 1Rx Full 5 0.375 115 Yes Yes 0.001 256 $1.62 @1k
MAX3081  Full 115 No No - $1.68 @1k
MAX3082  Half 115 Yes Yes 0.001 $1.62 @1k
MAX3083  Full 500 Yes Yes 0.001 $1.62 @1k
MAX3084  Full 500 No No - $1.62 @1k
MAX3085  Half 500 Yes Yes 0.001 $1.62 @1k
MAX3086  Full 10000 Yes Yes 0.001 $1.62 @1k
MAX3087  Full 10000 No No - $1.62 @1k
MAX3088  Half 10000 Yes Yes 0.001 $1.62 @1k
MAX3089  Half/Full 10000 Yes Yes 0.001 $1.62 @1k
See All RS-422/485 Line Driver/Receivers (171)

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.


MAX3080, MAX3083, MAX3086: Pin Configuration
Pin Configuration

MAX3081, MAX3084, MAX3087: Pin Configuration
Pin Configuration

MAX3082, MAX3085, MAX3088: Pin Configuration
Pin Configuration

MAX3089: Pin Configuration
Pin Configuration

Notes and Comments

Industry-standard pinout: 75180 (MAX3080)
Industry-standard pinout: 75179 (MAX3081)
Industry-standard pinout: 75176 (MAX3082)
Industry-standard pinout: 75180 (MAX3083)
Industry-standard pinout: 75179 (MAX3084)
Industry-standard pinout: 75176 (MAX3085)
Industry-standard pinout: 75180 (MAX3086)
Industry-standard pinout: 75179 (MAX3087)
Industry-standard pinout: 75176 (MAX3088)
Industry-standard pinout: 75180 (MAX3089)

More Information

RS485 Resources

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Document Ref.: 19-1138 Rev 2; 2004-03-11
This page last modified: 2009-11-06